我正在使用Swift 3在Xcode 8中开发应用程序，但我对iOS开发一般都很陌生。过去几天我在应用程序上取得了很好的进展，但今天模拟器在成功构建后仍然崩溃。它打印出某种崩溃日志，但我不知道它试图告诉我什么。它突出显示了AppDelegate中的第一个方法，并给出了SIGABRT错误。我最近的更改是我尝试从uitableviewcell按下导航到新视图，并将数据从第一个视图传递到下一个视图。我将发布我认为相关的方法以及崩溃报告。我已经尝试查找SIGABRT错误，但它似乎是一个非特定的错误，阅读错误报告的唯一指南来自iOS 5上的2011年。任何帮助都非常感谢。
崩溃报告：
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[mondayOct3_xmlParse.ViewController numberOfComponentsInPickerView:]: unrecognized selector sent to instance 0x7fadd2030000'
*** First throw call stack:
(
0 CoreFoundation 0x000000010633234b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x0000000105d9321e objc_exception_throw + 48
2 CoreFoundation 0x00000001063a1f34 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
3 CoreFoundation 0x00000001062b7c15 ___forwarding___ + 1013
4 CoreFoundation 0x00000001062b7798 _CF_forwarding_prep_0 + 120
5 UIKit 0x000000010673512f -[UIPickerView _delegateNumberOfComponents] + 56
6 UIKit 0x000000010673425b -[UIPickerView _updateSelectedRows] + 91
7 UIKit 0x000000010673432a -[UIPickerView didMoveToWindow] + 102
8 UIKit 0x0000000106813ae5 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 1799
9 UIKit 0x0000000106813711 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 819
10 UIKit 0x0000000106813711 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 819
11 UIKit 0x0000000106806aa8 __45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 151
12 UIKit 0x0000000106806996 -[UIView(Hierarchy) _postMovedFromSuperview:] + 857
13 UIKit 0x00000001068166df -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1982
14 UIKit 0x0000000106804b95 -[UIView(Hierarchy) addSubview:] + 838
15 UIKit 0x0000000106c212bf -[UINavigationTransitionView transition:fromView:toView:] + 645
16 UIKit 0x0000000106938b1b -[UINavigationController _startTransition:fromViewController:toViewController:] + 3314
17 UIKit 0x00000001069390b9 -[UINavigationController _startDeferredTransitionIfNeeded:] + 874
18 UIKit 0x000000010693a19b -[UINavigationController __viewWillLayoutSubviews] + 58
19 UIKit 0x0000000106b311b7 -[UILayoutContainerView layoutSubviews] + 223
20 UIKit 0x000000010681a344 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1237
21 QuartzCore 0x000000010b7dbcdc -[CALayer layoutSublayers] + 146
22 QuartzCore 0x000000010b7cf7a0 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 366
23 QuartzCore 0x000000010b7cf61e _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
24 QuartzCore 0x000000010b75d62c _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 280
25 QuartzCore 0x000000010b78a713 _ZN2CA11Transaction6commitEv + 475
26 QuartzCore 0x000000010b78b083 _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 113
27 CoreFoundation 0x00000001062d6e17 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
28 CoreFoundation 0x00000001062d6d87 __CFRunLoopDoObservers + 391
29 CoreFoundation 0x00000001062bb4b6 CFRunLoopRunSpecific + 454
30 UIKit 0x000000010674fdb6 -[UIApplication _run] + 434
31 UIKit 0x0000000106755f34 UIApplicationMain + 159
32 mondayOct3_xmlParse 0x000000010579067f main + 111
33 libdyld.dylib 0x000000010995c68d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
UITableView功能
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
self.performSegue(withIdentifier: "detailViewSegue", sender: indexPath);
}
func perpareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let destination = segue.destination as? viewTwoViewController
let index = (sender as! NSIndexPath).row;
destination?.newsStory = newsStories[index]
destination?.storyExpires = storiesExpire[index]
destination?.storySeverity = storiesSeverity[index]
destination?.storySummary = storiesSummary[index]
destination?.storyEffective = storiesEffective[index]
destination?.storyUrgency = storiesUrgency[index]
destination?.storyCertainty = storiesCertainty[index]
// if (polygon.count != 0){
// destination?.polygon = polygon[index]
// }
}
接收视图 class viewTwoViewController：UIViewController {
@IBOutlet weak var titleOutlet: UILabel!
@IBOutlet weak var expiresOutlet: UILabel!
@IBOutlet weak var severityOutlet: UILabel!
@IBOutlet weak var effectiveOutlet: UILabel!
@IBOutlet weak var urgencyOutlet: UILabel!
@IBOutlet weak var certaintyOutlet: UILabel!
@IBOutlet weak var summaryOutlet: UILabel!
var newsStory = ""
var storyExpires = ""
var storySeverity = ""
var storySummary = ""
var storyEffective = ""
var storyUrgency = ""
var storyCertainty = ""
override func viewDidLoad() {
super.viewDidLoad()
titleOutlet.text = newsStory
expiresOutlet.text = storyExpires
severityOutlet.text = storySeverity
effectiveOutlet.text = storyEffective
urgencyOutlet.text = storyUrgency
certaintyOutlet.text = storyCertainty
summaryOutlet.text = storySummary
// Do any additional setup after loading the view.
}
以下是错误引用的pickerview函数：
private func numberOfComponentsInPickerView(_ pickerView: UIPickerView) -> Int
{
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int
{
return state.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String!
{
return state[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row:Int, inComponent component:Int)
{
stateAbbrev = state[row]
url = NSURL(string: "http://alerts.weather.gov/cap/"+stateAbbrev+".php?x=0")
parseXML()
tableViewOutlet.reloadData()
}
答案 0 :(得分：0)
Swift 3中组件数量的签名功能不同。应该是：
func numberOfComponents(in pickerView: UIPickerView) -> Int {
...
}