IOS保存图片到本地

转载自：http://blog.csdn.net/hengshujiyi/article/details/22879495
NSString *data = [arguments objectAtIndex0];
UIImage *image = [UIImage imageWithData:[GTMBase64 decodeString:data]];
// UIImageWriteToSavedPhotosAlbum(image, nil,nil,nil);
UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);
[SVProgressHUD show];

// 指定回调方法
- (void)image: (UIImage *) image didFinishSavingWithError: (NSError *) error contextInfo: (void *) contextInfo{
[SVProgressHUD dismiss];
NSString *msg = nil ;
if(error != NULL){
msg = @"保存失败,请在'设置->隐私->照片'中开启应用访问照片的权限";
}else{
msg = @"保存成功";
}
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示"
message:msg
delegate:self
cancelButtonTitle:@"确定"
otherButtonTitles:nil];
[alert show];
[alert release];

}