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我正在使用InputMethodKit编写一个快速输入法 (IM) 。IM 基本上可以工作，我从 Konsole 中获得击键inputText()并查看我的日志消息。

现在我composedString(_ sender: Any!)像这样快速实现：

override func composedString(_ sender: Any!) -> Any! {
  let ret = NSMutableString().append("test")
  return ret
}

我知道composedString(_ sender: Any!)我打电话时系统会调用它updateComposition()。情况确实如此，但composedString(_ sender: Any!)确实会崩溃显示该输出：

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libswiftCore.dylib              0x00007fff2ccbd680 swift_unknownObjectRetain + 32
1   com.IBNSoft.inputmethod.MyApp   0x000000010c08c491 @objc InputController.composedString(_:) + 33
2   com.apple.InputMethodKit        0x00007fff4670358d -[IMKInputController updateComposition] + 45
3   com.IBNSoft.inputmethod.MyApp   0x000000010c08a5bf closure #1 in InputController.inputText(_:client:) + 703 (InputController.swift:25)
4   com.IBNSoft.inputmethod.MyApp   0x000000010c086740 thunk for @escaping @callee_guaranteed () -> () + 48
5   libdispatch.dylib               0x00007fff20441603 _dispatch_call_block_and_release + 12
6   libdispatch.dylib               0x00007fff204427e6 _dispatch_client_callout + 8
7   libdispatch.dylib               0x00007fff2044eb2f _dispatch_main_queue_callback_4CF + 940
8   com.apple.CoreFoundation        0x00007fff207226f8 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
9   com.apple.CoreFoundation        0x00007fff206e48e2 __CFRunLoopRun + 2755
10  com.apple.CoreFoundation        0x00007fff206e375c CFRunLoopRunSpecific + 563
11  com.apple.HIToolbox             0x00007fff28905203 RunCurrentEventLoopInMode + 292
12  com.apple.HIToolbox             0x00007fff28904f65 ReceiveNextEventCommon + 587
13  com.apple.HIToolbox             0x00007fff28904d03 _BlockUntilNextEventMatchingListInModeWithFilter + 70
14  com.apple.AppKit                0x00007fff22edfb32 _DPSNextEvent + 864
15  com.apple.AppKit                0x00007fff22ede305 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1364
16  com.apple.AppKit                0x00007fff22ed0679 -[NSApplication run] + 586
17  com.apple.AppKit                0x00007fff22ea485c NSApplicationMain + 816
18  com.IBNSoft.inputmethod.MyApp   0x000000010c08935d main + 13 (AppDelegate.swift:19)
19  libdyld.dylib                   0x00007fff20607f3d start + 1

苹果文档说composedString(_:)：

返回值：

当前组合的字符串，可以是 NSString 或 NSAttributedString 对象。返回的对象应该是一个自动释放的对象。

我想问题是我没有NSMutableString正确分配“自动释放和保留”。任何人都可以阐明崩溃的问题是什么以及如何解决它。

谢谢

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0 回答 0