iOS事件:触摸事件.运动事件.远程控制事件

iOS中,提供了事件处理:触摸事件,运动事件,远程控制事件.这很大得方便程序猿的工作.

这里先简单做个介绍:

//
//  ViewController.m
//  demo
//
//  Created by shaoting on 15/11/23.
//  Copyright © 2015年 9elephas. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
/**
 *  IOS事件分类:1,触摸事件2,运动事件3,远程控制事件
 1.触摸事件:触碰屏幕
 2.运动事件:通过加速器触发(如晃动手机)
 3.远程控制事件:通过其他设备远程控制(如蓝牙)
 在iOS中,只有继承自UIResponder类的对象才能触发事件
 */
- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"iOS事件";
    self.view.backgroundColor = [UIColor whiteColor];
    //开个图
    UIImage * image = [UIImage imageNamed:@"屏幕快照 2015-11-23 17.37.19"];
    self.imageView = [[UIImageView  alloc]initWithFrame:CGRectMake(20, 20, 150, 300)];
    self.imageView.image = image;
    [self.view setBackgroundColor:[UIColor colorWithPatternImage:image]]; //view的背景色使用image
    [self.view addSubview:_imageView];
}
//触摸事件
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    NSLog(@"一根手指或多根手指触摸时触发");
    UITouch * touch = [touches anyObject]; //获得任意触摸对象
    NSLog(@"触摸对象%@",touch);
    CGPoint current = [touch locationInView:self.view];//获得当前的触摸对象
    NSLog(@"当前的触摸对象%@",NSStringFromCGPoint(current));  //把CGPoint对象转换为字符串对象
}
-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    NSLog(@"一根或者多根手指离开屏幕时触发");
}
//以图片随鼠标移动为例
-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    NSLog(@"一根或者多根手指移动时触发");
    UITouch * touch = [touches anyObject];
    CGPoint current = [touch locationInView:self.view];//当前位置
    CGPoint previous = [touch previousLocationInView:self.view];//当前位置的前一个位置
    CGPoint center = _imageView.center;//移动前的中心位置
    CGPoint offset = CGPointMake(current.x - previous.x, current.y - previous.y);
    _imageView.center = CGPointMake(center.x+offset.x, center.y+offset.y);
    NSUInteger count = touch.tapCount;//短时间内点击的次数
    NSLog(@"短时间内点击的次数%ld",count);
    UITouchPhase phase = touch.phase;//触摸周期内的各个状态
    NSLog(@"触摸周期内的各个状态%ld",phase);
    NSTimeInterval  tamp = touch.timestamp;//触摸产生或者变化的时间戳
    NSLog(@"触摸产生或者变化的时间戳%f",tamp);
    UIView * view = touch.view; //触摸时所在的视图
    NSLog(@"触摸时所在的视图%@",view);
    UIWindow * window = touch.window;//触摸时所在的window
    NSLog(@"触摸时所在的window%@",window);
}
//运动事件
-(void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event{
    NSLog(@"运动开始时触发");
}
-(void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event{
    NSLog(@"运动结束时触发");
}
-(void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event{
    NSLog(@"运动被意外取消时触发");
}
//远程控制事件
-(void)remoteControlReceivedWithEvent:(UIEvent *)event{
    NSLog(@"接收到远程控制消息时执行");
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

其中,模拟器开启晃动手机的功能键是:

触摸事件:

//
//  ViewController.m
//  demo1
//
//  Created by shaoting on 15/11/23.
//  Copyright © 2015年 9elephas. All rights reserved.
//

#import "ViewController.h"
#define Hight [UIScreen mainScreen].bounds.size.height-49
#define Width [UIScreen mainScreen].bounds.size.width

@interface ViewController ()<UIGestureRecognizerDelegate>{
    int _count;
}
@end

@implementation ViewController
/**
 *  复杂手势:6种
 点按手势:UITapGestureRecognizer
 捏合手势:UIPinchGestureRecognizer
 拖动手势:UIPanGetureRecognizer
 清扫手势:UISwipeGetureRecognizer
 旋转手势:UIRotationGetureReconizer
 长按手势:UILongPressGetureReconizer
 6种手势中点按手势属于离散型手势(不用判断状态),其余手势属于连续手势(除清扫手势外均需要判断状态).
 
 各手势的触发时机:点按事件:点击屏幕然后松开时触发
                  长按事件:长时间点击屏幕不松开即会触发(不加长按&拖动冲突解决),长时间点击屏幕松开即会触发(加长按&拖动手势冲突解决ß)
                  拖动事件:手指在屏幕上拖动时触发
                  旋转手势:手指在屏幕上旋转时触发
                  清扫手势:只在清扫完毕(手指清扫屏幕离开屏幕时)才会触发
                  捏合手势:手指捏合时触发
 
 事件冲突:点击手势会和旋转手势会发生冲突.
          清扫手势会和拖动手势会发生冲突.
 
 
 */
- (void)viewDidLoad {
    [super viewDidLoad];
    [self initLayout];
    [self addGesture];
    
    
    // Do any additional setup after loading the view, typically from a nib.
}
//布局
-(void)initLayout{
    _imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 49, Width, Hight)];
    _imageView.userInteractionEnabled = YES;   //必须设置为YES,否则无法就收手势操作
    UIImage * image = [UIImage imageNamed:@"0"];
    _imageView.image = image;
    self.title = @"0";
    [self.view addSubview:_imageView];
}
//添加手势
-(void)addGesture{
    UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap:)];
    tap.numberOfTapsRequired = 1; //设置点击次数,默认为1
    tap.numberOfTouchesRequired = 1;//设置为手指数
    [self.view addGestureRecognizer:tap];//添加手势进视图控制器上的视图
    
    UIPinchGestureRecognizer * pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)];
    [self.view addGestureRecognizer:pinch];
    
    UIPanGestureRecognizer * pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pan:)];
    [self.view addGestureRecognizer:pan];
    
    UISwipeGestureRecognizer * left = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipe:)];
    left.direction = UISwipeGestureRecognizerDirectionLeft;
    [self.view addGestureRecognizer:left];
    UISwipeGestureRecognizer * right = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipe:)];
    right.direction = UISwipeGestureRecognizerDirectionRight;
    [self.view addGestureRecognizer:right];
    
    UIRotationGestureRecognizer * rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotation:)];
    [self.view addGestureRecognizer:rotation];
    
    UILongPressGestureRecognizer * longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];
    [self.view addGestureRecognizer:longPress];

    
    //手势冲突解决
    [pan requireGestureRecognizerToFail:left];
    [pan requireGestureRecognizerToFail:right];//解决拖动手势和清扫手势的冲突
    [longPress requireGestureRecognizerToFail:pan];//解决长按手势和拖动手势的冲突
    
    
    //多种手势在不同视图上的同时执行
    //iOS默认只会触发一次,因为触发是沿着响应者链依次匹配,只要匹配到响应就会停止.可以修改- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer的返回值,默认返回NO
    //上面演示了添加长按手势进视图控制器视图上,下面再添加长按手势到_imageView上,让这两个手势可以同时在不同视图上执行.
    UILongPressGestureRecognizer * longpress1 = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress1:)];
    longpress1.delegate = self;
    [_imageView addGestureRecognizer:longpress1];
    
}
//点按事件
//点按是否显示状态栏
-(void)tap:(UITapGestureRecognizer *)tap{
    BOOL recognizer = !self.navigationController.navigationBarHidden;
    [self.navigationController setNavigationBarHidden:recognizer];
}
//捏合事件
//缩放图片
-(void)pinch:(UIPinchGestureRecognizer *)pinch{
//    NSLog(@"%ld",(long)pinch.state); //  捏合状态
    //状态:0--未开始   1--手势开始   2--手势进行  3--手势完成
//    typedef NS_ENUM(NSInteger, UIGestureRecognizerState) {
//        UIGestureRecognizerStatePossible,   // 尚未识别是何种手势操作（但可能已经触发了触摸事件），默认状态
//        
//        UIGestureRecognizerStateBegan,      // 手势已经开始，此时已经被识别，但是这个过程中可能发生变化，手势操作尚未完成
//        UIGestureRecognizerStateChanged,    // 手势状态发生转变
//        UIGestureRecognizerStateEnded,      // 手势识别操作完成（此时已经松开手指）
//        UIGestureRecognizerStateCancelled,  // 手势被取消，恢复到默认状态
//        
//        UIGestureRecognizerStateFailed,     // 手势识别失败，恢复到默认状态
//        
//        UIGestureRecognizerStateRecognized = UIGestureRecognizerStateEnded // 手势识别完成，同UIGestureRecognizerStateEnded
//    };
    if (pinch.state == UIGestureRecognizerStateChanged) {
        _imageView.transform = CGAffineTransformMakeScale(pinch.scale, pinch.scale); //.scele记录缩放属性
    }else if(pinch.state == UIGestureRecognizerStateEnded){ //缩放完毕后恢复
        [UIView animateWithDuration:5 animations:^{
            _imageView.transform = CGAffineTransformIdentity;//取消形变
        }];
    }
}
//拖动手势
-(void)pan:(UIPanGestureRecognizer *)pan{
   
    if (pan.state == UIGestureRecognizerStateChanged) {
        CGPoint transform = [pan translationInView:self.view];//利用translationInView:取得在相对视图中的移动
        _imageView.transform = CGAffineTransformMakeTranslation(transform.x, transform.y);
    }else if(pan.state == UIGestureRecognizerStateEnded){
        [UIView animateWithDuration:2 animations:^{
            _imageView.transform = CGAffineTransformIdentity;
        }];
    }
}

