[英]Is NSTextAttachment image animation possible?
Using iOS7 I'm able to display images in a UITextView with no problem using NSTextAttachments.使用 iOS7 我能够在 UITextView 中显示图像,使用 NSTextAttachments 没有问题。 However, is it possible to show animated images in a UITextView using NSTextAttachments?但是,是否可以使用 NSTextAttachments 在 UITextView 中显示动画图像? If so, how?如果是这样,如何?
To animate images in NSTextAttachment you need to attach a CADisplayLink
to the UITextView
and change the images manually.要在 NSTextAttachment 中为图像设置动画,您需要将CADisplayLink
附加到UITextView
并手动更改图像。 After that you should call layoutManager.invalidateDisplay(forCharacterRange: ATTACHMENT_RANGE)
to refresh the textView layout之后你应该调用layoutManager.invalidateDisplay(forCharacterRange: ATTACHMENT_RANGE)
来刷新layoutManager.invalidateDisplay(forCharacterRange: ATTACHMENT_RANGE)
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