[IOS笔记]图片缩放-只在真机上有效

////  ViewController.m//  内容缩放////  Created by cdj on 17/9/10.//  Copyright © 2017年 ue. All rights reserved.//#import "ViewController.h"@interface ViewController () <UIScrollViewDelegate>@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;@property (nonatomic, weak) UIImageView *gImageView;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    UIImage *image = [UIImage imageNamed:@"minion"];    UIImageView *imageView = [[UIImageView alloc] initWithImage:image];        [self.scrollView addSubview:imageView];    self.gImageView = imageView;        self.scrollView.contentSize = image.size;        self.scrollView.delegate = self;    //    设置缩放比例    self.scrollView.maximumZoomScale = 2.0;    self.scrollView.minimumZoomScale = 0.5;}/** *  返回需要缩放的子控件（scrollView的子控件） * *  @param scrollView <#scrollView description#> * *  @return <#return value description#> */-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{        NSLog(@"viewForZoomingInScrollView");    return self.gImageView;}-(void)scrollViewDidZoom:(UIScrollView *)scrollView{    NSLog(@"正在缩放");}@end