如何在UIButton中添加阴影？
如何在UIButton中添加阴影？
提问于 2010-02-23 08:34:43
我想给UIButton添加一个阴影。我尝试使用self.layer.shadow*属性。这些属性在UIView中有效，但在UIButton中的行为有所不同。如果我能得到任何指示来绘制投影，我将非常感激。谢谢!
self.layer.cornerRadius = 8.0f;
self.layer.masksToBounds = YES;
self.layer.borderWidth = 1.0f;
self.layer.shadowColor = [UIColor greenColor].CGColor;
self.layer.shadowOpacity = 0.8;
self.layer.shadowRadius = 12;
self.layer.shadowOffset = CGSizeMake(12.0f, 12.0f);回答 5
Stack Overflow用户
发布于 2011-06-15 04:47:20
在这个问题中只有一个小错误导致阴影无法显示：masksToBounds:YES也屏蔽了阴影！下面是正确的代码：
self.layer.cornerRadius = 8.0f;
self.layer.masksToBounds = NO;
self.layer.borderWidth = 1.0f;
self.layer.shadowColor = [UIColor greenColor].CGColor;
self.layer.shadowOpacity = 0.8;
self.layer.shadowRadius = 12;
self.layer.shadowOffset = CGSizeMake(12.0f, 12.0f);不幸的是，这意味着我们不能在没有技巧的情况下同时屏蔽内容和阴影。
记住要使用#import <QuartzCore/QuartzCore.h>。
Stack Overflow用户
发布于 2013-04-23 10:15:19
如果您正在使用UIButton，这里有一个简单的解决方案
#import <QuartzCore/QuartzCore.h>
button.imageView.layer.cornerRadius = 7.0f;
button.layer.shadowRadius = 3.0f;
button.layer.shadowColor = [UIColor blackColor].CGColor;
button.layer.shadowOffset = CGSizeMake(0.0f, 1.0f);
button.layer.shadowOpacity = 0.5f;
button.layer.masksToBounds = NO;只是让它工作，并认为它值得张贴。希望这能有所帮助！
Stack Overflow用户
发布于 2011-07-07 06:18:09
这是一个子类，它不仅创建了投影，而且当你按下按钮时，它会向下动画。
//
// ShadowButton.h
#import <Foundation/Foundation.h>
@interface ShadowButton : UIButton {
}
@end
//
// ShadowButton.m
#import "ShadowButton.h"
#import <QuartzCore/QuartzCore.h>
@implementation ShadowButton
-(void)setupView{
self.layer.shadowColor = [UIColor blackColor].CGColor;
self.layer.shadowOpacity = 0.5;
self.layer.shadowRadius = 1;
self.layer.shadowOffset = CGSizeMake(2.0f, 2.0f);
}
-(id)initWithFrame:(CGRect)frame{
if((self = [super initWithFrame:frame])){
[self setupView];
}
return self;
}
-(id)initWithCoder:(NSCoder *)aDecoder{
if((self = [super initWithCoder:aDecoder])){
[self setupView];
}
return self;
}
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
self.contentEdgeInsets = UIEdgeInsetsMake(1.0,1.0,-1.0,-1.0);
self.layer.shadowOffset = CGSizeMake(1.0f, 1.0f);
self.layer.shadowOpacity = 0.8;
[super touchesBegan:touches withEvent:event];
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
self.contentEdgeInsets = UIEdgeInsetsMake(0.0,0.0,0.0,0.0);
self.layer.shadowOffset = CGSizeMake(2.0f, 2.0f);
self.layer.shadowOpacity = 0.5;
[super touchesEnded:touches withEvent:event];
}
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原文链接：
https://stackoverflow.com/questions/2315366
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