ios - 无法使用 textContainer 选择 UITextView

Question

我正在使用带有 textContainer 属性和属性字符串的 UITextView...

UITextView *textView = [[UITextView alloc] initWithFrame:textViewFrame textContainer:textContainer];

但是这个 textview 变得不可选择了。

我尝试子类化 UITextView 并将 YES 返回给 canBecomeFirstResponder 方法，但它仍然无法选择..

如何解决这个问题？

---

这是我的部分代码

NSString * decodedHtmlString = [[contentString stringByDecodingHTMLEntities] stringWithNewLinesAsBRs];

NSString * plainText = [decodedHtmlString stringByConvertingHTMLToPlainText];

NSData * dataString = [decodedHtmlString dataUsingEncoding:NSUnicodeStringEncoding allowLossyConversion:NO];

NSDictionary * attributedOptions = [NSDictionary dictionaryWithObjectsAndKeys:
                                    NSHTMLTextDocumentType, NSDocumentTypeDocumentAttribute
                                    , nil];



NSAttributedString * attributesString = [[NSAttributedString alloc] initWithData:dataString
                                                                         options:attributedOptions
                                                              documentAttributes:nil
                                                                           error:nil];


/////direction
NSMutableParagraphStyle * paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.alignment = NSTextAlignmentRight;


NSMutableAttributedString * mutableAttrString = [[NSMutableAttributedString alloc] initWithAttributedString:attributesString];
[mutableAttrString addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Arial" size:29.0] range:NSMakeRange(0, plainText.length)];
[mutableAttrString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, plainText.length)];



NSTextStorage * textStorage = [[NSTextStorage alloc] initWithAttributedString:mutableAttrString];
NSLayoutManager * layoutManager = [[NSLayoutManager alloc] init];
[textStorage addLayoutManager:layoutManager];


NSUInteger lastRenderedGlyph = 0;
CGFloat currentXOffset = 0;
while (lastRenderedGlyph < layoutManager.numberOfGlyphs) {

    CGRect textViewFrame = CGRectMake(currentXOffset, 0, 500, 700);
    CGSize columnSize = textViewFrame.size;

    NSTextContainer *textContainer = [[NSTextContainer alloc] initWithSize:columnSize];
    [layoutManager addTextContainer:textContainer];

    UITextView *textView = [[UITextView alloc] initWithFrame:textViewFrame
                                               textContainer:textContainer];
    [textView setSelectable:YES];
    textView.scrollEnabled = NO;

    currentXOffset += CGRectGetWidth(textViewFrame);

    [self.scrollView addSubView:textView];
    lastRenderedGlyph = NSMaxRange([layoutManager glyphRangeForTextContainer:textContainer]);
}

Answer 1

使用 textContainer 似乎无法选择 UITextView。因此，作为解决方法，我们可以从 textContainer 的范围中检索 attributedString，然后将其设置为 UITextView 的 attributedText 属性。

    NSAttributedString * subAttributedString = [mutableAttrString attributedSubstringFromRange:[layoutManager glyphRangeForTextContainer:textContainer]];
    [textView setAttributedText: subAttributedString];

然后选择工作。