ios手势

一、以下为移动、缩放、旋转、点击手势：

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UIGestureRecognizerDelegate>

@property (weak, nonatomic) IBOutlet UIImageView *imageView;
@property (nonatomic) CGFloat lastScal;
@property (nonatomic) CGFloat _x;
@property (nonatomic) CGFloat _y;
@property (nonatomic) CGFloat _lastRotation;

@end

 

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize imageView;
@synthesize lastScal,_x,_y,_lastRotation;

- (void)viewDidLoad
{
    [super viewDidLoad];
	//缩放手势
    UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(scale:)];
    [pinchRecognizer setDelegate:self];
    [self.view addGestureRecognizer:pinchRecognizer];
    
    //移动手势
    UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(move:)];
    [panRecognizer setMinimumNumberOfTouches:1];
    [panRecognizer setMaximumNumberOfTouches:1];
    [panRecognizer setDelegate:self];
    [self.view addGestureRecognizer:panRecognizer];
    
    //旋转
    UIRotationGestureRecognizer *rotationRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotate:)];
    [rotationRecognizer setDelegate:self];
    [self.view addGestureRecognizer:rotationRecognizer];
    
    //点击
    imageView.userInteractionEnabled = YES;
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(click:)];
    [imageView addGestureRecognizer:tap];
}

//缩放
- (void)scale:(id)sender{
    [self.view bringSubviewToFront:[(UIPinchGestureRecognizer *)sender view]];
    //当手指离开屏幕时，将lastScale设置为1.0
    if ([(UIPinchGestureRecognizer *)sender state] == UIGestureRecognizerStateEnded) {
        lastScal = 1.0;
        return;
    }
    CGFloat sa = 1.0-(lastScal-[(UIPinchGestureRecognizer *)sender scale]);
    CGAffineTransform currentTransform = [(UIPinchGestureRecognizer *)sender view].transform;
    CGAffineTransform newTransform = CGAffineTransformScale(currentTransform, sa, sa);
    [[(UIPinchGestureRecognizer *)sender view] setTransform:newTransform];
    lastScal = [(UIPinchGestureRecognizer *)sender scale];
    NSLog(@"lastScal : %f",lastScal);
}

//移动
-(void)move:(id)sender{
    CGPoint translatedPoint = [(UIPanGestureRecognizer *)sender translationInView:self.view];
    if ([(UIPanGestureRecognizer *)sender state]==UIGestureRecognizerStateBegan) {
        _x = [imageView center].x;
        _y = [imageView center].y;
    }
    translatedPoint = CGPointMake(_x+translatedPoint.x, _y+translatedPoint.y);
    [imageView setCenter:translatedPoint];
}

// 旋转
-(void)rotate:(id)sender {
    if([(UIRotationGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
        _lastRotation = 0.0;
        return;
    }
    CGFloat rotation = 0.0 - (_lastRotation - [(UIRotationGestureRecognizer*)sender rotation]);
    CGAffineTransform currentTransform = imageView.transform;
    CGAffineTransform newTransform = CGAffineTransformRotate(currentTransform,rotation);
    [imageView setTransform:newTransform];
    _lastRotation = [(UIRotationGestureRecognizer*)sender rotation];
}

//点击
- (void)click:(id)sender{
    NSLog(@"click....");
}

//手势代理方法
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    NSLog(@"gestureRecognizer...");
    return ![gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

@end

 

二、以下为禁止侧滑返回：

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    // 禁用返回手势
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = NO;
    }
}

- (void) viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    //开启返回手势，解决侧滑返回时需跳到指定页面
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = YES;
    }
}