PhotoView 实现与图片进行简单的交互

/** 显示的图片，提供给外界调用，用于保存图片 */
@property (strong, nonatomic) UIImageView *imageView;/** 加载网络图片 */
+ (instancetype)photoViewWithFrame:(CGRect)frame atImageUrlString:(NSString *)urlString;
- (instancetype)initWithFrame:(CGRect) frame atImageUrlString:(NSString *)urlString;/** 加载本地图片 */
+ (instancetype)photoViewWithFrame:(CGRect)frame atImageName:(NSString *)imageName;
- (instancetype)initWithFrame:(CGRect)frame atImageName:(NSString *)imageName;

- (void)setupImageOfURLString:(NSString *)urlString { /** 取得沙盒路径 */
NSString *cachesDirectory = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject]; /** 取得图片名 */
NSString *imageName = [[urlString lastPathComponent] stringByDeletingPathExtension]; /** 取得图片扩展名 */
NSString *imageExtension = [urlString pathExtension]; /** 先从沙盒中取出图片 */
UIImage *image = [UIImage loadImage:imageName ofType:imageExtension inDirectory:cachesDirectory]; /** 当图片不存在 */
if (!image) { NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:urlString]]; image = [UIImage imageWithData:data]; /** 下载图片后存储到沙盒中 */
[image saveImage:image atFileName:imageName atImageType:imageExtension atDirectory:cachesDirectory];
} self.imageView.image = image;}

- (void)viewDidLoad {
[super viewDidLoad]; NSString *urlString = @"http://ww4.sinaimg.cn/large/7a8aed7bgw1ev1yplngebj20hs0qogq0.jpg"; /** 加载网络图片 */
XQPhotoView *photoView = [XQPhotoView photoViewWithFrame:self.view.bounds atImageUrlString:urlString]; /** 加载本地图片 */
// XQPhotoView *photoView = [XQPhotoView photoViewWithFrame:self.view.bounds atImageName:@"7a8aed7bgw1euqcfwjbkdj20hs0qo40w.jpg"]; [self.view addSubview:photoView];
}