把图片存到相册中
-(void)savaPicAction{
UIImageWriteToSavedPhotosAlbum(_imageView.image, nil, nil, nil);
UIAlertView * alert = [[UIAlertView alloc] initWithTitle:nil message:@"保存成功" delegate:self cancelButtonTitle:nil otherButtonTitles:@"确定", nil];
[alert show];
}
原文地址：http://www.cnblogs.com/longyun/p/3732517.html
