iOS开发之常见手势(敲击/旋转/捏合/长按/轻扫/混合等)

手势在iOS开发应用中并不算少见,但是应用的时候往往没报错,但是触发却没有效果,现在简单整理下.

demo演示

1.所有的手势代理,都是

Paste_Image.png

2.如果是图片使用手势,记得允许图片可以交互作用

Paste_Image.png

3.敲击手势

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self.view setBackgroundColor:[UIColor whiteColor]];
    self.title = @"敲击手势";
    
    self.imgView = [[UIImageView alloc]initWithFrame:CGRectMake(20, 100, 300, 200)];
    [self.imgView setImage:[UIImage imageNamed:@"img"]];
    [self.view addSubview:self.imgView];
    
    //图片允许交互,别忘记设置,否则手势没有反应
    [self.imgView setUserInteractionEnabled:YES];
    
    //1.创建一个"敲击手势"对象
    UITapGestureRecognizer *tapGest = [[UITapGestureRecognizer alloc]init];
    
    //2.设置敲击次数
    tapGest.numberOfTapsRequired = 1;
    
    //3.手指头数量,默认不写
//    tapGest.numberOfTouchesRequired = 2;
    
    //4.代理
    tapGest.delegate =self;
    
    //5.手势添加到View
    [self.imgView addGestureRecognizer:tapGest];
    
    //6.手势监听方法
    [tapGest addTarget:self action:@selector(tapGestMethod:)];
}

/**
 *  监听方法
 */
-(void)tapGestMethod:(UITapGestureRecognizer *)tapGest{

    NSLog(@"可以点击了:%s",__func__);
}

/**
 *  手势代理 (实现view只能左边点击,右边无效)
 */
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{

    CGPoint location = [touch locationInView:touch.view];
    if (location.x<= touch.view.bounds.size.width/2) {
        
        return YES;
    }
    return NO;
}

4.长按手势

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self.view setBackgroundColor:[UIColor whiteColor]];
    self.title = @"长按手势";
    
    self.imgView = [[UIImageView alloc]initWithFrame:CGRectMake(20, 100, 80, 80)];
    [self.imgView setImage:[UIImage imageNamed:@"img"]];
    [self.view addSubview:self.imgView];
    
    //图片允许交互,别忘记设置,否则手势没有反应
    [self.imgView setUserInteractionEnabled:YES];
    
    //初始化一个长按手势
    UILongPressGestureRecognizer *longPressGest = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressView:)];
    
    //长按等待时间
    longPressGest.minimumPressDuration = 3;
    
    //长按时候,手指头可以移动的距离
    longPressGest.allowableMovement = 30;
    [self.imgView addGestureRecognizer:longPressGest];
}

-(void)longPressView:(UILongPressGestureRecognizer *)longPressGest{

    NSLog(@"%ld",longPressGest.state);
    if (longPressGest.state==UIGestureRecognizerStateBegan) {
       
        NSLog(@"长按手势开启");
    } else {
        NSLog(@"长按手势结束");
    }
    
}

5.旋转手势

- (void)viewDidLoad {
    [super viewDidLoad];
   
    [self.view setBackgroundColor:[UIColor whiteColor]];
    self.title = @"旋转手势";
    
    self.imgView = [[UIImageView alloc]initWithFrame:CGRectMake(80, 100, 160, 160)];
    [self.imgView setImage:[UIImage imageNamed:@"img"]];
    [self.view addSubview:self.imgView];
    
    //图片允许交互,别忘记设置,否则手势没有反应
    [self.imgView setUserInteractionEnabled:YES];
    
    
    //初始化一个旋转手势
    UIRotationGestureRecognizer *rotationGest = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationView:)];
    [self.imgView addGestureRecognizer:rotationGest];
}

-(void)rotationView:(UIRotationGestureRecognizer *)rotationGest{

    //旋转角度.也是一个累加过程
    NSLog(@"%f",rotationGest.rotation);
    
    //设置图片旋转
    self.imgView.transform = CGAffineTransformRotate(self.imgView.transform, rotationGest.rotation);

    //清除旋转角度累计
    rotationGest.rotation = 0;
}

.6.拖拽手势

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor whiteColor]];
    self.title = @"拖拽手势";
    
    self.imgView = [[UIImageView alloc]initWithFrame:CGRectMake(20, 100, 80, 80)];
    [self.imgView setImage:[UIImage imageNamed:@"img"]];
    [self.view addSubview:self.imgView];
    
    //图片允许交互,别忘记设置,否则手势没有反应
    [self.imgView setUserInteractionEnabled:YES];
    
    
    //初始化一个拖拽手势
    UIPanGestureRecognizer *panGest = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panView:)];
    [self.imgView addGestureRecognizer:panGest];
}

-(void)panView:(UIPanGestureRecognizer *)panGest{

    //拖拽的距离(距离是一个累加)
    CGPoint trans = [panGest translationInView:panGest.view];
    NSLog(@"%@",NSStringFromCGPoint(trans));
    
    //设置图片移动
    CGPoint center =  self.imgView.center;
    center.x += trans.x;
    center.y += trans.y;
    self.imgView.center = center;
    
