我找不到任何与a中显示的文本值相关的参数NSTextView.我知道a NSTextView使用复杂的结构(有NSLayoutManager...等),但我找不到修改当前text值的有效方法.
我收到了一堆崩溃报告,看起来很像下面这个范围的不同值.有时范围不是0-x,可以说是2-x
特定于应用程序的信息:*由于未捕获的异常终止应用程序\'NSRangeException \',原因:\'* - [NSBigMutableString substringWithRange:]:范围{0,69}超出范围; 字符串长度0 \'
Last Exception Backtrace:
0 CoreFoundation 0x2e879e83 __exceptionPreprocess + 131
1 libobjc.A.dylib 0x38bd66c7 objc_exception_throw + 38
2 CoreFoundation 0x2e879dc5 +[NSException raise:format:] + 112
3 Foundation 0x2f1a1bd1 -[NSString substringWithRange:] + 120
4 UIKit 0x311b2815 -[NSTextStorage(UIKitUndoExtensions) _undoRedoAttributedSubstringFromRange:] + 132
5 UIKit 0x315d9679 -[_UITextUndoOperationTyping undoRedo] + 296
6 Foundation 0x2f296453 -[_NSUndoStack popAndInvoke] + 250
7 Foundation 0x2f2952ef -[NSUndoManager undoNestedGroup] + 454
8 UIKit 0x3127a147 -[UIApplication alertView:clickedButtonAtIndex:] + 142
9 UIKit 0x31216449 -[_UIModalItemsCoordinator _notifyDelegateModalItem:tappedButtonAtIndex:] + 144 …Run Code Online (Sandbox Code Playgroud)