app界面卡死在：
出错：
2016-03-17 17:30:12.057 JianDao[834:119956] *** Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘Pushing the same view controller instance more than once is not supported (<JianDao.MessageTableViewController: 0x156e44730>)’ *** First throw call stack: (0x183031900 0x18269ff80 0x187dba8cc 0x187db9f90 0x187e27044 0x187e54484 0x187e53294 0x187fbe870 0x187d5f394 0x187d5ee90 0x187d5ed18 0x185735c00 0x1017a5bb0 0x1017ab658 0x182fe8bb0 0x182fe6a18 0x182f15680 0x184424088 0x187d8cd90 0x100083444 0x182ab68b8) libc++abi.dylib: terminating with uncaught exception of type NSException |
如图：
暂时不去改了。。。
以后再说。
之后对于代码：
func sendMessageToPerson(){ print("sendMessageToPerson") let selectedContactMsgTVC:MessageTableViewController = getMsgTVCFromItem(self.curPersonItem) self.showViewController(selectedContactMsgTVC, sender: self) } |
又出现类似的错误：
2016-03-19 15:44:27.247 JianDao[32124:1512303] *** Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘Pushing the same view controller instance more than once is not supported (<JianDao.MessageTableViewController: 0x7ce466c0>)’ *** First throw call stack: ( 0 CoreFoundation 0x02683a14 __exceptionPreprocess + 180 1 libobjc.A.dylib 0x03d4ae02 objc_exception_throw + 50 2 UIKit 0x00ad08df __71-[UINavigationController pushViewController:transition:forceImmediate:]_block_invoke + 0 3 UIKit 0x0f40583c -[UINavigationControllerAccessibility pushViewController:transition:forceImmediate:] + 73 4 UIKit 0x00acfce5 __54-[UINavigationController pushViewController:animated:]_block_invoke + 491 5 UIKit 0x00acfab5 -[UINavigationController pushViewController:animated:] + 786 6 UIKit 0x00acf2d8 -[UINavigationController showViewController:sender:] + 170 7 libobjc.A.dylib 0x03d5f0b5 -[NSObject performSelector:withObject:withObject:] + 84 8 UIKit 0x00a9d857 -[UIViewController _showViewController:withAction:sender:] + 137 9 UIKit 0x00a9d976 -[UIViewController showViewController:sender:] + 67 10 JianDao 0x002496b1 _TFC7JianDao24PersonInfoViewController19sendMessageToPersonfS0_FT_T_ + 305 11 JianDao 0x00249712 _TToFC7JianDao24PersonInfoViewController19sendMessageToPersonfS0_FT_T_ + 34 12 libobjc.A.dylib 0x03d5f0b5 -[NSObject performSelector:withObject:withObject:] + 84 13 UIKit 0x008b5b79 -[UIApplication sendAction:to:from:forEvent:] + 118 14 UIKit 0x008b5af8 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 64 15 UIKit 0x00a558f8 -[UIControl sendAction:to:forEvent:] + 79 16 UIKit 0x00a55c78 -[UIControl _sendActionsForEvents:withEvent:] + 408 17 UIKit 0x00a54c7e -[UIControl touchesEnded:withEvent:] + 714 18 UIKit 0x00932182 -[UIWindow _sendTouchesForEvent:] + 1095 19 UIKit 0x00933220 -[UIWindow sendEvent:] + 1159 20 UIKit 0x008d7f93 -[UIApplication sendEvent:] + 266 21 UIKit 0x0f3bf657 -[UIApplicationAccessibility sendEvent:] + 72 22 UIKit 0x008ad668 _UIApplicationHandleEventQueue + 7802 23 CoreFoundation 0x0259d6ff __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 24 CoreFoundation 0x0259338b __CFRunLoopDoSources0 + 523 25 CoreFoundation 0x025927a8 __CFRunLoopRun + 1032 26 CoreFoundation 0x025920e6 CFRunLoopRunSpecific + 470 27 CoreFoundation 0x02591efb CFRunLoopRunInMode + 123 28 GraphicsServices 0x05b36664 GSEventRunModal + 192 29 GraphicsServices 0x05b364a1 GSEventRun + 104 30 UIKit 0x008b3bfa UIApplicationMain + 160 31 JianDao 0x00085ccc main + 140 32 libdyld.dylib 0x04a88a21 start + 1 ) libc++abi.dylib: terminating with uncaught exception of type NSException |
如图：
很明显：
此处是已经有了此视图（聊天对话的视图），但是又再次加入视图堆栈，所以报错，不支持。
搜：
参考：
ios – Pushing View Controller more than once is not supported? – Stack Overflow
Pushing the same view controller instance more … | Apple Support Communities
【总结】
最后改为：
let selectedContactMsgTVC:MessageTableViewController = getMsgTVCFromItem(self.curPersonItem) doShowViewController(self, vcToShow: selectedContactMsgTVC) func doShowViewController(curVc:UIViewController, vcToShow:UIViewController) { print("doShowViewController curVc=\(curVc), vcToShow=\(vcToShow)") //doShowViewController curVc=<JianDao.PersonInfoViewController: 0x7aeebe10>, vcToShow=<JianDao.MessageTableViewController: 0x79f80b80> if existedViewController(vcToShow) { //pop to that view controller // print("curVc.navigationController?.viewControllers=\(curVc.navigationController?.viewControllers)") curVc.navigationController?.popToViewController(vcToShow, animated: true) // print("curVc.navigationController?.viewControllers=\(curVc.navigationController?.viewControllers)") } else { curVc.showViewController(vcToShow, sender: curVc) } } |
即可避免重复的视图被push到navi controller中了。
转载请注明：在路上 » ［已解决］swift中showViewController出错：Pushing the same view controller instance more than once is not supported