//清扫手势
-(void)swipe:(UISwipeGestureRecognizer *)swipe{
  //因为清扫手势虽然是连续手势,但是只有在清扫完毕时才会触发,所以不用判断状态
    if (swipe.direction == UISwipeGestureRecognizerDirectionRight) {
        [self nextImage];
    }
    if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) {
        [self lastImage];
    }
}
-(void)nextImage{
    int index=(_count+2+1)%2;
    NSString *imageName=[NSString stringWithFormat:@"%i",index];
    _imageView.image=[UIImage imageNamed:imageName];
    _count=index;
    [self showName];
}
-(void)lastImage{
    int index=(_count+2-1)%2;
    NSString *imageName=[NSString stringWithFormat:@"%i",index];
    _imageView.image=[UIImage imageNamed:imageName];
    _count=index;
    [self showName];

}
-(void)showName{
    NSString * name = [NSString stringWithFormat:@"%i",_count];
    self.title  = name;
}
//旋转事件
//旋转使图片旋转
-(void)rotation:(UIRotationGestureRecognizer *)rotation{
    if (rotation.state == UIGestureRecognizerStateChanged) {
        _imageView.transform = CGAffineTransformMakeRotation(rotation.rotation);// .rotation记录了改变的弧度
    }else if(rotation.state == UIGestureRecognizerStateEnded){
        [UIView animateWithDuration:2 animations:^{
            _imageView.transform = CGAffineTransformIdentity;
        }];
    }
}
//长按事件
-(void)longPress:(UILongPressGestureRecognizer *)longPress{
    //长按选择是否下载图片
    if (longPress.state == UIGestureRecognizerStateBegan) {
        UIAlertController * alterC = [UIAlertController alertControllerWithTitle:@"提示" message:@"是否下载该图片" preferredStyle:UIAlertControllerStyleActionSheet];
        UIAlertAction * cance = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
        UIAlertAction * down = [UIAlertAction actionWithTitle:@"下载" style:UIAlertActionStyleDefault handler:nil];
        [alterC addAction:cance];
        [alterC addAction:down];
        [self presentViewController:alterC animated:YES completion:nil];
        
    }
}
-(void)longPress1:(UILongPressGestureRecognizer *)longpress{
    NSLog(@"添加手势进_imageView");
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    if ([otherGestureRecognizer.view isKindOfClass:[self.view class]]) {//如果是控制器视图则继续沿着响应者链传播
        return YES;
    }
    return NO;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

运动事件:

监听运动事件对于UI控件有个前提就是监听对象必须是第一响应者（对于UIViewController视图控制器和UIAPPlication没有此要求）。这也就意味着如果监听的是一个UI控件那么-(BOOL)canBecomeFirstResponder;方法必须返回YES。同时控件显示时（在-(void)viewWillAppear:(BOOL)animated;事件中）调用视图控制器的becomeFirstResponder方法。当视图不再显示时（在-(void)viewDidDisappear:(BOOL)animated;事件中）注销第一响应者身份。(是真的吗?)

//
//  ViewController.m
//  demo2
//
//  Created by shaoting on 15/11/25.
//  Copyright © 2015年 9elephas. All rights reserved.
//

#import "ViewController.h"

@interface ViewController (){
    UIImageView * _imageView;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
     _imageView = [[UIImageView alloc]initWithFrame:[UIScreen mainScreen].bounds];
    _imageView.image = [UIImage imageNamed:@"1"];
    [self.view addSubview:_imageView];
}

#pragma mark 运动开始
-(void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event{
    NSLog(@"运动开始了");
    //这里只处理摇晃事件
    if (motion==UIEventSubtypeMotionShake) {
        _imageView.image=[self getImage];
    }
}
#pragma mark 运动结束
-(void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event{
    NSLog(@"运动结束了");
}
-(UIImage *)getImage{
    int index= arc4random()%2;
    NSString *imageName=[NSString stringWithFormat:@"%i",index];
    UIImage *image=[UIImage imageNamed:imageName];
    return image;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

远程控制事件:

这里有点问题,以后再写吧.