[ios]Gesture与scrollView分别实现图片触控

ScrollView方法


- (void)viewDidLoad
{
    [super viewDidLoad];
    self.imageView=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"Cool.jpg"]];
    NSLog(@"%@",NSStringFromCGRect(self.view.frame));

    self.scrollView.frame=self.view.frame;
    self.imageView.frame=self.scrollView.frame;
    NSLog(@"%@",NSStringFromCGRect(self.imageView.frame));
    [self.imageView setContentMode:UIViewContentModeScaleAspectFit];
    self.scrollView.delegate=self;
    [self.scrollView setMaximumZoomScale:5.0];
    [self.scrollView setMinimumZoomScale:1.0];
    [self.scrollView addSubview:self.imageView];
//    self.scrollView.contentSize=CGSizeMake(320, 1000);

// Do any additional setup after loading the view, typically from a nib.
}

#pragma mark - UIScrollViewDelegate
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
    return self.imageView;
}

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


Gesture方法

//
//  PLGestureZoomDemoVC.m
//  ZoomScrollView
//
//  Created by liu poolo on 14-4-2.
//  Copyright (c) 2014年 liu poolo. All rights reserved.
//

#import “PLGestureZoomDemoVC.h”;

@interface PLGestureZoomDemoVC (){
    UIPinchGestureRecognizer *_gst;
    float _lastScale;
    CGSize beginImageViewSize;
}

@end

@implementation PLGestureZoomDemoVC


- (void)viewDidLoad
{
    [super viewDidLoad];
    self.image=[UIImage imageNamed:@"Cool.jpg"];
    self.imageView=[[UIImageView alloc]initWithImage:self.image];
    self.imageView.center=self.view.center;
   

    [self.view addSubview:self.imageView];
    _gst=[[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGestureResponse:)];

    [self.imageView addGestureRecognizer:_gst];
    UITapGestureRecognizer *tapGtr=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGestureResponse:)];
    tapGtr.numberOfTapsRequired=2;
    [self.imageView addGestureRecognizer:tapGtr];
   
    self.imageView.userInteractionEnabled=YES;
    beginImageViewSize=self.imageView.frame.size;
   
}

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



-(void)pinchGestureResponse:(UIPinchGestureRecognizer *) pinGst{

    if(pinGst.state==UIGestureRecognizerStateBegan){
        _lastScale=pinGst.scale;
    }
    float scale=pinGst.scale/_lastScale;
    _lastScale=pinGst.scale;
    [pinGst.view setTransform:CGAffineTransformScale(pinGst.view.transform, scale, scale)];
    NSLog(@"%f",scale);
   

}

-(void)tapGestureResponse:(UITapGestureRecognizer *) tapGst{

    [tapGst.view setTransform:CGAffineTransformScale(tapGst.view.transform, beginImageViewSize.width/tapGst.view
                                                         .frame.size.width, beginImageViewSize.height/tapGst.view
                                                     .frame.size.height)];
}

@end