iPhone开发之手势的预习—— UITapGestureRecognizer pinch捏合 longPress长按 rotation旋转

﹏ヽ暗。殇╰゛Y 2022-08-04 15:33 134阅读 0赞

新建工程，编辑控制器的.h文件如下：

//
    //  ViewController.h
    //  多媒体B
    //
    //  Created by apple on 15/9/4.
    //  Copyright (c) 2015年 LiuXun. All rights reserved.
    //
    
    #import <UIKit/UIKit.h>
    
    @interface ViewController : UIViewController
    
    @property (nonatomic, strong) UIImageView *imageView;
    @end

编辑控制器的.m文件如下：

//
    //  ViewController.m
    //  多媒体B
    //
    //  Created by apple on 15/9/4.
    //  Copyright (c) 2015年 LiuXun. All rights reserved.
    //
    
    #import "ViewController.h"
    #define  WIDTH    [UIScreen mainScreen].bounds.size.width
    #define  HEIGHT  [UIScreen mainScreen].bounds.size.height
    
    /*
     注意：当为ImageView显示图片或其他的组件添加监听的话，就让这个组件添加对应的手势子控件。
       切记：手势效果和监听只对添加对应手势对象的控件起作用
     */
    
    @interface ViewController ()
    
    @end
    
    @implementation ViewController
    
    -(void) BuildImageView
    {
        self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT)];
        [self.view addSubview:self.imageView];
    }
    
    - (void)viewDidLoad
    {
        [super viewDidLoad];
    	
        [self BuildImageView];
        
        
        // 创建点击一次的手势
        UITapGestureRecognizer *tapGR1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(addOneGirl)];
        
        [tapGR1 setNumberOfTapsRequired:1]; // 设置单击的次数
        [tapGR1 setNumberOfTouchesRequired:1]; // 设置手指的数量
        [self.view addGestureRecognizer:tapGR1];
        
        // 创建点击两次的手势
        UITapGestureRecognizer *tapGR2 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(addOneHotGirl)];
        [tapGR2 setNumberOfTapsRequired:2]; // 设置单击的次数
        [tapGR2 setNumberOfTouchesRequired:1]; // 设置手指的数量
        
        [self.view addGestureRecognizer:tapGR2];
        
        //如果不加下面的话会先调用单指单击中的处理，再调用单指双击中的处理
        [tapGR1 requireGestureRecognizerToFail:tapGR2];
        
        // 创建一个长按的手势
        UILongPressGestureRecognizer  *longPressGR = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(addOneVeryHotGirl:)];
        [self.view addGestureRecognizer:longPressGR];
        
        // 创建一个手指向上划的手势
        UISwipeGestureRecognizer *swipGPup = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(addOneMan)];
        [swipGPup setDirection:UISwipeGestureRecognizerDirectionUp];// 设置滑动方向向上
        [self.view addGestureRecognizer:swipGPup];
        
        // 创建一个手指向下划的手势
        UISwipeGestureRecognizer *swipGPdown = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(addOneHotMan)];
        [swipGPdown setDirection:UISwipeGestureRecognizerDirectionDown]; // 设置华东方向向下
        [self.view  addGestureRecognizer:swipGPdown];
        
        // 创建一个旋转的手势
        UIRotationGestureRecognizer *rotationGR = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(addOneVeryHotMan)];
        [self.view  addGestureRecognizer:rotationGR];
        
        // 创建一个捏动得手势
        UIPinchGestureRecognizer *pinchGR = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(addTwoGirls)];
        [self.view addGestureRecognizer:pinchGR];
        
    }
    
    - (void)didReceiveMemoryWarning
    {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    
    -(void) addOneGirl
    {
        self.imageView.image = [UIImage imageNamed:@"1.jpg"];
    }
    
    -(void)addOneHotGirl
    {
        self.imageView.image = [UIImage imageNamed:@"2.jpg"];
    }
    -(void)addOneVeryHotGirl:(UILongPressGestureRecognizer *)sender
    {
        if (sender.state == UIGestureRecognizerStateBegan) {
            self.imageView.image = [UIImage imageNamed:@"3.jpg"];
        }
        
    }
    -(void) addOneMan
    {
        self.imageView.image = [UIImage imageNamed:@"4.jpg"];
    }
    
    -(void) addOneHotMan
    {
      self.imageView.image = [UIImage imageNamed:@"5.jpg"];
    }
    
    -(void) addOneVeryHotMan
    {
       self.imageView.image = [UIImage imageNamed:@"6.jpg"];
    }
    
    -(void) addTwoGirls
    {
       self.imageView.image = [UIImage imageNamed:@"7.jpg"];
    }
    
    @end

运行结果如下：  
![Center][]

[Center]: /images/20220731/4e6245b0e86b47e081a79857a1d48a16.png