UIImagePickerController .mediaTypes 在OC Swift的不同写法

先来看最终效果

2.gif

在OC中的使用方式

    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    picker.mediaTypes =  [[NSArray alloc] initWithObjects:(NSString*)kUTTypeImage,nil];
    picker.allowsEditing = YES; // 允许简单编辑图片
    picker.delegate = self;
    [self presentViewController:picker animated:YES completion:nil];

在Swift中的使用方式

错误方式，模仿OC的写法

    picker.mediaTypes = [kUTTypeImage as String]

正确方式

    picker.mediaTypes = [UTType.image.identifier]

实例

在OC使用TZImagePickerController第三方库，这个在网上能找到很多资料，但在Swift中如何使用TZImagePickerController相关资料还是比较匮乏，下面实例，就在Swift中，如何使用TZImagePickerController这个库，来从相册中选取图片，及拍照获取图片

• 初始化TZImagePickerController

    lazy var imagePickerVc: UIImagePickerController = {
        let pickerVc = UIImagePickerController()
        pickerVc.delegate = self
        pickerVc.navigationBar.barTintColor = self.navigationController?.navigationBar.barTintColor
        pickerVc.navigationBar.tintColor = self.navigationController?.navigationBar.tintColor
        let tzBarItem = UIBarButtonItem.appearance(whenContainedInInstancesOf: [TZImagePickerController.self])
        let barItem = UIBarButtonItem.appearance(whenContainedInInstancesOf: [UIImagePickerController.self])
        let titleTextAttributes = tzBarItem.titleTextAttributes(for: .normal)
        barItem.setTitleTextAttributes(titleTextAttributes, for: .normal)
        return pickerVc
    }()

• 从相册中选取图片

        let tzImagePickerVC = TZImagePickerController(maxImagesCount: 1, columnNumber: 1, delegate: nil, pushPhotoPickerVc: true)
        tzImagePickerVC?.allowTakeVideo = false
        tzImagePickerVC?.allowTakePicture = false
        tzImagePickerVC?.allowPickingVideo = false
        tzImagePickerVC?.modalPresentationStyle = .fullScreen
//        tzImagePickerVC?.preferredLanguage = "zh-Hans"
        tzImagePickerVC?.allowPreview = false
        self.present(tzImagePickerVC!, animated: true)
      ///从相册中选取图片完成后的回调
        tzImagePickerVC!.didFinishPickingPhotosHandle = { photos,assets,isSelectOriginalPhoto in
            print("----")

        }

• 真机拍照

    private func takePhoto() {
        let authStatus = AVCaptureDevice.authorizationStatus(for: AVMediaType.video)
        if authStatus == AVAuthorizationStatus.restricted || authStatus == AVAuthorizationStatus.denied {
            let message = """
            请在iPhone的"设置-隐私-相机"中允许访问相机
"""
            let alertController = UIAlertController(title: "无法使用相机", message: message, preferredStyle: .alert)
            let cancelAction = UIAlertAction(title: "取消", style: .cancel)
            let settingAction = UIAlertAction(title: "设置", style: .default ){_ in
                UIApplication.shared.open(NSURL(string: UIApplication.openSettingsURLString)! as URL)
            }
            alertController.addAction(cancelAction)
            alertController.addAction(settingAction)

            present(alertController, animated: true)

        } else if authStatus == AVAuthorizationStatus.notDetermined {
            AVCaptureDevice.requestAccess(for: .video) { granted in
                if granted {
                    DispatchQueue.main.sync {
                        self.takePhoto()
                    }
                }
            }
        } else if PHPhotoLibrary.authorizationStatus() == PHAuthorizationStatus.denied {
            let message = """
            请在iPhone的"设置-隐私-相册"中允许访问相册
"""
            let alertController = UIAlertController(title: "无法访问相册", message: message, preferredStyle: .alert)
            let cancelAction = UIAlertAction(title: "取消", style: .cancel)
            let settingAction = UIAlertAction(title: "设置", style: .default ){_ in
                UIApplication.shared.open(NSURL(string: UIApplication.openSettingsURLString)! as URL)
            }
            alertController.addAction(cancelAction)
            alertController.addAction(settingAction)

            present(alertController, animated: true)
            
        } else if PHPhotoLibrary.authorizationStatus() == PHAuthorizationStatus.notDetermined {

            TZImageManager.default().requestAuthorization {
                self.takePhoto()
            }
        } else {
//            TZLocationManager.default().startLocation { locations in
//                self.location = locations?.first
//            } failureBlock: { error in
//                self.location = nil
//            }

            
            let sourceType = UIImagePickerController.SourceType.camera
            self.imagePickerVc.sourceType = sourceType
            self.imagePickerVc.mediaTypes = [UTType.image.identifier]

            present(self.imagePickerVc, animated: true)
        }

    }


    ///拍照完成后的回调
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        print("打印一下》》》》》")
        picker.dismiss(animated: true)
        let type = info[.mediaType]
        let image = info[.originalImage] as! UIImage

        print("打印一下》》》》》type=\(String(describing: type))")
        
    }

结尾

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