一、手势识别（点按、长按、轻扫）
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1、点击手势
在控制器view上添加一个iamgeView
#import "ViewController.h"
@interface ViewController ()<UIGestureRecognizerDelegate>
@property (weak, nonatomic) IBOutlet UIImageView *imageV;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.imageV.userInteractionEnabled = YES;
[self tapGes];
}
//1.创建点按手势
- (void)tapGes {
//1.创建点按手势
UITapGestureRecognizer *tapGes = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap:)];
//设置代理，点击右边可以触发事件，点击左边不可以
tapGes.delegate = self;
//2.添加手势
[self.imageV addGestureRecognizer:tapGes];
}
//是否允许接收手指
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
//获取当前的点.
CGPoint curP = [touch locationInView:self.imageV];
//判断点在图片的左边还是右边;
if (curP.x > self.imageV.bounds.size.width * 0.5) {
//如果在右边,返回YES;
return YES;
}else {
//否则返回NO;
return NO;
}
}
//实现点按手势方法
- (void)tap:(UITapGestureRecognizer *)tapGes {
//点击后只有UIGestureRecognizerStateEnded状态
// if (tapGes.state == UIGestureRecognizerStateBegan) {
// NSLog(@"UIGestureRecognizerStateBegan");
// }else if (tapGes.state == UIGestureRecognizerStateChanged) {
// NSLog(@"UIGestureRecognizerStateChanged");
// }else if (tapGes.state == UIGestureRecognizerStateEnded) {
// NSLog(@"UIGestureRecognizerStateEnded");
// }
NSLog(@"%s",__func__);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
#import "ViewController.h"
@interface ViewController ()<UIGestureRecognizerDelegate>
@property (weak, nonatomic) IBOutlet UIImageView *imageV;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.imageV.userInteractionEnabled = YES;
[self longPressGes];
}
//2.创建长按手势
- (void)longPressGes {
//1.创建长按手势
UILongPressGestureRecognizer *longP = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longGes:)];
//2.添加手势
[self.imageV addGestureRecognizer:longP];
}
//长按手势分状态,长按移动时,会持续调用
- (void)longGes:(UILongPressGestureRecognizer *)longP {
if (longP.state == UIGestureRecognizerStateBegan) {
NSLog(@"UIGestureRecognizerStateBegan");
}else if (longP.state == UIGestureRecognizerStateChanged) {
NSLog(@"UIGestureRecognizerStateChanged");
}else if (longP.state == UIGestureRecognizerStateEnded) {
NSLog(@"UIGestureRecognizerStateEnded");
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
#import "ViewController.h"
@interface ViewController ()<UIGestureRecognizerDelegate>
@property (weak, nonatomic) IBOutlet UIImageView *imageV;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.imageV.userInteractionEnabled = YES;
[self swipeGesture];
}
//3、轻扫手势
-(void)swipeGesture{
//添加手势
//1.创建轻扫
UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGes:)];
//默认是向右轻扫
//设置轻扫的方向
//一个轻扫手势只能对应一个方向
swipe.direction = UISwipeGestureRecognizerDirectionLeft;
//2.添加手势
[self.imageV addGestureRecognizer:swipe];
//1、再创建轻扫
UISwipeGestureRecognizer *swipe2 = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGes:)];
//默认是向右轻扫
//设置轻扫的方向
//一个轻扫手势只能对应一个方向
swipe2.direction = UISwipeGestureRecognizerDirectionRight;
//2、添加手势
[self.imageV addGestureRecognizer:swipe2];
}
//轻扫手势实现的方法
- (void)swipeGes:(UISwipeGestureRecognizer *)swipe {
if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) {
NSLog(@"UISwipeGestureRecognizerDirectionLeft");
}else if (swipe.direction == UISwipeGestureRecognizerDirectionRight) {
NSLog(@"UISwipeGestureRecognizerDirectionRight");
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
二、手势识别（拖动(平移)、缩放、旋转）
1、平移
#import "ViewController.h"
@interface ViewController ()<UIGestureRecognizerDelegate>
@property (weak, nonatomic) IBOutlet UIImageView *imageV;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.imageV.userInteractionEnabled = YES;
// [self pinchGes];
// [self rotationGes];
[self panGes];
//默认是不能够同时支持多个手势
//可以通过代理进行设置同时实现多个手势.
