设计模式,手势识别器
target/action设计模式
类为委托方
控制器为代理方
方法为协议
//.h文件
#import <UIKit/UIKit.h>@interface TapView : UIView@property (nonatomic,assign) id target;
@property (nonatomic,assign) SEL action;@end
//视图的.m文件
#import "TapView.h"
@implementation TapView
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{//这里负责调用//外界传什么方法,我就执行什么方法,不需要知道方法到底是怎么实现的.//如果外界的方法有参数,那么这个参数一定是TapView*类型的[_target performSelector:self.action withObject:self];
}
//根视图控制器控制
//控制器的.m文件
- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view.TapView *tap1 = [[TapView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];tap1.backgroundColor = [UIColor redColor];[self.view addSubview:tap1];tap1.tag = 1001;tap1.target = self; //target=控制器tap1.action = @selector(randomColor:);//选择要触发的事件[tap1 release];}代理设计模式
控制有一些是时间点,控制器可以实现这个代理方法,以便在适应的时候做适应的事
对于一些时间点,想让我的代理对象做什么事
//代理设计模式要先写一个协议
//协议名称以类名开头加上Delegate .h文件
@protocol TapViewDelegate <NSObject>
@optional
//当视图刚开始被触摸的时候,代理方要去实现的方法.
- (void)tapViewBegan:(TapView *)tapView;
//当视图在拖动过程中,想要代理方要去实现方式
- (void)tapViewMove:(TapView *)tapView;
//当视图结束触摸的时候,代理方要去实现的方法
- (void)tapViewEnd:(TapView *)tapView;
@end
@interface TapView : UIView
@property (nonatomic,assign) id<TapViewDelegate> detegate; //设计接收协议的代理对象
@end
//.m文件 如果代理不为空,切响应了某个事件 就触发 代理一般用在时间点上
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{if (_detegate != nil && [_detegate respondsToSelector:@selector(tapViewBegan:)]){[_detegate tapViewBegan:self];}}UIImageView
//写法1:创建一个图片视图UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"2753441426829430"]];imageView.frame = self.view.bounds ;[self.view addSubview:imageView];
//写法2:创建一个gif视图
//如何让UIImageView播放多张图片,GIF动态图UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 150, 350, 350)];NSMutableArray *imageArray = [[NSMutableArray alloc] initWithCapacity:4];for (int i = 1; i <= 4; i++){NSString *imageName = [NSString stringWithFormat:@"w12%d.tiff",i];UIImage *image = [UIImage imageNamed:imageName];[imageArray addObject:image];}imageView.animationImages = imageArray;//指定需要做动画的图片imageView.animationDuration = 0.5;//设置播放的时间 速率imageView.animationRepeatCount = 0; //设置循环次数[self.view addSubview:imageView];[imageView startAnimating];//让其开始播放[imageView release]; //写法3:通过图片路径加载图片//通过文件路径来加载一个图片UIImageView *imageView1 = [[UIImageView alloc] initWithImage:[UIImage imageWithContentsOfFile:@"/Users/anhao/Desktop/2753441426829430.png"]];imageView1.frame = self.view.bounds ;[self.view addSubview:imageView1];手势识别器
//创建一个点按轻拍的手势识别对象//轻拍手势识别器,一旦识别轻拍手势,就会去执行self中的tap:方法,完全可以点一下执行多个方法!!但是我们一般不加UITapGestureRecognizer *tapG =[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap:)];tapG.numberOfTapsRequired = 2; //点几下tapG.numberOfTouchesRequired = 1;//几个手指 //创建一个旋转手势UIRotationGestureRecognizer *rogR = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotage:)];
//注意 注意啦 这个地方 UILabel 和 UIImageView必须加这句imageView.userInteractionEnabled = YES;
// [imageView addGestureRecognizer:tapG];[imageView addGestureRecognizer:rogR];[imageView release];