#import "ViewController.h"

@interface ViewController ()
@property (nonatomic, retain) UILabel *label;
@end

@implementation ViewController

• (void)dealloc
  {
  [_label release];
  [super dealloc];
  }
• (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
  self.view.backgroundColor = [UIColor whiteColor];
  self.label = [[UILabel alloc]initWithFrame:CGRectMake(100, 300, 200, 200)];
  self.label.text = @"(●'◡'●)";
  self.label.userInteractionEnabled = YES;
  self.label.font = [UIFont systemFontOfSize:50];
  [self.view addSubview:_label];
  [_label release];
  // 轻拍手势
  // 创建轻拍手势并且绑定处理方法
  UITapGestureRecognizer *tapGR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)];
  // 轻拍次数
  tapGR.numberOfTapsRequired = 3;
  // 手指数
  tapGR.numberOfTouchesRequired = 2;
  // 把轻拍手势添加到Label上
  [self.label addGestureRecognizer:tapGR];
  [tapGR release];

// 长按手势
UILongPressGestureRecognizer *longGR = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longAction:)];
[self.label addGestureRecognizer:longGR];
[longGR release];
// 旋转手势
UIRotationGestureRecognizer *potaGR = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(potaAction:)];
[self.label addGestureRecognizer:potaGR];
[potaGR release];
// 捏合手势
UIPinchGestureRecognizer *pinGR = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinAction:)];
[self.label addGestureRecognizer:pinGR];
[pinGR release];
// 平移手势
UIPanGestureRecognizer *panGR = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];
[self.label addGestureRecognizer:panGR];
[panGR release];
// 轻扫手势
UISwipeGestureRecognizer *swipeGR = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeAction:)];
[self.view addGestureRecognizer:swipeGR];
[swipeGR release];
// 屏幕边缘轻扫;
UIScreenEdgePanGestureRecognizer *screGR = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(screenAction:)];
[self.view addGestureRecognizer:screGR];
[screGR release];

}

• (void)tapAction:(UITapGestureRecognizer *)sender
  {
  NSLog(@"轻拍");

  self.label.text = @"♥";
  self.label.font = [UIFont systemFontOfSize:100];
  }

• (void)longAction:(UILongPressGestureRecognizer *)sender
  {
  NSLog(@"长按");
  self.label.text = @"●";
  self.label.font = [UIFont systemFontOfSize:200];
  if (UIGestureRecognizerStateBegan == sender.state) {

    NSLog(@"按下");

  }
  if (UIGestureRecognizerStateEnded == sender.state) {

    NSLog(@"抬起");

  }
  if (UIGestureRecognizerStateChanged == sender.state) {

    NSLog(@"拖动");
    // 在参照视图内的位置
   self.label.center = [sender locationInView:self.view];

  }
  }

• (void)potaAction:(UIRotationGestureRecognizer *)sender
  {
  NSLog(@"旋转");
  self.label.transform = CGAffineTransformRotate(self.label.transform, sender.rotation);
  // 旋转角度清空
  sender.rotation = 0;
  }
• (void)pinAction:(UIPinchGestureRecognizer *)sender
  {
  NSLog(@"捏合");
  self.label.transform = CGAffineTransformScale(self.label.transform, sender.scale, sender.scale);
  // 比例
  sender.scale = 1;
  }
• (void)panAction:(UIPanGestureRecognizer *)sender
  {
  NSLog(@"平移");
  CGPoint ponit = [sender locationInView:self.view];
  self.view.backgroundColor = [UIColor colorWithRed:arc4random() % 256 / 255.0 green:arc4random() % 256 / 255.0 blue:arc4random() % 256 / 255.0 alpha:1];

}

• (void)swipeAction:(UISwipeGestureRecognizer *)sender
  {
  NSLog(@"轻扫");
  self.label.center = CGPointMake(arc4random() % 300, arc4random() % 600);
  }
• (void)screenAction:(UIScreenEdgePanGestureRecognizer *)sender
  {
  NSLog(@"屏幕边缘");
  UIScreenEdgePanGestureRecognizer *edgeGR = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(rdgeAction:)];
  edgeGR.edges = UIRectEdgeAll;
  [self.label addGestureRecognizer:edgeGR];
  [edgeGR release];

}

// 响应者链
// -> 内核 -> 系统 -> 当前APP -> 传递到最前沿的
// 在一级一级向回传, 直到遇见一个有响应能力的视图进行响应, 并且不在传
// 如所有视图都不具备响应能力, 则丢失事件
// 如有父子关系的视图, 关闭了响应能力(UserInterActionRnabled)事件,则之后的传递会被阻止, 无父子关系的视图关闭了响应能力 依然会向后传递
// UIIMagreView和UIlabel的默认响应能力是关闭的 x