關(guān)于 iOS 相冊(cè)選取和拍照

需要注意的是需要現(xiàn)在plist 文件中加入以下2個(gè)屬性
①.Privacy - Photo Library Usage Description
②.Privacy - Camera Usage Description
遵循2個(gè)代理方法
UIImagePickerControllerDelegate
UINavigationControllerDelegate

1.攝像頭

        //是否是攝像頭
        BOOL isCamera = [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear];
        if (!isCamera) { //若不可用，彈出警告框
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"無(wú)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(nèi)置相冊(cè)
         */
        
//設(shè)置代理，遵循UINavigationControllerDelegate,UIImagePickerControllerDelegate協(xié)議
        imagePicker.delegate = self;
        [self presentViewController:imagePicker animated:YES completion:nil];

2.訪問(wèn)相冊(cè)

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
        imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
        imagePicker.delegate = self;
        [self presentViewController:imagePicker animated:YES completion:nil];

3.代理方法

#pragma mark - 協(xié)議方法的實(shí)現(xiàn)
//協(xié)議方法，選擇完畢以后，顯示在 cell 里面
- (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];
   
        imageCell.imageView.image = image;
        
        //通過(guò)判斷picker的sourceType，如果是拍照則保存到相冊(cè)去
        if (picker.sourceType == UIImagePickerControllerSourceTypeCamera) {
            UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
        }
    }
    [picker dismissViewControllerAnimated:YES completion:nil];
}

- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo {
    NSLog(@"已保存");
}