http://blog.youkuaiyun.com/jy_sharer/article/details/51168005

转载自:  http://blog.youkuaiyun.com/jy_sharer/article/details/51168005

保存UIImage图片到Document目录：

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- (void)saveImage: (UIImage*)image { if (image != nil) { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString* path = [documentsDirectory stringByAppendingPathComponent: [NSString stringWithString: @"test.png"] ]; NSData* data = UIImagePNGRepresentation(image); [data writeToFile:path atomically:YES]; } }

从Document目录加载图片到UIImage：

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- (UIImage*)loadImage { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString* path = [documentsDirectory stringByAppendingPathComponent: [NSString stringWithString: @"test.png"] ]; UIImage* image = [UIImage imageWithContentsOfFile:path]; return image; }