Objective--C UI手势

好久没做整理了,在忙起来之前赶紧把整理做好,方便自己复习和以后的使用.Fighting!

首先创建RootViewController,做好准备工作.然后在RootViewController.m文件写一个属性

@property(nonatomic,retain)UIImageView *imageView;

然后通过属性,创建视图

  self.imageView = [[UIImageViewalloc] initWithFrame:CGRectMake(100,100, 200, 200)];

  self.imageView.backgroundColor = [UIColoryellowColor];

  [self.viewaddSubview:self.imageView];

  [_imageView release];

  self.imageView.image = [UIImageimageNamed:@"1.jpg"];

  NSLog(@"%@",self.imageView);

在这做个打印,会显示userInteractionEnabled = NO,userInteractionEnabled叫做用户交互.如果用户交互没有打开,无法通过手势的方法跟它进行交互.如果不确定交互开没开,可以打印一下,没打开交互的就会显示NO;

// 打开用户交互

self.imageView.userInteractionEnabled =YES;

// 1.点击

     // 初始化方法

     UITapGestureRecognizer *tap = [[UITapGestureRecognizeralloc]initWithTarget:selfaction:@selector(tapAction:)];

    // 把手势添加到视图上

    [self.imageViewaddGestureRecognizer:tap];

    // 内存管理

    [tap release];

    // 触发方法需要点击几次,默认是1

    tap.numberOfTapsRequired =2;

    // 模拟手指

    tap.numberOfTouchesRequired =2;

// 1. 轻点的点击方法实现

- (void)tapAction:(UITapGestureRecognizer *)tap{

    NSLog(@"点击了");

}

// 2.长按

// 初始化方法

    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizeralloc] initWithTarget:selfaction:@selector(longPress:)];

    [self.imageViewaddGestureRecognizer:longPress];

    [longPress release];

    // 设置触发的最短时间

    longPress.minimumPressDuration =2;

    // 设置可移动的范围

    longPress.allowableMovement = 300;

// 2. 长按的方法实现

- (void)longPress:(UILongPressGestureRecognizer *)longPress{

    NSLog(@"长按");

    // 可以按照对应的手势状态来完成判断

    if (longPress.state ==UIGestureRecognizerStateBegan) {

        NSLog(@"开始了");

    }

}

// 3. 旋转手势

    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizeralloc] initWithTarget:selfaction:@selector(rotation:)];

    [self.imageViewaddGestureRecognizer:rotation];

    [rotation release];

// 3. 旋转手势方法实现

- (void)rotation:(UIRotationGestureRecognizer *)rotation{

    NSLog(@"旋转");

    // 图片随手势一同旋转

    self.imageView.transform =CGAffineTransformRotate(self.imageView.transform, rotation.rotation);

    rotation.rotation = 0;

    

}

 // 4. 捏合

    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizeralloc] initWithTarget:selfaction:@selector(pinchAction:)];

    [self.imageViewaddGestureRecognizer:pinch];

    [pinch release];

// 4. 捏合方法实现

- (void)pinchAction:(UIPinchGestureRecognizer *)pinch{

    NSLog(@"捏合");

    // 实现图片随手势捏合

    self.imageView.transform =CGAffineTransformScale(self.imageView.transform, pinch.scale, pinch.scale);//第一个,是以它作为图片捏合的起点

    pinch.scale = 1;

}

// 5. 拖拽

    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizeralloc] initWithTarget:selfaction:@selector(panAction:)];

    [self.imageViewaddGestureRecognizer:pan];

    [pan release];

// 5. 拖拽手势实现

- (void)panAction:(UIPanGestureRecognizer *)pan{

    NSLog(@"拖拽");

    

    // 先根据手势找到经过的点

    CGPoint point = [pan translationInView:self.imageView];

    

    // 修改视图的transform

    self.imageView.transform =CGAffineTransformTranslate(self.imageView.transform, point.x, point.y);

    [pan setTranslation:CGPointZeroinView:self.imageView];

    

}

// 6. 轻扫手势

    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizeralloc] initWithTarget:selfaction:@selector(swipeAction:)];

    [self.imageViewaddGestureRecognizer:swipe];

    [swipe release];

// 6. 轻扫手势方法实现

- (void)swipeAction:(UISwipeGestureRecognizer *)swipe{

    NSLog(@"轻扫");

    

}

  // 7. 屏幕边界手势

//     这个手势出现的最晚,7.0以后才出现

    UIScreenEdgePanGestureRecognizer *screenEdge = [[UIScreenEdgePanGestureRecognizeralloc] initWithTarget:selfaction:@selector(screenEdgeAction:)];

    screenEdge.edges = UIRectEdgeLeft;

    [self.viewaddGestureRecognizer:screenEdge];

    [screenEdge release];

// 7. 屏幕边界手势方法实现

- (void)screenEdgeAction:(UIScreenEdgePanGestureRecognizer *)screenEdge{

    NSLog(@"边界");

    // 视图背景颜色随机

    self.view.backgroundColor = [UIColorcolorWithRed:arc4random()%256/255.0green:arc4random()%256/255.0blue:arc4random()%256/255.0alpha:1];

    

}

- (void)dealloc

{

    [_imageView release];

    [super dealloc];

}

/////////////////   扩展     ////////////

 1   // 响应链

     // 成为第一响应者,不点击就弹出键盘

        [textField becomeFirstResponder];

 2   

 // "nihao":"buhao"拼接成字符串

//    NSString *str = @"\"nihao\":\"buhao\"";

//    NSLog(@"%@",str);