在iOS开发中,我们知道有一个共同的基类——NSObject,但是对于界面视图而言,UIView是非常重要的一个类,UIView是很多视图控件的基类,因此,对于UIView的学习闲的非常有必要。在iOS学习——iOS 整体框架及类继承框架图中列出了iOS中所有类的继承框架图,其中下面这张图就是iOS开发中的界面相关类的继承框架图。
下面主要通过学习UIView.h文件来了解UIView主要提供了那些方法和属性,从UIView.h的源码来看,UIView.h的结构主要分为4个部分:
下面是UIView.h文件的源码分析,以下内容参考自:ios开发 之 UIView详解。
1 #import <Foundation/Foundation.h>
2 #import <QuartzCore/QuartzCore.h>
3 #import <UIKit/UIResponder.h>
4 #import <UIKit/UIInterface.h>
5 #import <UIKit/UIKitDefines.h>
6 #import <UIKit/UIAppearance.h>
7 #import <UIKit/UIDynamicBehavior.h>
8 #import <UIKit/NSLayoutConstraint.h>
9 #import <UIKit/UITraitCollection.h>
10 #import <UIKit/UIFocus.h>
11
12 NS_ASSUME_NONNULL_BEGIN
13
14 /** 动画的曲线枚举 */
15 typedef NS_ENUM(NSInteger, UIViewAnimationCurve) {
16 UIViewAnimationCurveEaseInOut, //!< 慢进慢出(默认值).
17 UIViewAnimationCurveEaseIn, //!< 慢进.
18 UIViewAnimationCurveEaseOut, //!< 慢出.
19 UIViewAnimationCurveLinear, //!< 匀速.
20 };
21
22 //!< UIView内容填充模式.
23 typedef NS_ENUM(NSInteger, UIViewContentMode) {
24 UIViewContentModeScaleToFill, //!< 缩放内容到合适比例大小.
25 UIViewContentModeScaleAspectFit, //!< 缩放内容到合适的大小,边界多余部分透明.
26 UIViewContentModeScaleAspectFill, //!< 缩放内容填充到指定大小,边界多余的部分省略.
27 UIViewContentModeRedraw, //!< 重绘视图边界 (需调用 -setNeedsDisplay).
28 UIViewContentModeCenter, //!< 视图保持等比缩放.
29 UIViewContentModeTop, //!< 视图顶部对齐.
30 UIViewContentModeBottom, //!< 视图底部对齐.
31 UIViewContentModeLeft, //!< 视图左侧对齐.
32 UIViewContentModeRight, //!< 视图右侧对齐.
33 UIViewContentModeTopLeft, //!< 视图左上角对齐.
34 UIViewContentModeTopRight, //!< 视图右上角对齐.
35 UIViewContentModeBottomLeft, //!< 视图左下角对齐.
36 UIViewContentModeBottomRight, //!< 视图右下角对齐.
37 };
38
39 /** UIView动画过渡效果 */
40 typedef NS_ENUM(NSInteger, UIViewAnimationTransition) {
41 UIViewAnimationTransitionNone, //!< 无效果.
42 UIViewAnimationTransitionFlipFromLeft, //!< 沿视图垂直中心轴左到右移动.
43 UIViewAnimationTransitionFlipFromRight, //!< 沿视图垂直中心轴右到左移动.
44 UIViewAnimationTransitionCurlUp, //!< 由底部向上卷起.
45 UIViewAnimationTransitionCurlDown, //!< 由顶部向下展开.
46 };
47
48 /** 自动调整大小方式 */
49 typedef NS_OPTIONS(NSUInteger, UIViewAutoresizing) {
50 UIViewAutoresizingNone = 0, //!< 不自动调整.
51 UIViewAutoresizingFlexibleLeftMargin = 1 << 0,//!< 自动调整与superView左边的距离,保证与superView右边的距离不变.
52 UIViewAutoresizingFlexibleWidth = 1 << 1,//!< 自动调整自己的宽度,保证与superView左边和右边的距离不变.
53 UIViewAutoresizingFlexibleRightMargin = 1 << 2,//!< 自动调整与superView的右边距离,保证与superView左边的距离不变.
54 UIViewAutoresizingFlexibleTopMargin = 1 << 3,//!< 自动调整与superView顶部的距离,保证与superView底部的距离不变.
55 UIViewAutoresizingFlexibleHeight = 1 << 4,//!< 自动调整自己的高度,保证与superView顶部和底部的距离不变.
56 UIViewAutoresizingFlexibleBottomMargin = 1 << 5 //!< 自动调整与superView底部的距离,也就是说,与superView顶部的距离不变.
57 };
