问题描述
我有基于索引的自定义UIPageViewController,在其中尝试实现显示下一页或上一页的move方法。 SO上的大多数答案都告诉我们,以编程方式设置当前页面的唯一方法是调用setViewControllers(direction:animated:completion:)
方法,但是当我从按钮调用此方法并单击很多时,很快会抛出异常:
Exception NSException * "Unexpected view controller: <MyPageViewController: 0x106175ef0>" 0x00000002800fa460
name __NSCFConstantString * "NSInternalInconsistencyException" 0x0000000200e3dac0
reason __NSCFString * "Unexpected view controller: <MyPageViewController: 0x106175ef0>" 0x0000000282492680
这是我的move(direction:)
方法:
func move(_ direction: UIPageViewController.NavigationDirection) {
var destination: MyPageViewController!
switch direction {
case .forward: destination = self.nextPage?.viewController
case .reverse: destination = self.prevPage?.viewController
@unkNown default: fatalError("\(type(of: self)): UnkNow direction = \(direction)")
}
self.setViewControllers([destination],direction: direction,animated: true,completion: nil)
}
在我的自定义UIPagerViewController中,我拥有3个页面,并在UIPageViewControllerDataSource
中在它们之间循环移动。
为什么会发生此错误?现在,我禁用下一个按钮,直到页面更改结束(通过completion
arg),但由于它限制了页面更改的速度,因此我认为这不是一个好的解决方案。
以下是一些错误日志:
2020-09-24 11:24:06.619878+0800 MyApp[976:249262] *** Assertion failure in -[MyUIPageViewController queuingScrollView:willManuallyScroll:toRevealView:concealView:animated:],/Library/Caches/com.apple.xbs/Sources/UIKitCore/UIKit-3920.31.102/UIPageViewController.m:1959
2020-09-24 11:24:06.620689+0800 MyApp[976:249262]
2020-09-24 11:24:06.620813+0800 MyApp[976:249262] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException',reason: 'Unexpected view controller: <MyApp.MyPageViewController: 0x106175ef0>'
*** First throw call stack:
(0x1bf749654 0x1bf46bbcc 0x1bf64c6ec 0x1bfa9216c 0x1c314c940 0x1c3156d94 0x1c31581fc 0x1c3157d50 0x1c3153f78 0x1c3cb17fc 0x1c624e494 0x1c62545ec 0x1c625f128 0x1c61a7b44 0x1c61d14e4 0x1c610e120 0x1c0698650 0x1bf69eb34 0x1bf6c8174 0x1bf6c7880 0x1bf6c2634 0x1bf6c1ba8 0x1c9831344 0x1c37fd3e4 0x1049dcea0 0x1bf5498f0)
libc++abi.dylib: terminating with uncaught exception of type NSException
解决方法
暂无找到可以解决该程序问题的有效方法,小编努力寻找整理中!
如果你已经找到好的解决方法,欢迎将解决方案带上本链接一起发送给小编。
小编邮箱:dio#foxmail.com (将#修改为@)