Ios 从NavigationController切换到查看控制器抛出NSException终止
我正在尝试向视图控制器中的导航项添加一个按钮，该按钮将切换到PageViewController。我想这很简单，但当我点击按钮时，我收到以下错误：Ios 从NavigationController切换到查看控制器抛出NSException终止,ios,segue,uipageviewcontroller,Ios,Segue,Uipageviewcontroller,我正在尝试向视图控制器中的导航项添加一个按钮，该按钮将切换到PageViewController。我想这很简单，但当我点击按钮时，我收到以下错误： libc++abi.dylib: terminating with uncaught exception of type NSException XCode的编辑器显示： Thread 1: signal SIGABRT 以下是我的设置： 带导航栏按钮的ViewController: class AudioBookViewController:
libc++abi.dylib: terminating with uncaught exception of type NSException
Thread 1: signal SIGABRT
class AudioBookViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UINavigationBarDelegate{
@IBAction func helpButtonPressed(_ sender: Any) {
performSegue(withIdentifier: Constants.Segues.SegueFromAudiobooksToHelp, sender: self)
//The exception is thrown when trying to perform the segue above
Thread.callStackSymbols.forEach{print(" ",$0)}
}
...
class PageViewController: UIPageViewController,UIPageViewControllerDelegate, UIPageViewControllerDataSource {
let screens = ["Screen1","Screen2"]
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self as UIPageViewControllerDelegate
self.dataSource = self as UIPageViewControllerDataSource
}
override func viewDidAppear(_ animated: Bool) {
let vc = self.storyboard?.instantiateViewController(withIdentifier: screens[0])
setViewControllers([vc!], // Has to be a single item array, unless you're doing double sided stuff I believe
direction: .forward,
animated: true,
completion: nil)
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
if let identifier = viewController.restorationIdentifier, let index = screens.index(of: identifier){
if index > 0{
return self.storyboard?.instantiateViewController(withIdentifier: screens[index - 1])
}
}
return nil
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
if let identifier = viewController.restorationIdentifier, let index = screens.index(of: identifier){
if index < screens.count - 1 {
return self.storyboard?.instantiateViewController(withIdentifier: screens[index + 1])
}
}
return nil
}
func presentationCount(for pageViewController: UIPageViewController) -> Int {
return screens.count
}
func presentationIndex(for pageViewController: UIPageViewController) -> Int {
if let identifier = viewControllers?.first?.restorationIdentifier, let index = screens.index(of: identifier){
return index
}
return 0
}
struct Constants {
struct NotificationKeys{
...
}
struct Segues {
....
static let SegueFromAudiobooksToHelp = "SegueFromAudiobooksToHelp"
static let SegueFromTopicsToHelp = "SegueFromTopicsToHelp"
....
}
struct RegistrationOutcome{
...
}
}
class AudioBookViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UINavigationBarDelegate{
@IBAction func helpButtonPressed(_ sender: Any) {
performSegue(withIdentifier: Constants.Segues.SegueFromAudiobooksToHelp, sender: self)
//The exception is thrown when trying to perform the segue above
Thread.callStackSymbols.forEach{print(" ",$0)}
}
...
class PageViewController: UIPageViewController,UIPageViewControllerDelegate, UIPageViewControllerDataSource {
let screens = ["Screen1","Screen2"]
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self as UIPageViewControllerDelegate
self.dataSource = self as UIPageViewControllerDataSource
}
override func viewDidAppear(_ animated: Bool) {
let vc = self.storyboard?.instantiateViewController(withIdentifier: screens[0])
setViewControllers([vc!], // Has to be a single item array, unless you're doing double sided stuff I believe
direction: .forward,
animated: true,
completion: nil)
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
if let identifier = viewController.restorationIdentifier, let index = screens.index(of: identifier){
if index > 0{
return self.storyboard?.instantiateViewController(withIdentifier: screens[index - 1])
}
}
return nil
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
if let identifier = viewController.restorationIdentifier, let index = screens.index(of: identifier){
if index < screens.count - 1 {
return self.storyboard?.instantiateViewController(withIdentifier: screens[index + 1])
}
}
return nil
}
func presentationCount(for pageViewController: UIPageViewController) -> Int {
return screens.count
}
func presentationIndex(for pageViewController: UIPageViewController) -> Int {
if let identifier = viewControllers?.first?.restorationIdentifier, let index = screens.index(of: identifier){
return index
}
return 0
}
struct Constants {
struct NotificationKeys{
...
}
struct Segues {
....
static let SegueFromAudiobooksToHelp = "SegueFromAudiobooksToHelp"
static let SegueFromTopicsToHelp = "SegueFromTopicsToHelp"
....
}
struct RegistrationOutcome{
...
