設定路徑
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString* path = [documentsDirectory stringByAppendingPathComponent:
[NSString stringWithString: @"test.jpg"] ];
存擋
NSData* data = UIImagePNGRepresentation(image);
[data writeToFile:path atomically:YES];
讀檔
UIImage* image = [UIImage imageWithContentsOfFile:path];
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