我们的 App Find a Foundation 崩溃，仅在 iOS11 中。如何解决？
Fatal Exception: NSRangeException
NSMutableRLEArray replaceObjectsInRange:withObject:length:: Out of bounds
0 CoreFoundation 0x184f8bd38 __exceptionPreprocess
1 libobjc.A.dylib 0x1844a0528 objc_exception_throw
2 CoreFoundation 0x184f8bc80 -[NSException initWithCoder:]
3 Foundation 0x18587c168 -[NSMutableRLEArray replaceObjectsInRange:withObject:length:]
4 Foundation 0x18588262c -[NSConcreteMutableAttributedString replaceCharactersInRange:withAttributedString:]
5 CoreFoundation 0x184e65bec -[__NSArrayM enumerateObjectsWithOptions:usingBlock:]
6 UIKit 0x18ec677b8 -[UILayoutManagerBasedDraggableGeometry draggableObjectsForTextRange:]