在Textview中添加旋转木马视图

Question

我正在将数据添加到TextView到sqlite database。在一些Para或Line数据之后，我有大约30到35个图像要添加到其中，这是我通过NSTextAttachment完成的。现在，我想做的是，只要Carousel View中有超过2个图像，然后还有剩余的数据。看看我的代码。我尝试了不同的方法，但没有成功。任何帮助都将不胜感激。

NSTextAttachment *textAttachment1 = [[NSTextAttachment alloc] init];
    textAttachment1.image = [UIImage imageNamed:@"img1.png"];
    NSTextAttachment *textAttachment = [[NSTextAttachment alloc] init];
    textAttachment.image = [UIImage imageNamed:@"img2.png"];
    NSTextAttachment *textAttachment2 = [[NSTextAttachment alloc] init];
    textAttachment2.image = [UIImage imageNamed:@"img3.png"];
    NSTextAttachment *textAttachment3 = [[NSTextAttachment alloc] init];
    CGFloat oldWidth1 = textAttachment1.image.size.width;
    CGFloat oldWidth = textAttachment.image.size.width;
    CGFloat oldWidth2 = textAttachment2.image.size.width;
    CGFloat scaleFactor1 = oldWidth1 / (self.textViewResearch.frame.size.width + 70);
    CGFloat scaleFactor = oldWidth / (self.textViewResearch.frame.size.width + 70);
    CGFloat scaleFactor2 = oldWidth2 / (self.textViewResearch.frame.size.width + 70);
    textAttachment1.image = [UIImage imageWithCGImage:textAttachment1.image.CGImage scale:scaleFactor1 orientation:UIImageOrientationUp];
    textAttachment.image = [UIImage imageWithCGImage:textAttachment.image.CGImage scale:scaleFactor orientation:UIImageOrientationUp];
    textAttachment2.image = [UIImage imageWithCGImage:textAttachment2.image.CGImage scale:scaleFactor2 orientation:UIImageOrientationUp];
    NSAttributedString *attrStringWithImage1 = [NSAttributedString attributedStringWithAttachment:textAttachment1];
    NSAttributedString *attrStringWithImage = [NSAttributedString attributedStringWithAttachment:textAttachment];
    NSAttributedString *attrStringWithImage2 = [NSAttributedString attributedStringWithAttachment:textAttachment2];
    [attributedString replaceCharactersInRange:NSMakeRange(0, 0) withAttributedString:attrStringWithImage1];
    [attributedString replaceCharactersInRange:NSMakeRange(13740, 0) withAttributedString:attrStringWithImage];
    [attributedString replaceCharactersInRange:NSMakeRange(13741, 0) withAttributedString:attrStringWithImage2];
     self.textView.attributedText = attributedString;

Answer 1

如果我理解正确，您希望将一个图像放置在文本视图中，并让文本围绕它流动。如果有两个以上的图像，您希望有一个旋转木马，iCarousel类的实例。

在UITextView的实例中拥有一个子视图，并让文本在其周围浮动，这是一项已知的任务。最简单的方法似乎是使用这样的文本容器的排除路径：

// Get the dimension of the subview
iCarousel *subview = …; 
UIBezierPath *subviewPath = [UIBezierPath bezierPathWithRect:subview.frame];
// Somewhere you should add it 
UITextView *textView = …; // Wherever it comes from
[textView addSubview:subview];
// Let the text flow around it
UITextContainer *textContainer = textView.textContainer; // The text container is the region text is laid out in. 
textContainer.exclusionPaths = [subviewPath]; // Do not lay out in this region.

当然，无论何时子视图的框架发生更改，都必须更改排除区域。

一种更灵活、更复杂的方法是自己进行文本布局。如果上述方法不起作用，请告诉我。我将为此添加代码。