}
//1.平移手势
- (void)panGes {
//添加手势
//1.创建平移
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
//2.添加手势
[self.imageV addGestureRecognizer:pan];
}
//当拖动时持续调用
- (void)pan:(UIPanGestureRecognizer *)pan {
//获取偏移量
//获取的偏移量是相对于最原始的点
CGPoint transP = [pan translationInView:self.imageV];
NSLog(@"当前偏移量:%@",NSStringFromCGPoint(transP));
//self.imageV.transform = CGAffineTransformMakeTranslation(transP.x, transP.y);
self.imageV.transform = CGAffineTransformTranslate(self.imageV.transform, transP.x, transP.y);
//清0操作(不让偏移量进行累加,获取的是相对于上一次的值,每一次走的值.)
[pan setTranslation:CGPointMake(0, 0) inView:self.imageV];
}
@end
2、旋转手势
#import "ViewController.h"
@interface ViewController ()<UIGestureRecognizerDelegate>
@property (weak, nonatomic) IBOutlet UIImageView *imageV;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.imageV.userInteractionEnabled = YES;
[self rotationGes];
//默认是不能够同时支持多个手势
//可以通过代理进行设置同时实现多个手势.
}
//2.旋转手势
- (void)rotationGes {
//1.创建旋转手势
UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];
rotation.delegate = self;
//2.添加手势
[self.imageV addGestureRecognizer:rotation];
}
//当旋转手势时调用方法
- (void)rotation:(UIRotationGestureRecognizer *)rotationGes {
//获取旋转角度(已经是弧度)
//相对于最原始的弧度
CGFloat rotatinon = rotationGes.rotation;
self.imageV.transform = CGAffineTransformRotate(self.imageV.transform, rotatinon);
//清0
[rotationGes setRotation:0];
}
@end
3、捏合手势（缩放手势）
#import "ViewController.h"
@interface ViewController ()<UIGestureRecognizerDelegate>
@property (weak, nonatomic) IBOutlet UIImageView *imageV;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.imageV.userInteractionEnabled = YES;
[self pinchGes];
//默认是不能够同时支持多个手势
//可以通过代理进行设置同时实现多个手势.
}
//3.创建捏合手势（缩放手势）
- (void)pinchGes {
//添加手势
//1.创建捏合手势
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
pinch.delegate = self;
//2.添加手势
[self.imageV addGestureRecognizer:pinch];
}
//缩放手势调用的方法
- (void)pinch:(UIPinchGestureRecognizer *)pinch {
//放大, 缩小
//获取缩放比例(相对于最原始的比例)
CGFloat scale = pinch.scale;
self.imageV.transform = CGAffineTransformScale(self.imageV.transform, scale, scale);
[pinch setScale:1];
}
@end
4、同时实现多个手势
#import "ViewController.h"
@interface ViewController ()<UIGestureRecognizerDelegate>
@property (weak, nonatomic) IBOutlet UIImageView *imageV;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.imageV.userInteractionEnabled = YES;
[self pinchGes];
[self rotationGes];
//一个手势默认是不能够同时支持多个手势
//可以通过代理进行设置同时实现多个手势.
}
//是否允许同时支持多个手势
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}
//3.创建捏合手势（缩放手势）
- (void)pinchGes {
//添加手势
//1.创建捏合手势
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
pinch.delegate = self;
//2.添加手势
[self.imageV addGestureRecognizer:pinch];
}
//2.旋转手势
- (void)rotationGes {
//1.创建旋转手势
UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];
rotation.delegate = self;
//2.添加手势
[self.imageV addGestureRecognizer:rotation];
}
//当旋转手势时调用方法
- (void)rotation:(UIRotationGestureRecognizer *)rotationGes {
//获取旋转角度(已经是弧度)
//相对于最原始的弧度
CGFloat rotatinon = rotationGes.rotation;
self.imageV.transform = CGAffineTransformRotate(self.imageV.transform, rotatinon);
//清0
[rotationGes setRotation:0];
}
@end
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