将触摸应用于自定义控件
将触摸应用于自定义控件
提问于 2013-08-12 16:14:32
我做了一个自定义的圆形控件，因为我从我的RootView控制器通过滑块发送值。你能帮我吗?如果我可以改变值，如何将触摸应用到Circle控件，就像在我的custom Circle周围制作自定义滑块一样。
#import "RKCustomCircle.h"
@implementation RKCustomCircle
@synthesize sliderPerccentageValue;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
xPos = 320/2;
yPos = 250;
radius = 80;
rotationAngle = 0;
}
return self;
}
- (void)drawRect:(CGRect)rect
{
CGContextRef context = UIGraphicsGetCurrentContext();
[self drawCircleChart: context];
}
- (void) drawCircleChart:(CGContextRef) context
{
CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor);
CGContextFillRect(context, CGRectMake(0, 0, 320, 480));
float a = rotationAngle;
[self drawCirclewithStartingAngle:a withContext:context];
}
- (void) drawCirclewithStartingAngle:(float)startAngle withContext:(CGContextRef) context
{
float endAngle = startAngle + (sliderPerccentageValue/ 100) * (M_PI*2);
float adjY = yPos;
float rad = radius;
CGContextSetFillColorWithColor(context, [UIColor greenColor].CGColor);
CGContextSetStrokeColorWithColor(context,[UIColor blackColor].CGColor);
CGContextSetLineWidth(context, 1.0);
CGContextBeginPath(context);
CGContextMoveToPoint(context, xPos, adjY);
CGContextAddArc(context, xPos, adjY, rad, startAngle, endAngle, 0);
CGContextClosePath(context);
CGContextDrawPath(context, kCGPathFillStroke);
}RootView是，
@implementation RKViewController
- (void)viewDidLoad
{
[super viewDidLoad];
circleView = [[RKCustomCircle alloc] initWithFrame:CGRectMake(0, 100, 320, 360)];
[circleView addTarget:self action:@selector(newValue:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:circleView];
}
- (IBAction)sliderValueChangedInPercentage:(UISlider *)sender {
circleView.sliderPerccentageValue =sender.value;
[circleView setNeedsDisplay];
}Stack Overflow用户
发布于 2013-08-12 16:24:35
使用UITapGestureRecognizer。
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(oneTap:)];
[singleTap setNumberOfTapsRequired:1];
[singleTap setNumberOfTouchesRequired:1];
[circleView addGestureRecognizer:singleTap];添加此方法
- (void)oneTap:(UIGestureRecognizer *)gesture
{
NSLog(@"Touch occur");
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/18182253
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