iOS疯狂讲解之手势识别器

#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];
// 创建一个imageView
UIImageView *imageView = [[UIImageView alloc] initWithFrame:[UIScreen mainScreen].bounds];
imageView.image = [UIImage imageNamed:@"u=2473889012,1045156706&fm=21&gp=0.jpg"];
//  UIImageView 默认交互是关闭的 ,所以需要打开
imageView.userInteractionEnabled = YES;

[self.view addSubview:imageView];
[imageView release];

// 手机识别器这个类 , 是一个抽象类
// 自己本身不实现什么具体功能
//具体功能都是由其子类来实现

// 第一个:轻拍手势
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(actionTap:)];
// 用 几个手指 轻拍
tap.numberOfTouchesRequired = 2; // 默认是1
// 轻拍的次数
tap.numberOfTapsRequired = 1; // 默认是1
// 把手势添加到要点击轻拍的视图上
[imageView addGestureRecognizer:tap];
[tap release];

/*
//第二个: 长按手势
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(actionLongPress:)];
// 最短长按时间
longPress.minimumPressDuration = 1;
// 添加到视图上
[imageView addGestureRecognizer:longPress];
[longPress release];

*/
/*
// 第三个: 旋转手势
UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(actionRotation:)];
// 添加到视图上
[imageView addGestureRecognizer:rotation];
[rotation release];
*/
/*
// 第四个: 捏合手势
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(actionPinch:)];
// 直接添加到视图上
[imageView addGestureRecognizer:pinch];
[pinch release];
*/
/*
// 第五个 平移手势
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(actionPan:)];
// 添加到视图上
[imageView addGestureRecognizer:pan];
[pan release];
*/

//    // 第六个 清扫手势
//    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(actionSwipe:)];
//    // 设置左右扫
//    swipe.direction = UISwipeGestureRecognizerDirectionLeft; // 默认是右扫
//
//    // 添加到视图上
//    [imageView addGestureRecognizer:swipe];
//    [swipe release];
// 第七个: 边缘扫 是默认的 不设置也有边缘扫
UIScreenEdgePanGestureRecognizer *screenEdgePan = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(actionScreenEdgePan:)];
//  设置从屏幕边缘 那边去扫
screenEdgePan.edges = UIRectEdgeLeft;
[imageView addGestureRecognizer:screenEdgePan];
[screenEdgePan release];

}

//1, 轻拍触发方法
- (void)actionTap:(UITapGestureRecognizer *)tap
{
NSLog(@"轻拍了");
}
// 2,长按触发方法
- (void)actionLongPress:(UILongPressGestureRecognizer *)longPress
{
// 长按 换图片
// 获取到长按的view
UIImageView *imageView = (UIImageView *)longPress.view;
imageView.image = [UIImage imageNamed:@"u=3484715933,459413563&fm=23&gp=0.jpg"];
NSLog(@"长按手势实现");
}
// 3,旋转触发方法
- (void)actionRotation:(UIRotationGestureRecognizer *)rotation
{
// transform 形变属性
// 描述一下这个方法
// 第一个参数 传入要创建那个视图的形变属性
// 第二个参数 传入 手势的弧度
rotation.view.transform = CGAffineTransformRotate(rotation.view.transform, rotation.rotation);
// 把弧度重置
rotation.rotation = 0;
NSLog(@"旋转了");
}

//4, 捏合触发方法
- (void)actionPinch:(UIPinchGestureRecognizer *)pinch
{
// 形变属性控制 捏合
// 第二个参数 按捏合的刻度比例 形变
pinch.view.transform  = CGAffineTransformScale(pinch.view.transform, pinch.scale, pinch.scale);
// 重置刻度比例
pinch.scale = 1;
NSLog(@"捏合手势");
}

// 5. 平移触发方法
- (void)actionPan:(UIPanGestureRecognizer *)pan
{
// 这个点 以手指触摸到屏幕那一刻 即为0,0点
CGPoint p = [pan translationInView:pan
.view];
NSLog(@"%@", NSStringFromCGPoint(p));
pan.view.transform = CGAffineTransformTranslate(pan.view.transform, p.x, p.y);
// 重置 点 让他以为每次都是刚开始触发
[pan setTranslation:CGPointMake(0, 0) inView:pan.view];

//[pan translationInView:self.view];
}

// 6. 左右扫触发方法
- (void)actionSwipe:(UISwipeGestureRecognizer *)swipe
{
NSLog(@"左扫了");

}

// 7. 边缘扫触发方法
- (void)actionScreenEdgePan:(UIScreenEdgePanGestureRecognizer *)screenEdgePan
{
// 刚一扫就触发
if (screenEdgePan.state == UIGestureRecognizerStateBegan) {
NSLog(@"边缘扫 左扫");
}

}