I have an NSTextField in my app. I want to be able to drag text into the field from other apps. When this happens, I want my text field to erase anything that's already in it, and then show the text from the drag.
How do I do this? I can't figure out to know the text came from a drag. At the moment it just inserts the text whereever I drop it.
唯一的方法是对其进行子类化并处理所有nsview中包含的draggingXYZ方法
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