现在用代码：
let imagePickVC = ImagePickerViewController() imagePickVC.modalPresentationStyle = .Custom self.presentViewController(imagePickVC, animated: true, completion: nil) |
和：
class ImagePickerViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate { var selectPictureAlertController:UIAlertController var pickedImage:UIImage var attachmentIdList:[String] init(){ self.selectPictureAlertController = UIAlertController() self.pickedImage = UIImage() self.attachmentIdList = [String]() super.init(nibName: nil, bundle: nil) } required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented") } override func viewDidLoad() { super.viewDidLoad() self.view.backgroundColor = UIColor.clearColor() } override func viewWillAppear(animated: Bool) { super.viewWillAppear(animated) selectPictureAlertController = UIAlertController(title: "提示", message: "", preferredStyle: UIAlertControllerStyle.ActionSheet) let cancelAlertAction = UIAlertAction(title: "取消", style: .Cancel, handler: self.cancelImagePick(_:)) selectPictureAlertController.addAction(cancelAlertAction) let localAlbumAlertAction = UIAlertAction(title: "打开本地相册", style: UIAlertActionStyle.Default, handler:self.openLocalAlbum(_:)) selectPictureAlertController.addAction(localAlbumAlertAction) let openCameraAlertAction = UIAlertAction(title: "打开相机", style: UIAlertActionStyle.Default, handler: self.openCamera(_:)) selectPictureAlertController.addAction(openCameraAlertAction) selectPictureAlertController.modalPresentationStyle = .Custom self.presentViewController(selectPictureAlertController, animated: true, completion: nil) } |
可以显示了：
但是，最后选择图片：
结束后，去让页面消失，试了各种代码：
let parentVC = self.parentViewController gLog.verbose("self=\(self), parentVC=\(parentVC), self.selectPictureAlertController=\(self.selectPictureAlertController)") //self=<Sales_App.ImagePickerViewController: 0x7c6f1640>, parentVC=nil, self.selectPictureAlertController=<UIAlertController: 0x7d429e00> self.selectPictureAlertController.dismissViewControllerAnimated(false, completion: nil) self.dismissViewControllerAnimated(false, completion: { //self.dismissViewControllerAnimated(true, completion: nil) // SingletonRootNC().popViewControllerAnimated(true) // parentVC?.dismissViewControllerAnimated(true, completion: nil) }) // SingletonRootNC().popViewControllerAnimated(true) |
都无法让AlertAction消失了：
swift alert actionsheet dismiss
ios – Dismiss UIAlertView after 5 Seconds Swift – Stack Overflow
ios – How do I pop to RootViewController when an alert is dismissed? – Stack Overflow
swift UIAlertController dismiss
ios – How to dismiss an UIAlertController with no actions in SWIFT? – Stack Overflow
ios – How to programatically dismiss UIAlertController without any buttons? – Stack Overflow
ios – Prevent UIAlertController to dismiss – Stack Overflow
after UIImagePickerController dismiss viewcontroller
iphone – Presenting a modal view controller immediately after dismissing another – Stack Overflow
ios – DIsmissing a UIImagePickerController is also making the parent dissapear – Stack Overflow
ios – How to present UIAlertController when not in a view controller? – Stack Overflow
swift – Prevent dismissal of UIAlertController – Stack Overflow
ios – Prevent UIAlertController to dismiss – Stack Overflow
折腾了半天：
