iOS訪問相冊及拍照保存的實現實例

實現效果：
1、點擊訪問相冊按鈕，可以訪問系統相冊，選擇以後返回在imageView中顯示
2、點擊拍照，訪問攝像頭，實現以後保存在相冊中，返回在imageView中顯示

注意：拍照功能需要真機調試，模擬器無法實現
模擬器會有如下效果~彈出警告框

工程下載：github工程下載鏈接

下面是程序：注意此例中兩個button和UIimageView在stZ喎?/kf/ware/vc/" target="_blank" class="keylink">vcnlib2FyZNbQzO2806O7PC9wPg0KPHA+Vmlld0NvbnRyb2xsZXIuaDwvcD4NCjxwcmUgY2xhc3M9"brush:java;"> @interface ViewController : UIViewController @property (weak, nonatomic) IBOutlet UIImageView *imageShow; @end

ViewController.m

#pragma mark - 拍照並保存
- (IBAction)takePhotoAction:(id)sender {
    BOOL isCamera = [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear];
    if (!isCamera) { //若不可用，彈出警告框
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@無可用攝像頭 message:nil delegate:self cancelButtonTitle:@確定 otherButtonTitles:nil, nil];
        [alert show];
        return;
    }
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    /**
     *      UIImagePickerControllerSourceTypePhotoLibrary  ->所有資源文件夾
            UIImagePickerControllerSourceTypeCamera        ->攝像頭
            UIImagePickerControllerSourceTypeSavedPhotosAlbum ->內置相冊
     */
    imagePicker.delegate = self;    //設置代理，遵循UINavigationControllerDelegate,UIImagePickerControllerDelegate協議
    [self presentViewController:imagePicker animated:YES completion:nil];
}

#pragma mark - 訪問相冊
- (IBAction)browseAlbum:(id)sender {
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
    imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    imagePicker.delegate = self;
    [self presentViewController:imagePicker animated:YES completion:nil];
}

#pragma mark - 協議方法的實現
//協議方法，選擇完畢以後，呈現在imageShow裡面
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    NSLog(@%@,info);  //UIImagePickerControllerMediaType,UIImagePickerControllerOriginalImage,UIImagePickerControllerReferenceURL
    NSString *mediaType = info[@UIImagePickerControllerMediaType];
    if ([mediaType isEqualToString:@public.image]) {  //判斷是否為圖片

        UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
        self.imageShow.image = image;

        //通過判斷picker的sourceType，如果是拍照則保存到相冊去
        if (picker.sourceType == UIImagePickerControllerSourceTypeCamera) {
            UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
        }
    }
//  else  當然可能是視頻，這裡不作討論~方法是類似的~
    [picker dismissViewControllerAnimated:YES completion:nil];
}

//此方法就在UIImageWriteToSavedPhotosAlbum的上方
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {
    NSLog(@已保存);
}