iOS瘋狂講解之手勢識別器

#import "RootViewController.h"

@interface RootViewController ()

@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColor redColor];
    // 創建一個imageView
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:[UIScreen mainScreen].bounds];
    imageView.image = [UIImage imageNamed:@"u=2473889012,1045156706&fm=21&gp=0.jpg"];
    //  UIImageView 默認交互是關閉的 ,所以需要打開
    imageView.userInteractionEnabled = YES;
    
    [self.view addSubview:imageView];
    [imageView release];
    
    // 手機識別器這個類 , 是一個抽象類
    // 自己本身不實現什麼具體功能
    //具體功能都是由其子類來實現
 
    // 第一個:輕拍手勢
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(actionTap:)];
    // 用 幾個手指 輕拍
    tap.numberOfTouchesRequired = 2; // 默認是1
    // 輕拍的次數
    tap.numberOfTapsRequired = 1; // 默認是1
    // 把手勢添加到要點擊輕拍的視圖上
    [imageView addGestureRecognizer:tap];
    [tap release];
  
    /*
    //第二個: 長按手勢
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(actionLongPress:)];
    // 最短長按時間
    longPress.minimumPressDuration = 1;
    // 添加到視圖上
    [imageView addGestureRecognizer:longPress];
    [longPress release];
    
    */
    /*
    // 第三個: 旋轉手勢
    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(actionRotation:)];
    // 添加到視圖上
    [imageView addGestureRecognizer:rotation];
    [rotation release];
    */
    /*
    // 第四個: 捏合手勢
    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(actionPinch:)];
    // 直接添加到視圖上
    [imageView addGestureRecognizer:pinch];
    [pinch release];
    */
    /*
    // 第五個 平移手勢
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(actionPan:)];
    // 添加到視圖上
    [imageView addGestureRecognizer:pan];
    [pan release];
    */
    
//    // 第六個 清掃手勢
//    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(actionSwipe:)];
//    // 設置左右掃
//    swipe.direction = UISwipeGestureRecognizerDirectionLeft; // 默認是右掃
//    
//    // 添加到視圖上
//    [imageView addGestureRecognizer:swipe];
//    [swipe release];
    // 第七個: 邊緣掃 是默認的 不設置也有邊緣掃
    UIScreenEdgePanGestureRecognizer *screenEdgePan = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(actionScreenEdgePan:)];
    //  設置從屏幕邊緣 那邊去掃
    screenEdgePan.edges = UIRectEdgeLeft;
    [imageView addGestureRecognizer:screenEdgePan];
    [screenEdgePan release];
    
    
    
    
    
    
}

//1, 輕拍觸發方法
- (void)actionTap:(UITapGestureRecognizer *)tap
{
    NSLog(@"輕拍了");
}
// 2,長按觸發方法
- (void)actionLongPress:(UILongPressGestureRecognizer *)longPress
{
    // 長按 換圖片
    // 獲取到長按的view
    UIImageView *imageView = (UIImageView *)longPress.view;
    imageView.image = [UIImage imageNamed:@"u=3484715933,459413563&fm=23&gp=0.jpg"];
    NSLog(@"長按手勢實現");
}
// 3,旋轉觸發方法
- (void)actionRotation:(UIRotationGestureRecognizer *)rotation
{
    // transform 形變屬性
    // 描述一下這個方法
    // 第一個參數 傳入要創建那個視圖的形變屬性
    // 第二個參數 傳入 手勢的弧度
    rotation.view.transform = CGAffineTransformRotate(rotation.view.transform, rotation.rotation);
    // 把弧度重置
    rotation.rotation = 0;
    NSLog(@"旋轉了");
}

//4, 捏合觸發方法
- (void)actionPinch:(UIPinchGestureRecognizer *)pinch
{
    // 形變屬性控制 捏合
    // 第二個參數 按捏合的刻度比例 形變
    pinch.view.transform  = CGAffineTransformScale(pinch.view.transform, pinch.scale, pinch.scale);
    // 重置刻度比例
    pinch.scale = 1;
    NSLog(@"捏合手勢");
}

// 5. 平移觸發方法
- (void)actionPan:(UIPanGestureRecognizer *)pan
{
    // 這個點 以手指觸摸到屏幕那一刻 即爲0,0點
    CGPoint p = [pan translationInView:pan
                 .view];
    NSLog(@"%@", NSStringFromCGPoint(p));
    pan.view.transform = CGAffineTransformTranslate(pan.view.transform, p.x, p.y);
    // 重置 點 讓他以爲每次都是剛開始觸發
    [pan setTranslation:CGPointMake(0, 0) inView:pan.view];
    
    
    //[pan translationInView:self.view];
}

// 6. 左右掃觸發方法
- (void)actionSwipe:(UISwipeGestureRecognizer *)swipe
{
    NSLog(@"左掃了");
    
    
}

// 7. 邊緣掃觸發方法
- (void)actionScreenEdgePan:(UIScreenEdgePanGestureRecognizer *)screenEdgePan
{
    // 剛一掃就觸發
    if (screenEdgePan.state == UIGestureRecognizerStateBegan) {
         NSLog(@"邊緣掃 左掃");
    }
   
}