gLog.verbose("self=\(self), self.parentViewController=\(self.parentViewController), self.presentationController=\(self.presentationController), self.presentedViewController=\(self.presentedViewController), self.presentingViewController=\(self.presentingViewController), self.selectPictureAlertController=\(self.selectPictureAlertController)") //self=<Sales_App.ImagePickerViewController: 0x7c6f1640>, parentVC=nil, self.selectPictureAlertController=<UIAlertController: 0x7d429e00> //self=<Sales_App.ImagePickerViewController: 0x7c730010>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7bfc3ad0>), self.presentedViewController=Optional(<UIImagePickerController: 0x7d9a7a00>), self.presentingViewController=Optional(<UINavigationController: 0x7d152400>), self.selectPictureAlertController=<UIAlertController: 0x7e17e200> gLog.verbose("SingletonRootNC().viewControllers=\(SingletonRootNC().viewControllers)") //SingletonRootNC().viewControllers=[<Sales_App.MainViewController: 0x7b2dbe00>, <Sales_App.CustomerDetailViewController: 0x7aa7fa00>] //SingletonRootNC().viewControllers=[<Sales_App.MainViewController: 0x7c90d000>, <Sales_App.CustomerDetailViewController: 0x7d14c200>] // self.selectPictureAlertController.dismissViewControllerAnimated(false, completion: nil) // self.dismissViewControllerAnimated(false, completion: { // dispatchMain_sync(0.1, thingsTodo: { // self.selectPictureAlertController.dismissViewControllerAnimated(false, completion: nil) // // dispatchMain_sync(0.1, thingsTodo: { // self.dismissViewControllerAnimated(false, completion: nil) // }) // }) // } ) // dispatchMain_sync(0.05, thingsTodo: { // self.selectPictureAlertController.dismissViewControllerAnimated(false, completion: nil) // // dispatchMain_sync(0.2, thingsTodo: { // self.dismissViewControllerAnimated(false, completion: nil) // }) // }) // dispatchMain_sync(0.05, thingsTodo: { // self.selectPictureAlertController.dismissViewControllerAnimated(false, completion: nil) // // dispatchMain_sync(0.2, thingsTodo: { // self.dismissViewControllerAnimated(false, completion: nil) // }) // }) // dispatchMain_async({ gLog.verbose("self=\(self), self.parentViewController=\(self.parentViewController), self.presentationController=\(self.presentationController), self.presentedViewController=\(self.presentedViewController), self.presentingViewController=\(self.presentingViewController)") //self=<Sales_App.ImagePickerViewController: 0x7be7ad40>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7bf56830>), self.presentedViewController=Optional(<UIImagePickerController: 0x7c1c3a00>), self.presentingViewController=Optional(<UINavigationController: 0x7d902c00>) //self=<Sales_App.ImagePickerViewController: 0x7a9d5f70>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7a9e1540>), self.presentedViewController=Optional(<UIImagePickerController: 0x7a268c00>), self.presentingViewController=Optional(<UINavigationController: 0x7926ac00>) self.dismissViewControllerAnimated(false, completion: { // dispatchMain_async({ gLog.verbose("self=\(self), self.parentViewController=\(self.parentViewController), self.presentationController=\(self.presentationController), self.presentedViewController=\(self.presentedViewController), self.presentingViewController=\(self.presentingViewController)") //self=<Sales_App.ImagePickerViewController: 0x7be7ad40>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7bf56830>), self.presentedViewController=Optional(<UIAlertController: 0x7d93e800>), self.presentingViewController=Optional(<UINavigationController: 0x7d902c00>) //self=<Sales_App.ImagePickerViewController: 0x7a9d5f70>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7a9e1540>), self.presentedViewController=nil, self.presentingViewController=Optional(<UINavigationController: 0x7926ac00>) self.dismissViewControllerAnimated(false, completion: { // dispatchMain_async({ gLog.verbose("self=\(self), self.parentViewController=\(self.parentViewController), self.presentationController=\(self.presentationController), self.presentedViewController=\(self.presentedViewController), self.presentingViewController=\(self.presentingViewController)") //self=<Sales_App.ImagePickerViewController: 0x7be7ad40>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7bf56830>), self.presentedViewController=nil, self.presentingViewController=Optional(<UINavigationController: 0x7d902c00>) //self=<Sales_App.ImagePickerViewController: 