IOS大图片处理(附源码)

ViewController.m
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(void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
//大图片滑动
UIScrollView *scrollView = [[UIScrollView alloc] init];
scrollView.frame = CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height);//设置UIScrollView的可视范围
scrollView.backgroundColor = [UIColor grayColor];//设置UIScrollView背景颜色为灰色
[self.view addSubview:scrollView];//加载UIScrollView

UIImageView *imageView = [[UIImageView alloc] init];
imageView.image = [UIImage imageNamed:@"xingkong.jpg"];
CGFloat imgW = imageView.image.size.width;//图片的宽度
CGFloat imgH = imageView.image.size.height;//图片的高度
imageView.frame = CGRectMake(0, 0, imgW, imgH);
[scrollView addSubview:imageView];

//设置UIScrollView的滚动范围（内容大小）
scrollView.contentSize = imageView.image.size;
}－