ios - 在 UIImagePickerController 中添加左 UIBarButton

Question

我想在 .PhotoLibrary 我的左侧栏项目中添加一个相机选项我的代码如下所示，但它们不起作用。

let picker = UIImagePickerController()

let camera = UIBarButtonItem(barButtonSystemItem: .Camera, target: self, action: Selector("btnOpenCamera"))
picker.navigationItem.leftBarButtonItem = camera

picker.allowsEditing = true
picker.sourceType = .PhotoLibrary
picker.delegate = self

presentViewController(picker, animated: true, completion: nil)

Answer 1

您不能按照现在的方式执行此操作，因为没有 UINavigationController 到 UIImagePickerController。为此，您必须在您的类中添加 UIInavigationControllerDlegate 方法。

将此方法添加到您的 viewController

 func navigationController(navigationController: UINavigationController, willShowViewController viewController: UIViewController, animated: Bool) {
        print("m in")

   viewController.navigationItem.title = "Home"
   let camera = UIBarButtonItem(title: "camera", style: .Plain, target:self, action:  "btnOpenCamera")
    viewController.navigationItem.leftBarButtonItem = camera

输出是这样的: