触发事件续

Main.storyboard

CZView.h

#import <UIKit/UIKit.h>

 

@interface CZView : UIView

 

@end

CZView.m

//

//  CZView.m

//  6A05.触摸事件

//

//  Created by huan on 16/1/30.

//  Copyright © 2016年 huanxi. All rights reserved.

//

 

#import "CZView.h"

 

@implementation CZView

 

/*

// Only override drawRect: if you perform custom drawing.

// An empty implementation adversely affects performance during animation.

- (void)drawRect:(CGRect)rect {

    // Drawing code

}

*/

 

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

    return;

    NSLog(@"%s", __func__);

    //获取当前触摸点的UITouch对象

    UITouch *touch = [touches anyObject];

    //触摸的view

    NSLog(@"%@", touch.view);

    

    //tapCount 点击的次数

    NSLog(@"%ld", touch.tapCount);

    

    //获取当前 触摸的位置

#warning 传一个nil 获取的触摸点的位置是在window上去  self = touch.view

    CGPoint touchPosition = [touch locationInView:self];

    NSLog(@"%@", NSStringFromCGPoint(touchPosition));

}

 

-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

    NSLog(@"%s", __func__);

    //获取当前触摸点的UITouch对象

    UITouch *touch = [touches anyObject];

    //获取当前触摸的位置

    CGPoint current = [touch locationInView:touch.view];

    //获取触摸前的位置

    CGPoint previous = [touch previousLocationInView:touch.view];

    NSLog(@"触摸前的点：%@ 当前触摸点：%@", NSStringFromCGPoint(previous), NSStringFromCGPoint(current));

    //改变位置

    CGPoint center = self.center;

    center.x += current.x - previous.x;

    center.y += current.y - previous.y;

    self.center = center;

}

 

-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

    NSLog(@"%s", __func__);

}

 

-(void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

    NSLog(@"%s", __func__);

}

 

@end