我正在使用 UIImagePickerController 对相机胶卷进行试验。我已经实现了使用自定义按钮呈现相机 View (为了实现这一点，我使用了另一个带有 xib (CustomOverlayVC.swift) 的 ViewController)。所以我有:

• MainViewController.swift(+ Storyboard)

• CustomOverlayViewController.swift

• CustomOverlayView.swift (UIView)

完整代码如下

在 CustomOverlayVC 上以编程方式创建 NavBar 之后，这是目前为止的样子(也是我想要在右边实现的)

所以我的问题是:

1) 如何像第二张图片一样缩小图像选择器的 View (以方形格式拍摄图片时显示效果好？)

我试过 picker.view.frame.height -= 40 但显然它只是获取属性。

2) 如何在显示圆形 mask 的图像上添加 mask ？ (这是针对 objective-c 的解释 here 但我不知道任何 obj-c 并且无法将其成功转换为 Swift)

3) 我试图用 picker.view.backgroundColor = UIColor.redColor() 给它一个自定义背景颜色，但是，它根本不起作用。为了清楚起见，在第二个示例中，它具有浅灰色背景色。

4) 此外，即使我使用过，我创建的导航栏看起来也更宽，(我知道这是一个不同的问题，但如果能解决它，我们将不胜感激)

UINavigationBar(frame: CGRectMake(0, 0, self.view.frame.size.width, 44))

所以总结一下，我想缩小它的 View 高度，直到它变成正方形(以及拍摄正方形的照片)(第 2 张图片)，并且，在同时，有一个圆形 mask ，在圆圈外变灰(最后一张图)

我创建了一个 sample project ，下面还有完整的代码..

ViewController.swift

 class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

var picker = UIImagePickerController()


@IBAction func shootCamera(sender: AnyObject) {

    if UIImagePickerController.availableCaptureModesForCameraDevice(.Rear) != nil {
        picker = UIImagePickerController() //make a clean controller
        picker.allowsEditing = false
        picker.sourceType = UIImagePickerControllerSourceType.Camera
        picker.cameraDevice = .Front
        picker.cameraCaptureMode = .Photo
        picker.showsCameraControls = false

        picker.delegate = self

        let customViewController = CameraCustomOverlayViewController(nibName:"CameraCustomOverlayViewController",bundle: nil)
        let customView:CameraCustomOverlayView = customViewController.view as! CameraCustomOverlayView
        customView.frame = self.picker.view.frame

        picker.modalPresentationStyle = .FullScreen
        presentViewController(picker,animated: true,completion: {
            self.picker.cameraOverlayView = customView
        })

    } else { //no camera found -- alert the user.
        let alertVC = UIAlertController(
            title: "No Camera",
            message: "Sorry, this device has no camera",
            preferredStyle: .Alert)
        let okAction = UIAlertAction(
            title: "OK",
            style:.Default,
            handler: nil)
        alertVC.addAction(okAction)
        presentViewController(
            alertVC,
            animated: true,
            completion: nil)
    }
}

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
    let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage //2
    UIImageWriteToSavedPhotosAlbum(chosenImage, self,nil, nil)
}

//What to do if the image picker cancels.
func imagePickerControllerDidCancel(picker: UIImagePickerController) {
    dismissViewControllerAnimated(true, completion: nil)
}

CustomOverlayVC.swift(用于导航栏)

class CameraCustomOverlayViewController: UIViewController, UINavigationBarDelegate {

override func viewDidLoad() {
    super.viewDidLoad()

    let navigationBar = UINavigationBar(frame: CGRectMake(0, 0, self.view.frame.size.width, 44))
    navigationBar.backgroundColor = UIColor.blackColor()
    navigationBar.delegate = self;
    let navigationItem = UINavigationItem()
    navigationItem.title = "CAMERAROLL"
    let leftButton =  UIBarButtonItem(title: "Back", style:   UIBarButtonItemStyle.Plain, target: self, action: #selector(CameraCustomOverlayViewController.btn_clicked(_:)))
    let rightButton = UIBarButtonItem(title: "Save", style: UIBarButtonItemStyle.Plain, target: self, action: nil)
    navigationItem.leftBarButtonItem = leftButton
    navigationItem.rightBarButtonItem = rightButton
    navigationBar.items = [navigationItem]
    self.view.addSubview(navigationBar)
  }
}

编辑:

为了理解高度，我尝试添加彩色边框，它覆盖了整个 View 而不是 ImagePicker 对我的 View ...我想不出任何解决方法..

  picker.view.layer.borderWidth = 1
  picker.view.layer.borderColor = UIColor.redColor().CGColor

最佳答案

我从 UIImagePickerController 转移到 AVFoundation 方法来完成更多自定义相机胶卷

关于ios - CameraRoll 方形显示和圆形 mask - UIImagePickerController，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36683557/