ios如何将UIImage添加到UITextView异步？

Question

我可以使用UIImageView+AFNetworking异步地分别添加图像

[imageView setImageWithURL:[NSURL URLWithString:[self.data valueForKey:@"image_link"]]];

我还可以通过以下方式向UITextView添加图像

UITextView *text = [[UITextView alloc] init];
UIImageView *imageView = [UIImageView new];
[imageView setImage:[UIImage imageNamed:@"image.png"]];
CGRect aRect = CGRectMake(0, 0, 125, 120);
[imageView setFrame:aRect];

UIBezierPath *exclusionPath = [UIBezierPath bezierPathWithRect:aRect];
text.textContainer.exclusionPaths = @[exclusionPath];
[text addSubview:imageView];

但是我不能在UITextView中异步地添加图像，比如

UITextView *text = [[UITextView alloc] init];
UIImageView *imageView = [UIImageView new];
[imageView setImageWithURL:[NSURL URLWithString:[self.data valueForKey:@"image_link"]]];
CGRect aRect = CGRectMake(0, 0, 125, 120);
[imageView setFrame:aRect];
UIBezierPath *exclusionPath = [UIBezierPath bezierPathWithRect:aRect];
text.textContainer.exclusionPaths = @[exclusionPath];
[text addSubview:imageView];

那么，如何在UITextView中异步添加图像呢？

Answer 1

使用调度：

dispatch_async(dispatch_get_main_queue(), ^{
       // async UI update here
    });