58
59 /** UIView动画选项 */
60 typedef NS_OPTIONS(NSUInteger, UIViewAnimationOptions) {
61 UIViewAnimationOptionLayoutSubviews = 1 << 0, //!< 动画过程中保证子视图跟随运动.
62 UIViewAnimationOptionAllowUserInteraction = 1 << 1, //!< 动画过程中允许用户交互.
63 UIViewAnimationOptionBeginFromCurrentState = 1 << 2, //!< 所有视图从当前状态开始运行.
64 UIViewAnimationOptionRepeat = 1 << 3, //!< 重复运行动画.
65 UIViewAnimationOptionAutoreverse = 1 << 4, //!< 动画运行到结束点后仍然以动画方式回到初始点.
66 UIViewAnimationOptionOverrideInheritedDuration = 1 << 5, //!< 忽略嵌套动画时间设置.
67 UIViewAnimationOptionOverrideInheritedCurve = 1 << 6, //!< 忽略嵌套动画速度设置.
68 UIViewAnimationOptionAllowAnimatedContent = 1 << 7, //!< 动画过程中重绘视图(注意仅仅适用于转场动画).
69 UIViewAnimationOptionShowHideTransitionViews = 1 << 8, //!< 视图切换时直接隐藏旧视图、显示新视图,而不是将旧视图从父视图移除(仅仅适用于转场动画).
70 UIViewAnimationOptionOverrideInheritedOptions = 1 << 9, //!< 不继承父动画设置或动画类型.
71
72 UIViewAnimationOptionCurveEaseInOut = 0 << 16, //!< 动画先缓慢,然后逐渐加速.
73 UIViewAnimationOptionCurveEaseIn = 1 << 16, //!< 动画逐渐变慢.
74 UIViewAnimationOptionCurveEaseOut = 2 << 16, //!< 动画逐渐加速.
75 UIViewAnimationOptionCurveLinear = 3 << 16, //!< 动画匀速执行,默认值.
76
77 UIViewAnimationOptionTransitionNone = 0 << 20, //!< 没有转场动画效果.
78 UIViewAnimationOptionTransitionFlipFromLeft = 1 << 20, //!< 从左侧翻转效果.
79 UIViewAnimationOptionTransitionFlipFromRight = 2 << 20, //!< 从右侧翻转效果.
80 UIViewAnimationOptionTransitionCurlUp = 3 << 20, //!< 向后翻页的动画过渡效果.
81 UIViewAnimationOptionTransitionCurlDown = 4 << 20, //!< 向前翻页的动画过渡效果.
82 UIViewAnimationOptionTransitionCrossDissolve = 5 << 20, //!< 旧视图溶解消失显示下一个新视图的效果.
83 UIViewAnimationOptionTransitionFlipFromTop = 6 << 20, //!< 从上方翻转效果.
84 UIViewAnimationOptionTransitionFlipFromBottom = 7 << 20, //!< 从底部翻转效果.
85
86 UIViewAnimationOptionPreferredFramesPerSecondDefault = 0 << 24, //!< 默认的帧每秒.
87 UIViewAnimationOptionPreferredFramesPerSecond60 = 3 << 24, //!< 60帧每秒的帧速率.
88 UIViewAnimationOptionPreferredFramesPerSecond30 = 7 << 24, //!< 30帧每秒的帧速率.
89
90 } NS_ENUM_AVAILABLE_IOS(4_0);
91
92 typedef NS_OPTIONS(NSUInteger, UIViewKeyframeAnimationOptions) {
93 UIViewKeyframeAnimationOptionLayoutSubviews = UIViewAnimationOptionLayoutSubviews, //!< 动画过程中保证子视图跟随运动.
94 UIViewKeyframeAnimationOptionAllowUserInteraction = UIViewAnimationOptionAllowUserInteraction, //!< 动画过程中允许用户交互.
95 UIViewKeyframeAnimationOptionBeginFromCurrentState = UIViewAnimationOptionBeginFromCurrentState, //!< 所有视图从当前状态开始运行.
96 UIViewKeyframeAnimationOptionRepeat = UIViewAnimationOptionRepeat, //!< 重复运行动画.
97 UIViewKeyframeAnimationOptionAutoreverse = UIViewAnimationOptionAutoreverse, //!< 动画运行到结束点后仍然以动画方式回到初始点.
98 UIViewKeyframeAnimationOptionOverrideInheritedDuration = UIViewAnimationOptionOverrideInheritedDuration, //!< 忽略嵌套动画时间设置.
99 UIViewKeyframeAnimationOptionOverrideInheritedOptions = UIViewAnimationOptionOverrideInheritedOptions, //!< 不继承父动画设置或动画类型.
100
101 UIViewKeyframeAnimationOptionCalculationModeLinear = 0 << 10, //!< 连续运算模式, 默认.
102 UIViewKeyframeAnimationOptionCalculationModeDiscrete = 1 << 10, //!< 离散运算模式.
103 UIViewKeyframeAnimationOptionCalculationModePaced = 2 << 10, //!< 均匀执行运算模式.
104 UIViewKeyframeAnimationOptionCalculationModeCubic = 3 << 10, //!< 平滑运算模式.
105 UIViewKeyframeAnimationOptionCalculationModeCubicPaced = 4 << 10 //!< 平滑均匀运算模式.
106 } NS_ENUM_AVAILABLE_IOS(7_0);
107
108 typedef NS_ENUM(NSUInteger, UISystemAnimation) {
109 UISystemAnimationDelete, //!< 系统删除动画
110 } NS_ENUM_AVAILABLE_IOS(7_0);
111
112 typedef NS_ENUM(NSInteger, UIViewTintAdjustmentMode) {
113 UIViewTintAdjustmentModeAutomatic, //!< 自动的,与父视图相同.
114
115 UIViewTintAdjustmentModeNormal, //!< 未经修改的.
116 UIViewTintAdjustmentModeDimmed, //!< 饱和、暗淡的原始色.
117 } NS_ENUM_AVAILABLE_IOS(7_0);
