UI-设计模式 手势处理

1. 设计模式：

面向对象的编程核心思想：高内聚 低耦合

使用target action实现解耦

//MyButton.h文件 用UIView模拟一个按钮#import <UIKit/UIKit.h>@interface MyButton : UIView{    id _target;    SEL _action;}- (void)addMyTarget:(id)target action:(SEL)action;@end//MyButton.m文件#import "MyButton.h"@implementation MyButton-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {    [_target performSelector:_action];}- (void)addMyTarget:(id)target action:(SEL)action {    _target = target; // self    _action = action; // @selector:}@end

_target performSelector:_action : _target调用_action方法  (_action 的类型是SEL )

2. 代理模式：

先在某个类中写协议(或者建一个protocol文件)，然后在该类中调用协议的方法(调用的时候会跳到控制器)。。

再然后执行一下三步：

三步： 遵守协议(控制器遵守)---->设置代理(设置代理为控制器)---->实现方法(在控制器中实现方法)

3. UIImageView：

- (void)addAllViews {#pragma ===== 正常添加--显示图片 =====    self.backgroundColor = [UIColor whiteColor];        UIImageView *imV1 = [[UIImageView alloc] initWithFrame:CGRectMake(50, 50, 300, 200)];    UIImageView *imV = [[UIImageView alloc] initWithFrame:CGRectMake(50, 300, 300, 200)];    imV.backgroundColor = [UIColor cyanColor];    // 寻找图片的第一种格式：直接使用imageNamed    // 如果图片格式是png的，可以省略后面的.png 直接写图片的名字即可    imV.image = [UIImage imageNamed:@"1.jpeg"];            // 寻找图片的第二种格式：使用imageWithContentsOfFile    NSString *path = [[NSBundle mainBundle] pathForResource:@"2" ofType:@"jpeg"];    // 或者是：pathForResource:@"2.jpeg"  ofType:nil    imV1.image = [UIImage imageWithContentsOfFile:path];// 然后将路径赋值            #pragma ===== 动态图 =====    UIImage *img1 = [UIImage imageNamed:@"1.tiff"];    UIImage *img2 = [UIImage imageNamed:@"2.tiff"];    UIImage *img3 = [UIImage imageNamed:@"3.tiff"];    UIImage *img4 = [UIImage imageNamed:@"4.tiff"];    UIImage *img5 = [UIImage imageNamed:@"5.tiff"];    UIImage *img6 = [UIImage imageNamed:@"6.tiff"];    UIImage *img7 = [UIImage imageNamed:@"7.tiff"];    // 1. 动图需要的图片： 用animationImages---是个数组    imV.animationImages = @[img1,img2,img3,img4,img5,img6,img7];            // 动图循环次数 :animationRepeatCount    imV.animationRepeatCount = 2563456;        // 每次动图时间 duration    imV.animationDuration = 0.8;        //让动画开始的方法    [imV startAnimating];        // 动画结束//    [imV stopAnimating];        //意思是如果在图片上面加了例如button这样需要相应的东西,就一定要把imageViewde userInteractionEnabled设置为YES;    imV.userInteractionEnabled = YES; // imageView默认的userInteractionEnabled是NO,会阻断响应链    [self addSubview:imV];    [self addSubview:imV1];    }

4. 手势处理：

包括：

1> 轻拍：UITapGestureRecognizer

2> 长按：UILongPressGestureRecognizer

3> 旋转：UIRotationGestureRecognizer

4> 捏合：UIPinchGestureRecognizer

5> 屏幕边缘清扫：UIScreenEdgePanGestureRecognizer

6> 平移：UIPanGestureRecognizer

7> 清扫：UISwipeGestureRecognizer

- (void)addAllViews {    self.backgroundColor = [UIColor whiteColor];    self.img = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"1.jpeg"]];    self.img.frame = [UIScreen mainScreen].bounds;    [self addSubview:self.img];        #pragma mark=============手势：===========    #pragma----- 1. 轻拍：    /*         UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction)];    [self.img addGestureRecognizer:tap];    // 切记：切记：！！！ 要把这个userInteractionEnabled打开    // 因为imageView会阻断事件，所以在添加手势时，要把这个userInteractionEnabled打开(打开交互)    self.img.userInteractionEnabled = YES;        // 点击次数    tap.numberOfTapsRequired = 2;    //    // 同时有几个触摸点(几个指头触摸)//    tap.numberOfTouchesRequired = 2;          */    #pragma----- 2. 长按：        /*    UILongPressGestureRecognizer *lo = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longAction:)];    self.img.userInteractionEnabled = YES;    [self.img addGestureRecognizer:lo];     */        #pragma----- 3. 旋转：         /*    UIRotationGestureRecognizer *ro = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationAction:)];     self.img.userInteractionEnabled = YES;    [self.img addGestureRecognizer:ro];      */             #pragma----- 4. 捏合    /*    UIPinchGestureRecognizer *pin= [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchAction:)];    self.img.userInteractionEnabled = YES;    [self.img addGestureRecognizer:pin];     */    #pragma----- 5. 屏幕边缘清扫    /*    UIScreenEdgePanGestureRecognizer *edge = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(edgeAction)];     self.img.userInteractionEnabled = YES;    [self.img addGestureRecognizer:edge];     */    #pragma----- 6. 平移手势             UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];    self.img.userInteractionEnabled = YES;    [self.img addGestureRecognizer:pan];                 #pragma----- 7. 清扫手势    /*         UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeAction)];    swipe.direction = UISwipeGestureRecognizerDirectionLeft;    swipe.direction = UISwipeGestureRecognizerDirectionRight;     self.img.userInteractionEnabled = YES;    [self.img addGestureRecognizer:swipe];          */    }- (void)tapAction {    NSLog(@"轻拍~ ~ ~");}- (void)longAction:(UILongPressGestureRecognizer *)longG {    if (longG.state == UIGestureRecognizerStateBegan) {        // 如果不添加这个判断条件 会打印两次结果:一次是开始 一次是结束         NSLog(@"长按~ ~ ~");    }}- (void)rotationAction:(UIRotationGestureRecognizer *)sender {    self.img.transform = CGAffineTransformRotate(self.img.transform, sender.rotation);    // 把之前一次记录旋转的角度清空    [sender setRotation:0];// 清空    NSLog(@"旋转 ....");    }- (void)pinchAction:(UIPinchGestureRecognizer *)sender {    self.img.transform = CGAffineTransformScale(self.img.transform, sender.scale, sender.scale);    [sender setScale:1]; // 清空    NSLog(@"pinch.....");}- (void)edgeAction {    NSLog(@"edge....");}- (void)panAction:(UIPanGestureRecognizer *)sender {    NSLog(@"pan....");    CGPoint point = [sender translationInView:self.img];// 获取点的新信息        self.img.transform = CGAffineTransformTranslate(self.img.transform, point.x, point.y );        // 把每次保存的之前一次的移动距离清空    [sender setTranslation:CGPointZero inView:self.img];    // 每次都会回到原点再进行平移//    self.img.transform = CGAffineTransformMakeTranslation(point.x, point.y);}- (void)swipeAction {    NSLog(@"swipe....");}

View的transform的属性可以平移 旋转 缩放.....

记得需要清空上一次的记录