}
}
class AudioBookViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UINavigationBarDelegate{
@IBAction func helpButtonPressed(_ sender: Any) {
performSegue(withIdentifier: Constants.Segues.SegueFromAudiobooksToHelp, sender: self)
//The exception is thrown when trying to perform the segue above
Thread.callStackSymbols.forEach{print(" ",$0)}
}
...
class PageViewController: UIPageViewController,UIPageViewControllerDelegate, UIPageViewControllerDataSource {
let screens = ["Screen1","Screen2"]
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self as UIPageViewControllerDelegate
self.dataSource = self as UIPageViewControllerDataSource
}
override func viewDidAppear(_ animated: Bool) {
let vc = self.storyboard?.instantiateViewController(withIdentifier: screens[0])
setViewControllers([vc!], // Has to be a single item array, unless you're doing double sided stuff I believe
direction: .forward,
animated: true,
completion: nil)
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
if let identifier = viewController.restorationIdentifier, let index = screens.index(of: identifier){
if index > 0{
return self.storyboard?.instantiateViewController(withIdentifier: screens[index - 1])
}
}
return nil
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
if let identifier = viewController.restorationIdentifier, let index = screens.index(of: identifier){
if index < screens.count - 1 {
return self.storyboard?.instantiateViewController(withIdentifier: screens[index + 1])
}
}
return nil
}
func presentationCount(for pageViewController: UIPageViewController) -> Int {
return screens.count
}
func presentationIndex(for pageViewController: UIPageViewController) -> Int {
if let identifier = viewControllers?.first?.restorationIdentifier, let index = screens.index(of: identifier){
return index
}
return 0
}
struct Constants {
struct NotificationKeys{
...
}
struct Segues {
....
static let SegueFromAudiobooksToHelp = "SegueFromAudiobooksToHelp"
static let SegueFromTopicsToHelp = "SegueFromTopicsToHelp"
....
}
struct RegistrationOutcome{
...
}
}
0 KA Audio Book 0x00000001000102a8 _TFC13KA_Audio_Book23AudioBookViewController17helpButtonPressedfP_T_ + 260
1 KA Audio Book 0x000000010001070c _TToFC13KA_Audio_Book23AudioBookViewController17helpButtonPressedfP_T_ + 72
2 UIKit 0x000000019792bd30 <redacted> + 96
3 UIKit 0x0000000197a9f880 <redacted> + 168
4 UIKit 0x000000019792bd30 <redacted> + 96
5 UIKit 0x000000019792bcb0 <redacted> + 80
6 UIKit 0x0000000197916128 <redacted> + 452
7 UIKit 0x0000000197916290 <redacted> + 812
8 UIKit 0x000000019792b59c <redacted> + 584
9 UIKit 0x000000019792b0c4 <redacted> + 2484
10 UIKit 0x0000000197926328 <redacted> + 2988
11 UIKit 0x00000001978f6da0 <redacted> + 340
12 UIKit 0x00000001980e075c <redacted> + 2736
13 UIKit 0x00000001980da130 <redacted> + 784
14 CoreFoundation 0x00000001919eeb5c <redacted> + 24
15 CoreFoundation 0x00000001919ee4a4 <redacted> + 524
16 CoreFoundation 0x00000001919ec0a4 <redacted> + 804
17 CoreFoundation 0x000000019191a2b8 CFRunLoopRunSpecific + 444
18 GraphicsServices 0x00000001933ce198 GSEventRunModal + 180
19 UIKit 0x00000001979617fc <redacted> + 684
20 UIKit 0x000000019795c534 UIApplicationMain + 208
21 KA Audio Book 0x000000010004f65c main + 76
22 libdyld.dylib 0x00000001908fd5b8 <redacted> + 4
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
0 KA有声读物0x00000001000102a8\u TFC13KA有声读物23有声读物视图控制器17帮助按钮按下DFP\u T+260
1 KA有声读物0x000000010001070c\u TToFC13KA有声读物23AudioBookViewController17帮助按钮按下P\u T\u72
2 UIKit 0x000000019792bd30+96
3 UIKit 0x0000000197a9f880+168
4 UIKit 0x000000019792bd30+96
5 UIKit 0x000000019792bcb0+80
6 UIKit 0x0000000197916128+452
7 UIKit 0x0000000197916290+812
8 UIKit 0x000000019792b59c+584
9 UIKit 0x000000019792b0c4+2484
10 UIKit 0x0000000197926328+2988
11 UIKit 0x00000001978f6da0+340
12 UIKit 0x00000001980e075c+2736
13 UIKit 0x00000001980da130+784
14核心基金会0x00000001919eeb5c+24
15 CoreFoundation 0x00000001919ee4a4+524
16 CoreFoundation 0x00000001919ec0a4+804
17 CoreFoundation 0x000000019191a2b8 CFRunLoopRunSpecific+444
18图形服务0x00000001933ce198 GSEventRunModal+180
19 UIKit 0x00000001979617fc+684
20 UIKit 0x000000019795c534 UIApplicationMain+208
21千卡有声读物0x000000010004f65c主+76
22 libdyld.dylib 0x00000001908fd5b8+4
libc++abi.dylib:以NSException类型的未捕获异常终止
（lldb）
我用普通的ViewController替换了PageViewController，segue工作正常。这确认问题出在我正在进入的PageViewController上。我认为PageViewController的第一屏VC没有被正确创建或引用。这是我第一次使用PageViewController，所以我肯定遗漏了什么…我找到了解决方案。。。我无法完全以编程方式设置我的pageview控制器。相反，我必须为每个页面创建一个ViewController情节提要元素，同时命名与我的PageViewController中的标识符相对应的每个ViewController名称
确保已选中“使用情节提要ID”。很难根据提供的内容进行诊断。您可以包括控制台中出现的所有内容吗？通常还有更多的信息（乍一看可能有些神秘/不重要，但通常有一些信息可以从中剔除）。如果没有这一点，堆栈跟踪也会很有用。您还可以添加一个异常断点，它有时可以帮助确定导致问题的确切代码行。