118
119 typedef NS_ENUM(NSInteger, UISemanticContentAttribute) {
120 UISemanticContentAttributeUnspecified = 0, //!< 未指定,默认值
121 UISemanticContentAttributePlayback, //!< 打开/ RW / FF等播放控制按钮
122 UISemanticContentAttributeSpatial, //!< 控制导致某种形式的定向改变UI中,如分段控制文本对齐方式或在游戏中方向键
123 UISemanticContentAttributeForceLeftToRight, //!< 视图总是从左向右布局.
124 UISemanticContentAttributeForceRightToLeft //!< 视图总是从右向左布局.
125 } NS_ENUM_AVAILABLE_IOS(9_0);
126
127 @protocol UICoordinateSpace <NSObject>
128
129 /** 将像素point由point所在视图转换到目标视图view中,返回在目标视图view中的像素值 */
130 - (CGPoint)convertPoint:(CGPoint)point toCoordinateSpace:(id <UICoordinateSpace>)coordinateSpace NS_AVAILABLE_IOS(8_0);
131 /** 将像素point由point所在视图转换到目标视图view中,返回在目标视图view中的像素值 */
132 - (CGPoint)convertPoint:(CGPoint)point fromCoordinateSpace:(id <UICoordinateSpace>)coordinateSpace NS_AVAILABLE_IOS(8_0);
133 /** 将rect由rect所在视图转换到目标视图view中,返回在目标视图view中的rect */
134 - (CGRect)convertRect:(CGRect)rect toCoordinateSpace:(id <UICoordinateSpace>)coordinateSpace NS_AVAILABLE_IOS(8_0);
135 /** 将rect从view中转换到当前视图中,返回在当前视图中的rect */
136 - (CGRect)convertRect:(CGRect)rect fromCoordinateSpace:(id <UICoordinateSpace>)coordinateSpace NS_AVAILABLE_IOS(8_0);
137
138 /** 获取bounds */
139 @property (readonly, nonatomic) CGRect bounds NS_AVAILABLE_IOS(8_0);
140
141 @end
142
143 @class UIBezierPath, UIEvent, UIWindow, UIViewController, UIColor, UIGestureRecognizer, UIMotionEffect, CALayer, UILayoutGuide;
144
145 NS_CLASS_AVAILABLE_IOS(2_0) @interface UIView : UIResponder <NSCoding, UIAppearance, UIAppearanceContainer, UIDynamicItem, UITraitEnvironment, UICoordinateSpace, UIFocusItem, CALayerDelegate>
146
147 /** 返回主layer所使用的类 */
148 #if UIKIT_DEFINE_AS_PROPERTIES
149 @property(class, nonatomic, readonly) Class layerClass;
150 #else
151 + (Class)layerClass;
152 #endif
153
154 /** 通过Frame初始化UI对象 */
155 - (instancetype)initWithFrame:(CGRect)frame NS_DESIGNATED_INITIALIZER;
156 /** 用于xib初始化 */
157 - (nullable instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;
158
159 /** 设置用户交互,默认YES允许用户交互 */
160 @property(nonatomic,getter=isUserInteractionEnabled) BOOL userInteractionEnabled;
161 /** 控件标记(父控件可以通过tag找到对应的子控件),默认为0 */
162 @property(nonatomic) NSInteger tag;
163 /** 视图图层(可以用来设置圆角效果/阴影效果) */
164 @property(nonatomic,readonly,strong) CALayer *layer;
165
166 /** 返回是否可以成为焦点, 默认NO */
167 #if UIKIT_DEFINE_AS_PROPERTIES
168 @property(nonatomic,readonly) BOOL canBecomeFocused NS_AVAILABLE_IOS(9_0);
169 #else
170 - (BOOL)canBecomeFocused NS_AVAILABLE_IOS(9_0);
171 #endif
172 /** 是否可以被聚焦 */
173 @property (readonly, nonatomic, getter=isFocused) BOOL focused NS_AVAILABLE_IOS(9_0);
174
175 /** 左右滑动翻转效果 */
176 @property (nonatomic) UISemanticContentAttribute semanticContentAttribute NS_AVAILABLE_IOS(9_0);
177
178 /** 获取视图的方向 */
179 + (UIUserInterfaceLayoutDirection)userInterfaceLayoutDirectionForSemanticContentAttribute:(UISemanticContentAttribute)attribute NS_AVAILABLE_IOS(9_0);
180
181 /** 获取相对于指定视图的界面方向 */
182 + (UIUserInterfaceLayoutDirection)userInterfaceLayoutDirectionForSemanticContentAttribute:(UISemanticContentAttribute)semanticContentAttribute relativeToLayoutDirection:(UIUserInterfaceLayoutDirection)layoutDirection NS_AVAILABLE_IOS(10_0);
183
184 /** 返回即时内容的布局的方向 */
185 @property (readonly, nonatomic) UIUserInterfaceLayoutDirection effectiveUserInterfaceLayoutDirection NS_AVAILABLE_IOS(10_0);
186
187 @end
188
189 @interface UIView(UIViewGeometry)
190
191 /** 位置和尺寸(以父控件的左上角为坐标原点(0, 0)) */
192 @property(nonatomic) CGRect frame;
193
194 /** 位置和尺寸(以自己的左上角为坐标原点(0, 0)) */
195 @property(nonatomic) CGRect bounds;
196 /** 中心点(以父控件的左上角为坐标原点(0, 0)) */