    //清除累加的距离
    [panGest setTranslation:CGPointZero inView:panGest.view];
}

7.轻扫手势

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor whiteColor]];
    self.title = @"轻扫手势";
    
    self.imgView = [[UIImageView alloc]initWithFrame:CGRectMake(20, 100, 300, 200)];
    [self.imgView setImage:[UIImage imageNamed:@"img"]];
    [self.view addSubview:self.imgView];
    
    //图片允许交互,别忘记设置,否则手势没有反应
    [self.imgView setUserInteractionEnabled:YES];

    
    //手势有四个方向,根据需要选择
    //UISwipeGestureRecognizerDirectionRight 向右轻扫
    //UISwipeGestureRecognizerDirectionLeft    向左轻扫
    //UISwipeGestureRecognizerDirectionUp    向上
    //UISwipeGestureRecognizerDirectionDown 向下
    
    //初始化一个轻扫手势
    UISwipeGestureRecognizer *swipeGest = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeView:)];
    [self.imgView addGestureRecognizer:swipeGest];
}

-(void)swipeView:(UISwipeGestureRecognizer *)swipeGest{

    NSLog(@"手势状态:%ld",swipeGest.state);
    
    //如何判断开始和跟结束
}

8.捏合手势(放大/缩小)

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor whiteColor]];
    self.title = @"捏合手势";
    
    self.imgView = [[UIImageView alloc]initWithFrame:CGRectMake(20, 100, 300, 200)];
    [self.imgView setImage:[UIImage imageNamed:@"img"]];
    
    //图片允许交互,别忘记设置,否则手势没有反应
    [self.imgView setUserInteractionEnabled:YES];

    
    UIPinchGestureRecognizer *pinTap = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinView:)];
    [self.imgView addGestureRecognizer:pinTap];
    
    [self.view addSubview:self.imgView];
}

-(void)pinView:(UIPinchGestureRecognizer *)pinGest{

    //缩放的比例是一个"累加"过程
    NSLog(@"%s----%f",__func__,pinGest.scale);
    
#warning 放大图片后， 再次缩放的时候，马上回到原先的大小
    //self.imageView.transform = CGAffineTransformMakeScale(pinGest.scale, pinGest.scale);
    
    
    self.imgView.transform = CGAffineTransformScale(self.imgView.transform, pinGest.scale, pinGest.scale);
    
    // 让比例还原，不要累加
    // 解决办法，重新设置scale
    pinGest.scale = 1;
}

9.旋转+捏合+拖拽

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor whiteColor]];
    self.title = @"旋转+捏合+拖拽";
    
    self.imgView = [[UIImageView alloc]initWithFrame:CGRectMake(20, 100, 300, 200)];
    [self.imgView setImage:[UIImage imageNamed:@"img"]];
    [self.view addSubview:self.imgView];
    //图片允许交互,别忘记设置,否则手势没有反应
    [self.imgView setUserInteractionEnabled:YES];
    
    
    //默认情况下,控件只能监听一种手势
    //如果要监听到多个手势,设置代理方法,告知允许多个手势存在
    
    //旋转
    UIRotationGestureRecognizer *rotaitonGest = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationView:)];
    rotaitonGest.delegate =self;
    [self.imgView addGestureRecognizer:rotaitonGest];
    
    //捏合
    UIPinchGestureRecognizer *pinchGest = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchView:)];
    [self.imgView addGestureRecognizer:pinchGest];
    
    //拖拽
    UIPanGestureRecognizer *panGest = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panView:)];
    [self.imgView addGestureRecognizer:panGest];
}

-(void)rotationView:(UIRotationGestureRecognizer *)rotationGest{
    
    //旋转角度
    //旋转的角度也一个累加的过程
    NSLog(@"旋转角度 %f",rotationGest.rotation);
    
    // 设置图片的旋转
    self.imgView.transform = CGAffineTransformRotate(self.imgView.transform, rotationGest.rotation);
    
    // 清除 "旋转角度" 的累
    rotationGest.rotation = 0;
    
}

-(void)pinchView:(UIPinchGestureRecognizer *)pinchGest{
    //设置图片缩放
    
    self.imgView.transform = CGAffineTransformScale(self.imgView.transform, pinchGest.scale, pinchGest.scale);
    
    // 还源
    pinchGest.scale = 1;
}

-(void)panView:(UIPanGestureRecognizer *)panGest{
    
    //拖拽的距离(距离是一个累加)
    CGPoint trans = [panGest translationInView:panGest.view];
    NSLog(@"%@",NSStringFromCGPoint(trans));
    
    //设置图片移动
    CGPoint center =  self.imgView.center;
    center.x += trans.x;
    center.y += trans.y;
    self.imgView.center = center;
    
    //清除累加的距离
    [panGest setTranslation:CGPointZero inView:panGest.view];
}

/**
 *  多个手势同时存在的代理,不能忘记
 */
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    
    return YES;
}

9-1.允许两个或以上手势同时存在,必须设置代理,不要忘记

Paste_Image.png

下载demo:https://github.com/OwenJoe/Gesticulation.git