以编程方式在具有多个文本容器的布局管理器中的UITextView中选择文本

Question

如果布局管理器中只有一个TextContainer，那么操作系统将处理用户交互。但是有了多个文本容器，我在某个地方读到它不是开箱即用的。

以下是我已经使用过的一些没有运气的事情。

NSRange range = NSMakeRange(5, 10);

UITextPosition *from = [textView positionFromPosition:[textView beginningOfDocument] offset:range.location];
UITextPosition *to = [textView positionFromPosition:from offset:range.length];
[textView select:self];
[textView setSelectedTextRange:[textView textRangeFromPosition:from toPosition:to]];

和

NSRange range = NSMakeRange(5, 10);
textView.selectedRange = range;

如果只有一个TextContainer，我能够让它工作，但我希望它有多个容器。

这是我想以编程方式

实现的

更新： 添加了我正在处理的代码

- (void)didDoubleTap:(id)sender {
    UITapGestureRecognizer *tapGesture = (UITapGestureRecognizer *)sender;
            if (tapGesture.state == UIGestureRecognizerStateEnded) {
                CGPoint point = [tapGesture locationInView:self];
                for (UITextView *textView in self.textViews) {
                    if (CGRectContainsPoint(textView.frame, point)) {
                        textView.selectable = YES;
                        [textView becomeFirstResponder];
                        NSInteger glypIndex = [self.articleLayoutManager glyphIndexForPoint:point inTextContainer:textView.textContainer];
                        NSLog(@"GlyphIndex : %ld",glypIndex);
                        NSRange wordRange = [self rangeForWordWithGlyphAtIndex:glypIndex];
                        wordRange.length += 5;//For testing purpose
                        NSLog(@"Got Range");
                        UITextPosition *beginning = textView.beginningOfDocument;
                        UITextPosition *start = [textView positionFromPosition:beginning offset:wordRange.location];
                        UITextPosition *end = [textView positionFromPosition:start offset:wordRange.length];
                        UITextRange *textRange = [textView textRangeFromPosition:start toPosition:end];

                        textView.selectedTextRange = textRange;
                        textView.selectedRange = wordRange;
                        UITextRange *textRange1 = [textView selectedTextRange];
                        CGRect wordRect = [self.articleLayoutManager boundingRectForGlyphRange:wordRange inTextContainer:textView.textContainer];
                        NSLog(@"Got Word Rect");
                        UIMenuController *theMenu = [UIMenuController sharedMenuController];
                        [theMenu setTargetRect:wordRect inView:textView];
                        [theMenu setMenuVisible:YES animated:YES];
                    }
                }
            }
}

感谢。