197 @property(nonatomic) CGPoint center;
198 /** 变形属性(平移\缩放\旋转) */
199 @property(nonatomic) CGAffineTransform transform;
200 /** 视图内容的缩放比例 */
201 @property(nonatomic) CGFloat contentScaleFactor NS_AVAILABLE_IOS(4_0);
202
203 /** 是否支持多点触摸,默认NO */
204 @property(nonatomic,getter=isMultipleTouchEnabled) BOOL multipleTouchEnabled __TVOS_PROHIBITED;
205 /** 是否独占整个Touch事件,默认NO */
206 @property(nonatomic,getter=isExclusiveTouch) BOOL exclusiveTouch __TVOS_PROHIBITED;
207
208 /** 在指定点上点击测试指定事件 */
209 - (nullable UIView *)hitTest:(CGPoint)point withEvent:(nullable UIEvent *)event;
210 /** 判断当前的点击或者触摸事件的点是否在当前的view中,默认返回YES */
211 - (BOOL)pointInside:(CGPoint)point withEvent:(nullable UIEvent *)event;
212
213 /** 将像素point由point所在视图转换到目标视图view中,返回在目标视图view中的像素值 */
214 - (CGPoint)convertPoint:(CGPoint)point toView:(nullable UIView *)view;
215 /** 将像素point由point所在视图转换到目标视图view中,返回在目标视图view中的像素值 */
216 - (CGPoint)convertPoint:(CGPoint)point fromView:(nullable UIView *)view;
217 /** 将rect由rect所在视图转换到目标视图view中,返回在目标视图view中的rect */
218 - (CGRect)convertRect:(CGRect)rect toView:(nullable UIView *)view;
219 /** 将rect从view中转换到当前视图中,返回在当前视图中的rect */
220 - (CGRect)convertRect:(CGRect)rect fromView:(nullable UIView *)view;
221
222 /** 自动调整子视图尺寸,默认YES则会根据autoresizingMask属性自动调整子视图尺寸 */
223 @property(nonatomic) BOOL autoresizesSubviews;
224 /** 自动调整子视图与父视图的位置,默认UIViewAutoresizingNone */
225 @property(nonatomic) UIViewAutoresizing autoresizingMask;
226
227 /** 返回“最佳”大小适合给定的大小 */
228 - (CGSize)sizeThatFits:(CGSize)size;
229 /** 调整为刚好合适子视图大小 */
230 - (void)sizeToFit;
231
232 @end
233
234 @interface UIView(UIViewHierarchy)
235
236 /** 获取父视图 */
237 @property(nullable, nonatomic,readonly) UIView *superview;
238 /** 获取所有子视图 */
239 @property(nonatomic,readonly,copy) NSArray<__kindof UIView *> *subviews;
240 /** 获取视图所在的Window */
241 @property(nullable, nonatomic,readonly) UIWindow *window;
242
243 /** 从父视图中移除控件 */
244 - (void)removeFromSuperview;
245 /** 插入子视图(将子视图插入到subviews数组中index这个位置) */
246 - (void)insertSubview:(UIView *)view atIndex:(NSInteger)index;
247 /** 交换subviews数组中所存放子视图的位置 */
248 - (void)exchangeSubviewAtIndex:(NSInteger)index1 withSubviewAtIndex:(NSInteger)index2;
249
250 /** 添加子视图(新添加的视图在subviews数组的后面, 显示在最上面) */
251 - (void)addSubview:(UIView *)view;
252 /** 插入子视图(将子视图插到siblingSubview之下) */
253 - (void)insertSubview:(UIView *)view belowSubview:(UIView *)siblingSubview;
254 /** 插入子视图(将子视图插到siblingSubview之上) */
255 - (void)insertSubview:(UIView *)view aboveSubview:(UIView *)siblingSubview;
256
257 /** 将子视图拉到最上面来显示 */
258 - (void)bringSubviewToFront:(UIView *)view;
259 /** 将子视图拉到最下面来显示 */
260 - (void)sendSubviewToBack:(UIView *)view;
261
262 ##pragma mark - 系统自动调用(留给子类去实现)
263 /** 添加自视图完成后调用 */
264 - (void)didAddSubview:(UIView *)subview;
265 /** 将要移除自视图时调用 */
266 - (void)willRemoveSubview:(UIView *)subview;
267
268 /** 将要移动到新父视图时调用 */
269 - (void)willMoveToSuperview:(nullable UIView *)newSuperview;
270 /** 移动到新父视图完成后调用 */
271 - (void)didMoveToSuperview;
272 /** 将要移动到新Window时调用 */
273 - (void)willMoveToWindow:(nullable UIWindow *)newWindow;
274 /** 移动到新Window完成后调用 */
275 - (void)didMoveToWindow;
276
277 /** 判断view是否为子类 */
278 - (BOOL)isDescendantOfView:(UIView *)view;
279 /** 通过tag获得对应的子视图 */
280 - (nullable __kindof UIView *)viewWithTag:(NSInteger)tag;
281
282 /** 对现在有布局有调整更改后,使用这个方法进行更新 */
283 - (void)setNeedsLayout;
284 /** 强制进行更新layout */
285 - (void)layoutIfNeeded;
286
287 /** 控件的frame发生改变的时候就会调用,一般在这里重写布局子控件的位置和尺寸 */
288 - (void)layoutSubviews;
289
290 /** 设置view之间的间距,该属性只对autolayout布局有效 */
291 @property (nonatomic) UIEdgeInsets layoutMargins NS_AVAILABLE_IOS(8_0);
