我尝试使用 NSPageController
创建向导。但我不明白我需要在委托(delegate)方法中返回什么。我将 navigateForward
附加到我的按钮,当我点击它时,我得到:
[__NSArrayM objectAtIndex:]: index 1 beyond bounds [0 .. 0]
class BoardAligmentPageController: NSPageController, NSPageControllerDelegate {
var orderedViewControllers: [NSViewController] = {
return [NSStoryboard(name: "Main", bundle:nil).instantiateController(withIdentifier: "BoardAligmentStep1ViewController") as! NSViewController,
NSStoryboard(name: "Main", bundle:nil).instantiateController(withIdentifier: "BoardAligmentStep2ViewController") as! NSViewController,
NSStoryboard(name: "Main", bundle:nil).instantiateController(withIdentifier: "BoardAligmentStep2ViewController") as! NSViewController,
]
}()
override func viewDidLoad() {
super.viewDidLoad()
delegate = self
self.arrangedObjects = orderedViewControllers
}
func pageController(_ pageController: NSPageController, identifierFor object: Any) -> String {
return "\(self.selectedIndex)"
}
func pageController(_ pageController: NSPageController, viewControllerForIdentifier identifier: String) -> NSViewController {
return orderedViewControllers[Int(identifier)!]
}
}
最佳答案
看起来您的 orderedViewControllers
属性实际上并未设置(因为您遇到了“越界”错误)。
不要做那个属性,试着按需做:
func pageController(_ pageController: NSPageController, identifierFor object: Any) -> String {
print("\(self.selectedIndex)")
switch(self.selectedIndex)
{
case 0 :
return "BoardAligmentStep1ViewController"
case 1 :
return "BoardAligmentStep2ViewController"
case 2 :
return "BoardAligmentStep3ViewController"
default :
return "SomeDefaultViewController"
}
}
func pageController(_ pageController: NSPageController, viewControllerForIdentifier identifier: String) -> NSViewController {
return self.storyboard?.instantiateController(withIdentifier: identifier) as! NSViewController
}
关于swift - NSPageController 快速示例,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40802652/