0x7a9d5f70>, self.parentViewController=nil, self.presentationController=nil, self.presentedViewController=Optional(<UIAlertController: 0x79b46a00>), self.presentingViewController=nil self.dismissViewControllerAnimated(false, completion: nil) // }) }) // }) }) // }) // self.dismissViewControllerAnimated(true, completion: { // //self.dismissViewControllerAnimated(true, completion: nil) //// SingletonRootNC().popViewControllerAnimated(true) //// parentVC?.dismissViewControllerAnimated(true, completion: nil) // // gLog.verbose("SingletonRootNC().viewControllers=\(SingletonRootNC().viewControllers)") // //SingletonRootNC().viewControllers=[<Sales_App.MainViewController: 0x7b2dbe00>, <Sales_App.CustomerDetailViewController: 0x7aa7fa00>] // // dispatchMain_sync(0.1, thingsTodo: { // self.selectPictureAlertController.dismissViewControllerAnimated(true, completion: nil) // // gLog.verbose("SingletonRootNC().viewControllers=\(SingletonRootNC().viewControllers)") // //// SingletonRootNC().popViewControllerAnimated(true) //// gLog.verbose("SingletonRootNC().viewControllers=\(SingletonRootNC().viewControllers)") // }) // }) // self.selectPictureAlertController.dismissViewControllerAnimated(false, completion: { //// dispatchMain_sync(0.1, thingsTodo: { // self.dismissViewControllerAnimated(false, completion: nil) //// }) // }) |
最终用代码：
gLog.verbose("self=\(self), self.parentViewController=\(self.parentViewController), self.presentationController=\(self.presentationController), self.presentedViewController=\(self.presentedViewController), self.presentingViewController=\(self.presentingViewController), self.selectPictureAlertController=\(self.selectPictureAlertController)") //self=<Sales_App.ImagePickerViewController: 0x7c6f1640>, parentVC=nil, self.selectPictureAlertController=<UIAlertController: 0x7d429e00> //self=<Sales_App.ImagePickerViewController: 0x7c730010>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7bfc3ad0>), self.presentedViewController=Optional(<UIImagePickerController: 0x7d9a7a00>), self.presentingViewController=Optional(<UINavigationController: 0x7d152400>), self.selectPictureAlertController=<UIAlertController: 0x7e17e200> gLog.verbose("SingletonRootNC().viewControllers=\(SingletonRootNC().viewControllers)") //SingletonRootNC().viewControllers=[<Sales_App.MainViewController: 0x7b2dbe00>, <Sales_App.CustomerDetailViewController: 0x7aa7fa00>] //SingletonRootNC().viewControllers=[<Sales_App.MainViewController: 0x7c90d000>, <Sales_App.CustomerDetailViewController: 0x7d14c200>] gLog.verbose("self=\(self), self.parentViewController=\(self.parentViewController), self.presentationController=\(self.presentationController), self.presentedViewController=\(self.presentedViewController), self.presentingViewController=\(self.presentingViewController)") //self=<Sales_App.ImagePickerViewController: 0x7be7ad40>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7bf56830>), self.presentedViewController=Optional(<UIImagePickerController: 0x7c1c3a00>), self.presentingViewController=Optional(<UINavigationController: 0x7d902c00>) //self=<Sales_App.ImagePickerViewController: 0x7a9d5f70>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7a9e1540>), self.presentedViewController=Optional(<UIImagePickerController: 0x7a268c00>), self.presentingViewController=Optional(<UINavigationController: 0x7926ac00>) self.dismissViewControllerAnimated(false, completion: { gLog.verbose("self=\(self), self.parentViewController=\(self.parentViewController), self.presentationController=\(self.presentationController), self.presentedViewController=\(self.presentedViewController), self.presentingViewController=\(self.presentingViewController)") //self=<Sales_App.ImagePickerViewController: 0x7be7ad40>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7bf56830>), self.presentedViewController=Optional(<UIAlertController: 