292 /** 是否将当前视图的间距和父视图相同,默认是NO */
293 @property (nonatomic) BOOL preservesSuperviewLayoutMargins NS_AVAILABLE_IOS(8_0);
294 /** 改变view的layoutMargins这个属性时,会触发这个方法 */
295 - (void)layoutMarginsDidChange NS_AVAILABLE_IOS(8_0);
296
297 /** 视图间距引导 */
298 @property(readonly,strong) UILayoutGuide *layoutMarginsGuide NS_AVAILABLE_IOS(9_0);
299
300 /** 获取此区域的内的布局引导 */
301 @property (nonatomic, readonly, strong) UILayoutGuide *readableContentGuide NS_AVAILABLE_IOS(9_0);
302 @end
303
304 @interface UIView(UIViewRendering)
305
306 /** 重写drawRect方法,在可以这里进行绘图操作。*/
307 - (void)drawRect:(CGRect)rect;
308
309 /** 标记整个视图的边界矩形需要重绘, 调用这个方法会自动调用drawRect方法 */
310 - (void)setNeedsDisplay;
311 /** 标记在指定区域内的视图的边界需要重绘, 调用这个方法会自动调用drawRect方法 */
312 - (void)setNeedsDisplayInRect:(CGRect)rect;
313
314 /** 是否裁剪超出Bounds范围的子控件,默认NO */
315 @property(nonatomic) BOOL clipsToBounds;
316 /** 设置背景颜色,默认nil */
317 @property(nullable, nonatomic,copy) UIColor *backgroundColor UI_APPEARANCE_SELECTOR;
318 /** 设置透明度(范围0.0~1.0),默认1.0 */
319 @property(nonatomic) CGFloat alpha;
320 /** 设置是否不透明,默认YES不透明 */
321 @property(nonatomic,getter=isOpaque) BOOL opaque;
322 /** 视图重绘前是否先清理以前的内容,默认YES */
323 @property(nonatomic) BOOL clearsContextBeforeDrawing;
324 /** 设置是否隐藏,默认NO不隐藏 */
325 @property(nonatomic,getter=isHidden) BOOL hidden;
326 /** 内容显示的模式,默认UIViewContentModeScaleToFill */
327 @property(nonatomic) UIViewContentMode contentMode;
328 /** 拉伸属性,如图片拉伸 */
329 @property(nonatomic) CGRect contentStretch NS_DEPRECATED_IOS(3_0,6_0) __TVOS_PROHIBITED;
330
331 /** 蒙板view */
332 @property(nullable, nonatomic,strong) UIView *maskView NS_AVAILABLE_IOS(8_0);
333
334 /** 改变应用程序的外观的颜色。默认为nil */
335 @property(null_resettable, nonatomic, strong) UIColor *tintColor NS_AVAILABLE_IOS(7_0);
336
337 /** 可以使tintColor变暗,因此整个视图层次变暗 */
338 @property(nonatomic) UIViewTintAdjustmentMode tintAdjustmentMode NS_AVAILABLE_IOS(7_0);
339
340 /** 覆盖这个方法的目的是为了当tintColor改变的时候自定义一些行为 */
341 - (void)tintColorDidChange NS_AVAILABLE_IOS(7_0);
342
343 @end
344
345 @interface UIView(UIViewAnimation)
346
347 /** 开始动画 */
348 + (void)beginAnimations:(nullable NSString *)animationID context:(nullable void *)context;
349 /** 提交动画 */
350 + (void)commitAnimations;
351
352 /** 设置动画代理, 默认nil */
353 + (void)setAnimationDelegate:(nullable id)delegate;
354 /** 动画将要开始时执行方法(必须要先设置动画代理), 默认NULL */
355 + (void)setAnimationWillStartSelector:(nullable SEL)selector;
356 /** 动画已结束时执行方法(必须要先设置动画代理), 默认NULL */
357 + (void)setAnimationDidStopSelector:(nullable SEL)selector;
358 /** 设置动画时长, 默认0.2秒 */
359 + (void)setAnimationDuration:(NSTimeInterval)duration;
360 /** 动画延迟执行时间, 默认0.0秒 */
361 + (void)setAnimationDelay:(NSTimeInterval)delay;
362 /** 设置在动画块内部动画属性改变的开始时间, 默认now ([NSDate date]) */
363 + (void)setAnimationStartDate:(NSDate *)startDate;
364 /** 设置动画曲线, 默认UIViewAnimationCurveEaseInOut */
365 + (void)setAnimationCurve:(UIViewAnimationCurve)curve;
366 /** 动画的重复播放次数, 默认0 */
367 + (void)setAnimationRepeatCount:(float)repeatCount;
368 /** 设置是否自定翻转当前的动画效果, 默认NO */
369 + (void)setAnimationRepeatAutoreverses:(BOOL)repeatAutoreverses;
370 /** 设置动画从当前状态开始播放, 默认NO */
371 + (void)setAnimationBeginsFromCurrentState:(BOOL)fromCurrentState;
372
373 /** 在动画块中为视图设置过渡动画 */
374 + (void)setAnimationTransition:(UIViewAnimationTransition)transition forView:(UIView *)view cache:(BOOL)cache;
375
376 /** 设置是否激活动画 */
377 + (void)setAnimationsEnabled:(BOOL)enabled;
378 /** 返回一个布尔值表示动画是否结束 */
379 #if UIKIT_DEFINE_AS_PROPERTIES
380 @property(class, nonatomic, readonly) BOOL areAnimationsEnabled;
381 #else
382 + (BOOL)areAnimationsEnabled;
