我正在使用故事板在swift中构建应用程序。它由UITabBarController
,UINavigationController and three
UIViewController`。
TabBarController - > NavigationController - > ViewController1 - > VC2 - > VC3
我想构建应用程序,以便前两个视图控制器只能在纵向中,而第三个只能在 LandscapeRight 中。
我为UITabBarController创建子类:
class OrientationTab: UITabBarController {
override func shouldAutorotate() -> Bool{
if self.selectedViewController != nil{
if self.selectedViewController.respondsToSelector("shouldAutorotate") {
println("TAB - shouldAutorotate - inside if")
return self.selectedViewController.shouldAutorotate()
}
}
println("TAB - shouldAutorotate - outside if")
return true
}
override func supportedInterfaceOrientations() -> Int{
if self.selectedViewController != nil{
if self.selectedViewController.respondsToSelector("supportedInterfaceOrientations"){
println("TAB - supportedInterfaceOrientations - inside if")
return self.selectedViewController.supportedInterfaceOrientations()
}
}
println("TAB - supportedInterfaceOrientations - outside if")
return Int(UIInterfaceOrientationMask.All.rawValue)
}
和 UINavigationController :
class OrientationNav: UINavigationController {
override func shouldAutorotate() -> Bool{
if self.topViewController.respondsToSelector("shouldAutorotate") {
println("NAV - shouldAutorotate - if")
return self.topViewController.shouldAutorotate()
}else{
println("NAV - shouldAutorotate - else")
return true
}
}
override func supportedInterfaceOrientations() -> Int{
if self.topViewController.respondsToSelector("supportedInterfaceOrientations"){
println("NAV - supportedInterfaceOrientations - if")
return self.topViewController.supportedInterfaceOrientations()
}else{
println("NAV - supportedInterfaceOrientations - else")
return Int(UIInterfaceOrientationMask.All.rawValue)
}
}
在自定义ViewController 中我添加了以下方法:
override func shouldAutorotate() -> Bool{
// This method is the same for all the three custom ViewController
return true
}
override func supportedInterfaceOrientations() -> Int{
// Portrait for the first 2 ViewController
return Int(UIInterfaceOrientationMask.Portrait.rawValue)
// LandscapeRight for the third
return Int(UIInterfaceOrientationMask.LandscapeRight.rawValue)
}
当我启动应用程序时,前两个ViewController在Portrait中被阻止,第三个而不是在LandscapeRight方向处于纵向模式。仅当我将设备旋转到LandscapeRight时,界面才会旋转到正确的位置。我该如何解决这个问题?
此外,当我尝试使用BackButton返回navigationBar的第二个ViewController时,页面仍然被阻止,我收到此错误:Unbalanced calls to begin/end appearance transitions for <_TtC11AppNamem6Detail: 0x145ab3a0>.
答案 0 :(得分:1)
在子viewController中,您可以指定要支持的方向:
override func supportedInterfaceOrientations() -> Int
{
// designate we only like to be in landscape mode
return UIInterfaceOrientationMask.Landscape.rawValue.hashValue
}
在navigationController(root)中,指定它是否可以根据子视图控制器进行旋转:
override func shouldAutorotate() -> Bool
{
return self.topViewController.shouldAutorotate()
}
然后在子视图控制器中设置是否应该旋转:
override func shouldAutorotate() -> Bool
{
// tells the root view controller we don't want to be reoriented
return false
}
这将停止旋转所需的视图。
然后,如果你想强制它进入特定的方向,那么你设置......
override func viewWillAppear(animated: Bool)
{
// when the view controller appears rotate it to landscape mode
UIApplication.sharedApplication().setStatusBarOrientation(UIInterfaceOrientation.LandscapeRight, animated: true)
}
答案 1 :(得分:1)
Swift 3需要这些是var而不是func类型。
override var shouldAutorotate: Bool {
return false
}
override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return .all
}
答案 2 :(得分:0)
根据对同一问题的大量研究。某些资源声明所有视图控制器必须是相同的模式。使用UINavigationController时,您不能与其他人有所不同。