(1)设置根视图控制器
【UI初级|手指触摸事件【小球跟随手指】】(2)将TouchView添加到RootViewController
(3)TouchView.h将_view设为全局变量
TouchView.m
#import "TouchView.h"@implementation TouchView- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {//开启多点触摸
self.multipleTouchEnabled = YES;
//开启相应时间,默认是yes，除了imageView
self.userInteractionEnabled = YES;
_view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 15, 15)];
_view.backgroundColor = [UIColor redColor];
[self addSubview:_view];
}
return self;
}//开始触摸，手指触摸到屏幕的时候调用的方法
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {//点击的手指的个数
NSInteger touchCount = touches.count;
//NSLog(@"touchCount:%d",touchCount);
//取出点击的touch
UITouch *touch = [touches anyObject];
//取得他的点击次数
NSInteger count = [touch tapCount];
//touch.tapCount
//NSLog(@"count:%d",count);
if (count == 1) {
//单击的时候调用的方法
//[self signalTap];
//延迟调用单击的方法
[self performSelector:@selector(signalTap) withObject:nil afterDelay:.5];
}else if (count == 2) {
//双击的时候调用的方法
//[self doubleTap];
//取消单击的方法
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(signalTap) object:nil];
[self doubleTap];
}//获取点击的所在window
//UIWindow *window = touch.window;
//NSLog(@"window:%@",window);
//获取点击所在的视图
//UIView *view = touch.view;
//NSLog(@"view:%@",view);
//取得点击的坐标
CGPoint point = [touch locationInView:self];
//_view.frame.origin = point;
不可以
CGRect frame = _view.frame;
frame.origin = point;
_view.frame = frame;
}//单击响应的事件
- (void)signalTap {NSLog(@"单击");
}- (void)doubleTap {
NSLog(@"双击");
}//手指在屏幕上移动的时候调用的方法,如果手指在屏幕上移动的时候，这个方法会不停的调用
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {UITouch *touch = [touches anyObject];
//取得点击的坐标
CGPoint point = [touch locationInView:self];
//取得前一次的坐标
//[touch previousLocationInView:<#(UIView *)#>]CGRect frame = _view.frame;
frame.origin = point;
_view.frame = frame;
}触摸结束的时候调用的方法
//- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
//NSLog(@"touchesEnded");
//}
//
触摸取消的时候调用的方法
//- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
//
//
//NSLog(@"touchesCancelled");
//
//}//手机开始摇动的时候调用的方法
- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event {}//- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
//- (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event@end