383 #endif
384 /** 先检查动画当前是否启用,然后禁止动画,执行block内的方法,最后重新启用动画,而且这个方法不会阻塞基于CoreAnimation的动画 */
385 + (void)performWithoutAnimation:(void (NS_NOESCAPE ^)(void))actionsWithoutAnimation NS_AVAILABLE_IOS(7_0);
386
387 /** 当前动画的持续时间 */
388 #if UIKIT_DEFINE_AS_PROPERTIES
389 @property(class, nonatomic, readonly) NSTimeInterval inheritedAnimationDuration NS_AVAILABLE_IOS(9_0);
390 #else
391 + (NSTimeInterval)inheritedAnimationDuration NS_AVAILABLE_IOS(9_0);
392 #endif
393
394 @end
395
396 @interface UIView(UIViewAnimationWithBlocks)
397
398 /** 用于对一个或多个视图的改变的持续时间、延时、选项动画完成时的操作 */
399 + (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(4_0);
400
401 /** 用于对一个或多个视图的改变的持续时间、选项动画完成时的操作,默认:delay = 0.0, options = 0 */
402 + (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(4_0);
403
404 /** 用于对一个或多个视图的改变的持续时间内动画完成时的操作,默认:delay = 0.0, options = 0, completion = NULL */
405 + (void)animateWithDuration:(NSTimeInterval)duration animations:(void (^)(void))animations NS_AVAILABLE_IOS(4_0);
406
407 /** 使用与物理弹簧运动相对应的定时曲线执行视图动画 */
408 + (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay usingSpringWithDamping:(CGFloat)dampingRatio initialSpringVelocity:(CGFloat)velocity options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(7_0);
409
410 /** 为指定的容器视图创建转换动画 */
411 + (void)transitionWithView:(UIView *)view duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options animations:(void (^ __nullable)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(4_0);
412
413 /** 使用给定的参数在指定视图之间创建转换动画 */
414 + (void)transitionFromView:(UIView *)fromView toView:(UIView *)toView duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(4_0); // toView added to fromView.superview, fromView removed from its superview
415
416 /** 在一个或多个视图上执行指定的系统提供的动画,以及定义的可选并行动画 */
417 + (void)performSystemAnimation:(UISystemAnimation)animation onViews:(NSArray<__kindof UIView *> *)views options:(UIViewAnimationOptions)options animations:(void (^ __nullable)(void))parallelAnimations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(7_0);
418
419 @end
420
421 /** UIView的关键帧动画 */
422 @interface UIView (UIViewKeyframeAnimations)
423
424 /** 创建一个动画块对象,可用于为当前视图设置基于关键帧的动画 */
425 + (void)animateKeyframesWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewKeyframeAnimationOptions)options animations:(void (^)(void))animations completion:(void (^ __nullable)(BOOL finished))completion NS_AVAILABLE_IOS(7_0);
426 /** 添加指定开始时间、持续时间的关键帧动画(起始和持续时间是0.0和1.0之间的值) */
427 + (void)addKeyframeWithRelativeStartTime:(double)frameStartTime relativeDuration:(double)frameDuration animations:(void (^)(void))animations NS_AVAILABLE_IOS(7_0);
428
429 @end
430
431 @interface UIView (UIViewGestureRecognizers)
432
433 /** 当前视图所附加的所有手势识别器 */
434 @property(nullable, nonatomic,copy) NSArray<__kindof UIGestureRecognizer *> *gestureRecognizers NS_AVAILABLE_IOS(3_2);
435
436 /** 添加一个手势识别器 */
437 - (void)addGestureRecognizer:(UIGestureRecognizer*)gestureRecognizer NS_AVAILABLE_IOS(3_2);
438 /** 移除一个手势识别器 */
439 - (void)removeGestureRecognizer:(UIGestureRecognizer*)gestureRecognizer NS_AVAILABLE_IOS(3_2);
440
441 /** 开始一个手势识别器 */
442 - (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer NS_AVAILABLE_IOS(6_0);
443
444 @end
445
446 @interface UIView (UIViewMotionEffects)
447
448 /** 添加运动效果,当倾斜设备时视图稍微改变其位置 */
449 - (void)addMotionEffect:(UIMotionEffect *)effect NS_AVAILABLE_IOS(7_0);
450
451 /** 移除运动效果 */
452 - (void)removeMotionEffect:(UIMotionEffect *)effect NS_AVAILABLE_IOS(7_0);
453
454 /** 所有添加的运动效果 */
455 @property (copy, nonatomic) NSArray<__kindof UIMotionEffect *> *motionEffects NS_AVAILABLE_IOS(7_0);
