在viewcontroller.h

@interface MainViewController : UIViewController

@property (strong, nonatomic) IBOutlet ZoomImgView *avatorimg;

在viewcontroller.m中

_avatorimg=[[ZoomImgView alloc]initWithFrame:CGRectMake(12, 11, 50, 50)];

_avatorimg.userInteractionEnabled=YES;

_avatorimg.layer.cornerRadius=25;

_avatorimg.layer.masksToBounds=YES;

[self.avatorimg sd_setImageWithURL:[NSURL URLWithString:imagestr] placeholderImage:kPlaceImgSmall];//首页头像

self.avatorimg.layer.masksToBounds = YES;

self.avatorimg.layer.cornerRadius = 4;

[_BeijingView addSubview:self.avatorimg];

封装的图片放大的类

在ZoomImgView.h

@interface ZoomImgView : UIImageView

@property(nonatomic,strong)UIScrollView *scrollView;

@property(nonatomic,strong)UIImageView *imgView;

@end

在zoomimageview.m中

#import "ZoomImgView.h"

@implementation ZoomImgView

-(instancetype)initWithFrame:(CGRect)frame{

if ([super initWithFrame:frame]) {

[self _inteTap];

}

return self;

}

- (void)_inteTap{

self.userInteractionEnabled = YES;

//添加手势

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapBig)];

[self addGestureRecognizer:tap];

}

- (void)tapBig{

//弹出来的视图

[self creactSubView];

//放大的动画

[UIView animateWithDuration:.3 animations:^{

_imgView.frame = CGRectMake(0, (kScreenH-300)/2, kScreenW, 300);

_scrollView.backgroundColor = [UIColor blackColor];

self.hidden = YES;

}];

}

- (void)creactSubView{

_scrollView = [[UIScrollView alloc] initWithFrame:[UIScreen mainScreen].bounds];

_scrollView.showsHorizontalScrollIndicator = NO;

_scrollView.showsVerticalScrollIndicator = NO;

[self.window addSubview:_scrollView];

CGRect frame = [self convertRect:self.bounds toView:self.window];

_imgView = [[UIImageView alloc] initWithFrame:frame];

_imgView.image = self.image;

_imgView.userInteractionEnabled = YES;

//添加手势

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(smallTap)];

[_imgView addGestureRecognizer:tap];

[_scrollView addSubview:_imgView];

}

- (void)smallTap{

[UIView animateWithDuration:.3 animations:^{

_imgView.frame = self.frame;

} completion:^(BOOL finished) {

self.hidden = NO;

[_scrollView removeFromSuperview];

}];

}