1
我想在我的iOS 9应用中执行偷看和流行。有问题的观点有一个UITableView,所以我必须在我的代码:在iOS 9应用崩溃中偷看
- (UIViewController *)previewingContext:(id<UIViewControllerPreviewing>)previewingContext viewControllerForLocation:(CGPoint)location {
// check if we're not already displaying a preview controller
if ([self.presentedViewController isKindOfClass:[WebViewController class]]) {
return nil;
}
// shallow press: return the preview controller here (peek)
self.webViewController = [[[WebViewController alloc] initWithNibName:@"WebViewController" bundle:[NSBundle mainBundle]] autorelease];
return self.webViewController;
}
- (void)previewingContext:(id<UIViewControllerPreviewing>)previewingContext commitViewController:(UIViewController *)viewControllerToCommit {
// deep press: bring up the commit view controller (pop)
self.webViewController = [[[WebViewController alloc] initWithNibName:@"WebViewController" bundle:[NSBundle mainBundle]] autorelease];
[self showViewController:self.webViewController sender:self];
}
WebViewController
是我已经设置了选择的tableview的一行时,显示内容的ViewController
。我得到的错误是:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSCFConstantString stringByAppendingString:]: nil argument'
*** First throw call stack:
(0x182160f5c 0x19764bf80 0x182160ea4 0x182fb8868 0x1001307a4 0x1876cf9ac 0x1876cf720 0x187a025f8 0x187960844 0x18796cde4 0x1876a91e4 0x182117c30 0x1821159d4 0x182115e04 0x182044dc0 0x18d4e0088 0x18771ef60 0x10014ca68 0x197e6a8b8)
libc++abi.dylib: terminating with uncaught exception of type NSException
听起来像是一个很好的时间谷歌“Xcode异常断点” –
@GradyPlayer随着这一点,应用程序崩溃之前,甚至发生任何事情。除了断点外,它运行良好,直到偷看。 – user717452
听起来像你激活“所有异常断点”。例如,如果使用NSURLSession,则会立即抛出,因为它们使用控制流的异常。选择“仅使用Objc断点”。 – HAS