我正在UIButton Click事件侦听器中执行条件segue。我的猜测是在情节提要中的“ pathanViewController”和“ dekhunViewController”之间以“ pathanToDekhun”标识符绘制的。但是我得到NsInternalInconsistencyException作为
*** Assertion failure in -[UIKeyboardTaskQueue waitUntilAllTasksAreFinished], /SourceCache/UIKit_Sim/UIKit-3318.16.14/Keyboard/UIKeyboardTaskQueue.m:374
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UIKeyboardTaskQueue waitUntilAllTasksAreFinished] may only be called from the main thread.'
单击按钮后,我执行了外部api调用,并且在成功返回消息后,我使用performSegueWithIdentifier调用了segue。但是segue从未真正发生过。以下是我在pathanViewController中的代码部分。请让我知道我做错了。
@IBAction func sendBtnListener(sender: AnyObject) {
if !self.commentSection.text.isEmpty {
var submitVoganti = DataSerialization(brandName: self.brandName!, rating: Int(self.sliderStatus.value*5), commentText: self.commentSection.text, anonymous: switchBox.on ? true : false)
var dataSet = DataSet()
dataSet.postComment(submitVoganti.toJson(),{
(id) in
self.performSegueWithIdentifier("pathanToDekhun", sender: self)
println(id)
})
} else{
println("Comment field should not be empty")
}
}
//Check whether a segue should be triggered or not
override func shouldPerformSegueWithIdentifier(identifier: String?, sender: AnyObject?) -> Bool {
if identifier == "pathanToDekhun" {
return false
}
// by default, transition
return true
}
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
var dekhunScene = segue.destinationViewController as ThirdViewController
dekhunScene.keyword = self.brandName
}
最佳答案
我做错了是我的performSegueWithIdentifier在主队列中没有被调用。这就是为什么它引发异常。我现在正在做的只是按如下方式编辑我的代码-
dataSet.postComment(submitVoganti.toJson(),{
(id) in
dispatch_async(dispatch_get_main_queue()){
self.performSegueWithIdentifier("pathanToDekhun", sender: self)
}
println(id)
})
并注释掉“替代功能func shouldPerformSegueWithIdentifier”功能。而已。