0x7d93e800>), self.presentingViewController=Optional(<UINavigationController: 0x7d902c00>) //self=<Sales_App.ImagePickerViewController: 0x7a9d5f70>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7a9e1540>), self.presentedViewController=nil, self.presentingViewController=Optional(<UINavigationController: 0x7926ac00>) self.dismissViewControllerAnimated(false, completion: { gLog.verbose("self=\(self), self.parentViewController=\(self.parentViewController), self.presentationController=\(self.presentationController), self.presentedViewController=\(self.presentedViewController), self.presentingViewController=\(self.presentingViewController)") //self=<Sales_App.ImagePickerViewController: 0x7be7ad40>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7bf56830>), self.presentedViewController=nil, self.presentingViewController=Optional(<UINavigationController: 0x7d902c00>) //self=<Sales_App.ImagePickerViewController: 0x7a9d5f70>, self.parentViewController=nil, self.presentationController=nil, self.presentedViewController=Optional(<UIAlertController: 0x79b46a00>), self.presentingViewController=nil self.dismissViewControllerAnimated(false, completion: nil) }) }) |
实现了，可以正常显示：
点击➕后：
点击 打开本地相册：
点选图片后，正常消失掉：
－》然后通过三次的输出：
self=<Sales_App.ImagePickerViewController: 0x7be7ad40>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7bf56830>), self.presentedViewController=Optional(<UIImagePickerController: 0x7c1c3a00>), self.presentingViewController=Optional(<UINavigationController: 0x7d902c00>) self=<Sales_App.ImagePickerViewController: 0x7be7ad40>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7bf56830>), self.presentedViewController=Optional(<UIAlertController: 0x7d93e800>), self.presentingViewController=Optional(<UINavigationController: >) self=<Sales_App.ImagePickerViewController: 0x7be7ad40>, self.parentViewController=nil, self.presentationController=Optional(<UIPresentationController: 0x7bf56830>), self.presentedViewController=nil, self.presentingViewController=Optional(<UINavigationController: 0x7d902c00>) |
可以看出：
在点击了 打开相册，去选择相册之后，而返回之前的页面时：
对于之前通过调用：
self.presentViewController
即：
imagePickVC.modalPresentationStyle = .Custom self.presentViewController(imagePickVC, animated: true, completion: nil) －》 self.presentViewController(selectPictureAlertController, animated: false, completion: nil) －》 self.presentViewController(imagePicker, animated: true, completion: nil) |
的话：
（1）正在显示的页面是self.presentedViewController
对于始终都是用当前的vc的
self.presentedViewController
来表示的
（2）用于显示字页面的上一级页面是self.presentationController
上述三层调用，都是：
self.presentationController=Optional(<UIPresentationController: 0x7bf56830>)
（3）当前的父页面parent是空的：
self.parentViewController=nil
（4）对应着源码中的解释：
/* If this view controller is a child of a containing view controller (e.g. a navigation controller or tab bar controller,) this is the containing view controller. Note that as of 5.0 this no longer will return the presenting view controller. */ weak public var parentViewController: UIViewController? { get } // The view controller that was presented by this view controller or its nearest ancestor. @available(iOS 5.0, *) public var presentedViewController: UIViewController? { get } // The view controller that presented this view controller (or its farthest ancestor.) @available(iOS 5.0, *) public var presentingViewController: UIViewController? { get } |
先后有三个（层）页面：
1.选择图片的页面是：<UIImagePickerController: 0x7c1c3a00>
2.alert view的<UIAlertController: 0x7d93e800>
3.当前vc中显示出了的那个：UIAlertController: 0x79b46a00>
通过：
self.dismissViewControllerAnimated() |
去让其消失掉
而最终会到，最开始的，调用此ImagePickerViewController的页面中。
［后记］
改为了独立的vc，结果还是有问题：
［基本解决］在单独的vc中去presentViewController显示UIAlertController后无法让其消失
转载请注明：在路上 » ［已解决］swift中给已有的ViewController中添加UIAlertAction并直接显示和正常消失返回被调用者视图