456
457 @end
458
459
460 typedef NS_ENUM(NSInteger, UILayoutConstraintAxis) {
461 UILayoutConstraintAxisHorizontal = 0, //!< 水平约束.
462 UILayoutConstraintAxisVertical = 1 //!< 竖直约束.
463 };
464
465
466 @interface UIView (UIConstraintBasedLayoutInstallingConstraints)
467
468 /** 获取所有约束 */
469 @property(nonatomic,readonly) NSArray<__kindof NSLayoutConstraint *> *constraints NS_AVAILABLE_IOS(6_0);
470
471 /** 添加一个约束 */
472 - (void)addConstraint:(NSLayoutConstraint *)constraint NS_AVAILABLE_IOS(6_0);
473 /** 添加多个约束 */
474 - (void)addConstraints:(NSArray<__kindof NSLayoutConstraint *> *)constraints NS_AVAILABLE_IOS(6_0);
475 /** 移除一个约束 */
476 - (void)removeConstraint:(NSLayoutConstraint *)constraint NS_AVAILABLE_IOS(6_0);
477 /** 移除多个约束 */
478 - (void)removeConstraints:(NSArray<__kindof NSLayoutConstraint *> *)constraints NS_AVAILABLE_IOS(6_0);
479 @end
480
481
482 @interface UIView (UIConstraintBasedLayoutCoreMethods)
483 /** 更新视图和其子视图的约束 */
484 - (void)updateConstraintsIfNeeded NS_AVAILABLE_IOS(6_0);
485 /** 为视图更新约束,可以重写这个方法来设置当前view局部的布局约束 */
486 - (void)updateConstraints NS_AVAILABLE_IOS(6_0) NS_REQUIRES_SUPER;
487 /** 视图的约束是否需要更新 */
488 - (BOOL)needsUpdateConstraints NS_AVAILABLE_IOS(6_0);
489 /** 设置视图的约束需要更新,调用这个方法,系统会调用updateConstraints去更新布局 */
490 - (void)setNeedsUpdateConstraints NS_AVAILABLE_IOS(6_0);
491 @end
492
493
494 @interface UIView (UIConstraintBasedCompatibility)
495
496 /** 是否启用自动布局约束,默认YES. IB默认是NO */
497 @property(nonatomic) BOOL translatesAutoresizingMaskIntoConstraints NS_AVAILABLE_IOS(6_0);
498
499 /** 是否使用约束布局 */
500 #if UIKIT_DEFINE_AS_PROPERTIES
501 @property(class, nonatomic, readonly) BOOL requiresConstraintBasedLayout NS_AVAILABLE_IOS(6_0);
502 #else
503 + (BOOL)requiresConstraintBasedLayout NS_AVAILABLE_IOS(6_0);
504 #endif
505
506 @end
507
508
509 @interface UIView (UIConstraintBasedLayoutLayering)
510
511 /** 返回给定框架的视图的对齐矩阵 */
512 - (CGRect)alignmentRectForFrame:(CGRect)frame NS_AVAILABLE_IOS(6_0);
513 /** 返回给定对齐矩形的视图的frame */
514 - (CGRect)frameForAlignmentRect:(CGRect)alignmentRect NS_AVAILABLE_IOS(6_0);
515
516 /** 返回从视图的frame上定义的对齐矩阵的边框 */
517 #if UIKIT_DEFINE_AS_PROPERTIES
518 @property(nonatomic, readonly) UIEdgeInsets alignmentRectInsets NS_AVAILABLE_IOS(6_0);
519 #else
520 - (UIEdgeInsets)alignmentRectInsets NS_AVAILABLE_IOS(6_0);
521 #endif
522
523 /** 返回满足基线约束条件的视图 */
524 - (UIView *)viewForBaselineLayout NS_DEPRECATED_IOS(6_0, 9_0, "Override -viewForFirstBaselineLayout or -viewForLastBaselineLayout as appropriate, instead") __TVOS_PROHIBITED;
525
526 /** 返回用于满足第一基线约束的视图 */
527 @property(readonly,strong) UIView *viewForFirstBaselineLayout NS_AVAILABLE_IOS(9_0);
528
529 /** 返回用于满足上次基线约束的视图 */
530 @property(readonly,strong) UIView *viewForLastBaselineLayout NS_AVAILABLE_IOS(9_0);
531
532
533 UIKIT_EXTERN const CGFloat UIViewNoIntrinsicMetric NS_AVAILABLE_IOS(6_0); // -1
534 /** 返回接收对象的原本大小 */
535 #if UIKIT_DEFINE_AS_PROPERTIES
536 @property(nonatomic, readonly) CGSize intrinsicContentSize NS_AVAILABLE_IOS(6_0);
537 #else
538 - (CGSize)intrinsicContentSize NS_AVAILABLE_IOS(6_0);
539 #endif
540 /** 废除视图原本内容的size */
541 - (void)invalidateIntrinsicContentSize NS_AVAILABLE_IOS(6_0);
542
543 /** 设置当视图要变大时,视图的压缩改变方式,返回一个优先权(确定view有多大的优先级阻止自己变大) */
544 - (UILayoutPriority)contentHuggingPriorityForAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(6_0);
545 /** 设置放先权 */
546 - (void)setContentHuggingPriority:(UILayoutPriority)priority forAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(6_0);
547
548 /** 设置当视图要变小时,视图的压缩改变方式,是水平缩小还是垂直缩小,并返回一个优先权(确定有多大的优先级阻止自己变小) */
549 - (UILayoutPriority)contentCompressionResistancePriorityForAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(6_0);
550 /** 设置优先权 */
551 - (void)setContentCompressionResistancePriority:(UILayoutPriority)priority forAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(6_0);
552 @end
553
554 // Size To Fit
555
556 UIKIT_EXTERN const CGSize UILayoutFittingCompressedSize NS_AVAILABLE_IOS(6_0);
557 UIKIT_EXTERN const CGSize UILayoutFittingExpandedSize NS_AVAILABLE_IOS(6_0);
558
559 @interface UIView (UIConstraintBasedLayoutFittingSize)
560 /** 返回满足持有约束的视图的size */
561 - (CGSize)systemLayoutSizeFittingSize:(CGSize)targetSize NS_AVAILABLE_IOS(6_0);
562 /** 返回满足它所包含的约束的视图的大小 */
563 - (CGSize)systemLayoutSizeFittingSize:(CGSize)targetSize withHorizontalFittingPriority:(UILayoutPriority)horizontalFittingPriority verticalFittingPriority:(UILayoutPriority)verticalFittingPriority NS_AVAILABLE_IOS(8_0);
564 @end
565
566 @interface UIView (UILayoutGuideSupport)
567
568 /** 此视图拥有布局向导对象的数组 */
569 @property(nonatomic,readonly,copy) NSArray<__kindof UILayoutGuide *> *layoutGuides NS_AVAILABLE_IOS(9_0);
570
571 /** 向视图中添加布局向导 */
572 - (void)addLayoutGuide:(UILayoutGuide *)layoutGuide NS_AVAILABLE_IOS(9_0);
573
574 /** 向视图中添加布局向导 */
575 - (void)removeLayoutGuide:(UILayoutGuide *)layoutGuide NS_AVAILABLE_IOS(9_0);
576 @end
577
578 @class NSLayoutXAxisAnchor,NSLayoutYAxisAnchor,NSLayoutDimension;
579 @interface UIView (UIViewLayoutConstraintCreation)
580 /** 布局视图的前缘框的布局锚点 */
581 @property(readonly, strong) NSLayoutXAxisAnchor *leadingAnchor NS_AVAILABLE_IOS(9_0);
582 /** 布局视图的后缘边框的布局锚点 */
583 @property(readonly, strong) NSLayoutXAxisAnchor *trailingAnchor NS_AVAILABLE_IOS(9_0);
584 /** 布局视图的左边框的布局锚点 */
585 @property(readonly, strong) NSLayoutXAxisAnchor *leftAnchor NS_AVAILABLE_IOS(9_0);
586 /** 布局视图的右边框的布局锚点 */
587 @property(readonly, strong) NSLayoutXAxisAnchor *rightAnchor NS_AVAILABLE_IOS(9_0);
588 /** 布局视图的顶边框的布局锚点 */
589 @property(readonly, strong) NSLayoutYAxisAnchor *topAnchor NS_AVAILABLE_IOS(9_0);
590 /** 布局视图的底边框的布局锚点 */
591 @property(readonly, strong) NSLayoutYAxisAnchor *bottomAnchor NS_AVAILABLE_IOS(9_0);
592 /** 布局视图的宽度 */
593 @property(readonly, strong) NSLayoutDimension *widthAnchor NS_AVAILABLE_IOS(9_0);
594 /** 布局视图的高度 */
595 @property(readonly, strong) NSLayoutDimension *heightAnchor NS_AVAILABLE_IOS(9_0);
596 /** 布局视图的水平中心轴 */
597 @property(readonly, strong) NSLayoutXAxisAnchor *centerXAnchor NS_AVAILABLE_IOS(9_0);
598 /** 布局视图的垂直中心轴 */
599 @property(readonly, strong) NSLayoutYAxisAnchor *centerYAnchor NS_AVAILABLE_IOS(9_0);
600 /** 一个代表对视图中的文本的最高线基线布置锚 */
601 @property(readonly, strong) NSLayoutYAxisAnchor *firstBaselineAnchor NS_AVAILABLE_IOS(9_0);
602 /** 一个代表对视图中的文本的最低线基线布置锚 */
603 @property(readonly, strong) NSLayoutYAxisAnchor *lastBaselineAnchor NS_AVAILABLE_IOS(9_0);
604
605 @end
606
607 @interface UIView (UIConstraintBasedLayoutDebugging)
608
609 /** 获得实体在不同方向上所有的布局约束 */
610 - (NSArray<__kindof NSLayoutConstraint *> *)constraintsAffectingLayoutForAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(6_0);
611
612 /** 可以知道当前视图的布局是否会有歧义 */
613 #if UIKIT_DEFINE_AS_PROPERTIES
614 @property(nonatomic, readonly) BOOL hasAmbiguousLayout NS_AVAILABLE_IOS(6_0);
615 #else
616 - (BOOL)hasAmbiguousLayout NS_AVAILABLE_IOS(6_0);
617 #endif
618
619 /** 这个方法会随机改变视图的layout到另外一个有效的layout。这样我们就可以很清楚的看到哪一个layout导致了整体的布局约束出现了错误,或者我们应该增加更多的布局约束 */
620 - (void)exerciseAmbiguityInLayout NS_AVAILABLE_IOS(6_0);
621 @end
622
623 /** 约束调试,只在DEBUG环境下被调用 */
624 @interface UILayoutGuide (UIConstraintBasedLayoutDebugging)
625
626 /** 获得实体在不同方向上所有的布局约束 */
627 - (NSArray<__kindof NSLayoutConstraint *> *)constraintsAffectingLayoutForAxis:(UILayoutConstraintAxis)axis NS_AVAILABLE_IOS(10_0);
628
629 /** 可以知道当前视图的布局是否会有歧义 */
630 #if UIKIT_DEFINE_AS_PROPERTIES
631 @property(nonatomic, readonly) BOOL hasAmbiguousLayout NS_AVAILABLE_IOS(10_0);
632 #else
633 - (BOOL)hasAmbiguousLayout NS_AVAILABLE_IOS(10_0);
634 #endif
635 @end
636
637 #pragma mark - View状态保存恢复
638 @interface UIView (UIStateRestoration)
639 /** 标示是否支持保存,恢复视图状态信息 */
640 @property (nullable, nonatomic, copy) NSString *restorationIdentifier NS_AVAILABLE_IOS(6_0);
641 /** 保存视图状态相关的信息 */
642 - (void) encodeRestorableStateWithCoder:(NSCoder *)coder NS_AVAILABLE_IOS(6_0);
643 /** 恢复和保持视图状态相关信息 */
644 - (void) decodeRestorableStateWithCoder:(NSCoder *)coder NS_AVAILABLE_IOS(6_0);
645 @end
646
647 #pragma mark - View快照
648 @interface UIView (UISnapshotting)
649 /** 将当前显示的view截取成一个新的view */
650 - (nullable UIView *)snapshotViewAfterScreenUpdates:(BOOL)afterUpdates NS_AVAILABLE_IOS(7_0);
651 /** 缩放一个view默认是从中心点进行缩放的 */
652 - (nullable UIView *)resizableSnapshotViewFromRect:(CGRect)rect afterScreenUpdates:(BOOL)afterUpdates withCapInsets:(UIEdgeInsets)capInsets NS_AVAILABLE_IOS(7_0);
653 /** 屏幕快照 */
654 - (BOOL)drawViewHierarchyInRect:(CGRect)rect afterScreenUpdates:(BOOL)afterUpdates NS_AVAILABLE_IOS(7_0);
655 @end
656
657 NS_ASSUME_NONNULL_END