UITouch
作者:互联网
一.Touch常用属性
window 触摸产生时所处的窗口
view 触摸时所产生的视图
tapCount 短时间内点按屏幕的次数,可以判断tapCount时点击,双击,或更多点击
timestamp 记录触摸事件产生或变化时的时间
phase 当前事件所处状态
touchu常用方法
返回的位置是针对view的原点
-(CGPoint)locationInView:(UIView *)view
//记录前一个触摸点位置
-(CGPoint)previousLocationInView:(UIView *)view
UIEvent
事件对象,记录时间产生时刻和类型,每产生一个事件,就会产生一个Event对象
属性
type
subtype
事件产生时间
timestamp
二.代理方法
//触摸开始
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
//获取到点击对象
UITouch *touch = [touches anyObject];
NSLog(@"触摸开始--是几根手指%ld",touch.tapCount);
}
//触摸移动
-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
//获取移动偏移量
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView:self];
CGPoint preLocation = [touch previousLocationInView:self];
CGPoint offset = CGPointMake(location.x-preLocation.x, location.y-preLocation.y);
NSLog(@"offset.x--%f offset.y--%f",preLocation.x,preLocation.y);
}
//触摸结束
-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
NSLog(@"触摸结束");
}
//触摸取消,可能会经历
-(void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
}
标签:touches,CGPoint,触摸,UIEvent,UITouch,touch,preLocation 来源: https://blog.csdn.net/qq_30211165/article/details/98478751