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目前我想从音乐库(MPMedia)中获取专辑封面并将其保存为png或jpg文件。将MPMediaItemPropertyArtwork中的图像保存到NSDocument
这里是我的代码:
UIImage *albumImage = [item valueForProperty:MPMediaItemPropertyArtwork];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *savedImagePath = [NSString stringWithFormat:@"%@/%@.png",documentsDirectory, titleWithID];
UIImage *image = albumImage;
NSData *imageData = UIImagePNGRepresentation(image);
[imageData writeToFile:savedImagePath atomically:NO];
但在NSData *imageData = UIImagePNGRepresentation(image)
过程停止我得到的错误:
[MPConcreteMediaItemArtwork CGImage]: unrecognized selector sent to instance 0x1ed33c80
显然专辑封面是CGImage
我救不了作为PNG。 有什么想法?请帮忙。