我试图在按钮从ViewController1切换到ViewController2时更改根视图控制器,反之亦然。问题是我将第二个视图控制器设置为根视图控制器后出现黑屏。我随函附上我的代码。
我的AppDelegate.swift
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
let storyBoard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
let vc1 = storyBoard.instantiateViewControllerWithIdentifier("VC1") as! VC1
let nc = UINavigationController(rootViewController: vc1)
self.window?.rootViewController = nc
self.window?.makeKeyAndVisible()
return true
}
First View Controller(VC1.swift)
class VC1: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
deinit {
print("Deinit of VC1")
}
@IBAction func btnTapped(sender: AnyObject) {
let window = UIApplication.sharedApplication().windows[0]
let rootNavigationControl = window.rootViewController as! UINavigationController
let storyBoard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
let vc2 = storyBoard.instantiateViewControllerWithIdentifier("VC2") as! VC2
let nc = UINavigationController(rootViewController: vc2)
rootNavigationControl.presentViewController(nc, animated: true) { () -> Void in
// ------- Becomes black screen here ----------
rootNavigationControl.viewControllers = [vc2]
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
第二视图控制器(VC2.swift)
class VC2: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
deinit {
print("Deinit of VC2")
}
@IBAction func btnTapped(sender: AnyObject) {
let window = UIApplication.sharedApplication().windows[0]
let rootNavigationControl = window.rootViewController as! UINavigationController
let storyBoard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
let vc1 = storyBoard.instantiateViewControllerWithIdentifier("VC1") as! VC1
let nc = UINavigationController(rootViewController: vc1)
rootNavigationControl.presentViewController(nc, animated: true) { () -> Void in
rootNavigationControl.viewControllers = [vc1]
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
请有人帮我解决问题所在。 提前感谢所有的帮助。
答案 0 :(得分:0)
我会做这样的事情:
AppDelegate.swift
GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.registerTypeAdapter(MyEnum.class, new UppercaseEnumAdapter());
Gson gson = gsonBuilder.create();
VC1.swift
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
{
let storyBoard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
let vc1 = storyBoard.instantiateViewControllerWithIdentifier("VC1")
let nc = UINavigationController(rootViewController: vc1)
self.window?.rootViewController = nc
return true
}
VC2.swift
class VC1: UIViewController
{
@IBAction func btnTapped(sender: AnyObject)
{
if let vc2 = self.storyboard?.instantiateViewControllerWithIdentifier("VC2")
{
self.navigationController?.pushViewController(vc2, animated: true)
}
}
}