Question

我有一个非常简单的执行，但由于某种原因它崩溃了。有什么想法吗？

import UIKit  
class ViewController: UIViewController {

@IBOutlet var myTextField: UITextField!
@IBOutlet var resultsLabel: UILabel!

@IBAction func pressButton(sender: AnyObject) {
    let diceRoll = String(arc4random_uniform(UInt32(6)))
    print(diceRoll)
}

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

已添加崩溃日志

2016-02-06 16：24：32.358 GuessingGame [6330：496415] *终止应用由于未被捕获的异常'NSUnknownKeyException'，原因：'[ setValue：forUndefinedKey：]：此类不是键值符合编码的关键TextField。' *第一次抛出调用堆栈：（0 CoreFoundation 0x000000010960ae65 exceptionPreprocess + 165 1 libobjc.A.dylib 0x000000010b34adeb objc_exception_throw + 48 2 CoreFoundation 0x000000010960aaa9 - [NSException raise] + 9 3 基金会0x00000001099d39bb - [NSObject（NSKeyValueCoding） setValue：forKey：] + 288 4 UIKit 0x0000000109fb6320 - [UIViewController setValue：forKey：] + 88 5 UIKit 0x000000010a1e4f41 - [UIRuntimeOutletConnection connect] + 109 6 CoreFoundation 0x000000010954b4a0 - [NSArray makeObjectsPerformSelector：] + 224 7 UIKit 0x000000010a1e3924 - [UINib instantiateWithOwner：options：] + 1864 8 UIKit 0x0000000109fbceea - [UIViewController _loadViewFromNibNamed：bundle：] + 381 9 UIKit 0x0000000109fbd816 - [UIViewController loadView] + 178 10 UIKit 0x0000000109fbdb74 - [UIViewController loadViewIfRequired] + 138 11 UIKit 0x0000000109fbe2e7 - [UIViewController view] + 27 12 UIKit 0x0000000109e94ab0 - [UIWindow addRootViewControllerViewIfPossible] + 61 13 UIKit 0x0000000109e95199 - [UIWindow _setHidden：forced：] + 282 14 UIKit 0x0000000109ea6c2e - [UIWindow makeKeyAndVisible] + 42 15 UIKit 0x0000000109e1f663 - [UIApplication _callInitializationDelegatesForMainScene：transitionContext：] + 4131 16 UIKit 0x0000000109e25cc6 - [UIApplication _runWithMainScene：transitionContext：completion：] + 1760 17 UIKit 0x0000000109e22e7b - [UIApplication workspaceDidEndTransaction：] + 188 18 FrontBoardServices 0x000000010d1df754 - [FBSSerialQueue _performNext] + 192 19 FrontBoardServices 0x000000010d1dfac2 - [FBSSerialQueue _performNextFromRunLoopSource] + 45 20 CoreFoundation 0x0000000109536a31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17 21 CoreFoundation 0x000000010952c95c __CFRunLoopDoSources0 + 556 22 CoreFoundation 0x000000010952be13 __CFRunLoopRun + 867 23 CoreFoundation 0x000000010952b828 CFRunLoopRunSpecific + 488 24 UIKit 0x0000000109e227cd - [UIApplication _run] + 402 25 UIKit 0x0000000109e27610 UIApplicationMain + 171 26 GuessingGame 0x000000010942b4dd main + 109 27 libdyld.dylib 0x000000010be5392d start + 1）libc ++ abi.dylib：以未捕获的异常终止输入NSException（lldb）

Answer 1

最有可能的原因是您在代码中将您的IBOutlet从TextField重命名为myTextField（或者添加了一个新链接，但没有从IB中的控件中删除旧引用）。

Swift 2 arc4random_uniform崩溃？

1 个答案: