iOS实现文字环绕图片textView布局

CGRect textViewRect = CGRectInset(self.view.bounds, 10.0, 20.0);

    _myTextView = [[UITextView alloc] initWithFrame:textViewRect];

    _myTextView.text = text;

    _myTextView.editable = NO;

    _myTextView.delegate = self;

    [self.view insertSubview:_myTextView belowSubview:_imageView];

   

    //使用TextView的_textView.textContainer.exclusionPath属性指定环绕路径

    _myTextView.textContainer.exclusionPaths = @[[self translatedBezierPath]];

//为了让图片跟随textView一起滚动，必须在滚动监听里动态改变imageView的y

-(void)scrollViewDidScroll:(UIScrollView *)scrollView{

    _imageView.frame  = CGRectMake(_imageView.frame.origin.x,_imageViewY-scrollView.contentOffset.y,_imageView.frame.size.width , _imageView.frame.size.height);

   

}

- (UIBezierPath *)translatedBezierPath

{

    //坐标转换，原先imageView默认是以self.view作为参考系，现在要设置textView的环绕，所以将参考坐标系换成textView

    CGRect imageRect = [_myTextView convertRect:_imageView.frame fromView:self.view];

    //将UIBezierPath设置为图片frame

    UIBezierPath *newPath = [UIBezierPath bezierPathWithRect:imageRect];

    return newPath;

}