ALAssetsLibrary *library = [[ALAssetsLibrary alloc]init];  

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    [library writeImageToSavedPhotosAlbum:p_w_picpath.CGImage orientation:p_w_picpath.p_w_picpathOrientation completionBlock:^(NSURL *asSetUrl,NSError *error){  

        if (error) {  

            UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"保存圖片失敗"  

                                                           message:@"請打開 設(shè)置-隱私-照片 來進(jìn)行設(shè)置"  

                                                          delegate:nil  

                                                 cancelButtonTitle:@"確定"  

                                                 otherButtonTitles:nil, nil];  

            [alert show];  

            [alert release];  

        }else{  

            UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"保存圖片成功"  

                                                           message:nil  

                                                          delegate:nil  

                                                 cancelButtonTitle:@"確定"  

                                                 otherButtonTitles:nil, nil];  

            [alert show];  

            [alert release];  

        }  

    }];