从今天扩展程序打开时 iOS 应用程序崩溃

Question

Crash when open containing app from today extension 可能重复。

我正在尝试使用自定义 URL 方案从今天的扩展小部件打开包含应用程序。我在扩展中使用的代码是：

let urlStr = String(format: "myapp://?device_id=%@", deviceId!)
let url = NSURL(string: urlStr)
self.extensionContext!.openURL(url!, completionHandler: nil)

但是，包含应用程序在打开时崩溃：

Thread : Crashed: com.apple.main-thread
0  CoreFoundation                 0x0000000103e572dc CFStringCreateCopy + 28
1  libswiftFoundation.dylib       0x0000000105f02a44 _TF10Foundation24_convertNSStringToStringFCSo8NSStringSS + 148
2  MyApp                          0x00000001017a9055 @objc MyApp.CLAppDelegate.application (MyApp.CLAppDelegate)(ObjectiveC.UIApplication, openURL : ObjectiveC.NSURL, sourceApplication : Swift.String, annotation : Swift.Optional<Swift.AnyObject>) -> Swift.Bool (CLAppDelegate.swift)
3  UIKit                          0x0000000104898685 -[UIApplication _applicationOpenURL:payload:] + 185
4  UIKit                          0x00000001048a0816 -[UIApplication _handleNonLaunchSpecificActions:forScene:withTransitionContext:] + 2380
5  UIKit                          0x00000001048a42e8 __88-[UIApplication _handleApplicationLifecycleEventWithScene:transitionContext:completion:]_block_invoke + 196
6  UIKit                          0x00000001048a4215 -[UIApplication _handleApplicationLifecycleEventWithScene:transitionContext:completion:] + 349
7  UIKit                          0x000000010488f31a -[UIApplication scene:didUpdateWithDiff:transitionContext:completion:] + 486
8  FrontBoardServices             0x000000010903a2a3 __31-[FBSSerialQueue performAsync:]_block_invoke + 16
9  CoreFoundation                 0x0000000103eb553c __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 12
10 CoreFoundation                 0x0000000103eab285 __CFRunLoopDoBlocks + 341
11 CoreFoundation                 0x0000000103eaaa43 __CFRunLoopRun + 851
12 CoreFoundation                 0x0000000103eaa486 CFRunLoopRunSpecific + 470
13 GraphicsServices               0x0000000106e6e9f0 GSEventRunModal + 161
14 UIKit                          0x0000000104891420 UIApplicationMain + 1282
15 MyApp                       0x00000001017ac57e top_level_code (CLAppDelegate.swift:16)
16 MyApp                       0x00000001017ac5ba main (CLAppDelegate.swift)
17 libdyld.dylib                  0x0000000106155145 start + 1

从其他任何地方打开时，相同的自定义 URL 方案都有效。

使用 Xcode 6.1.1，部署目标 8.1。

Answer 1

设法自己解决了这个问题，并认为我会发布解决方案。

事实证明，由 Xcode 先前版本之一自动完成的 UIApplicationDelegate 声明是不正确的：

func application(application: UIApplication, 
                 openURL url: NSURL, 
                 sourceApplication: String!,   // Wrong
                 annotation: AnyObject?) -> Bool

应该是：

func application(application: UIApplication, 
                 openURL url: NSURL, 
                 sourceApplication: String?,   // OK
                 annotation: AnyObject?) -> Bool

（sourceApplication 必须是 String? 而不是 String!）

希望这对某人有所帮助。