段落间距和段落间距之前有什么区别？ （以NSMutableParagraphStyle形式）

Question

https://developer.apple.com/library/ios/documentation/Cocoa/Reference/ApplicationKit/Classes/NSMutableParagraphStyle_Class/#//apple_ref/occ/instp/NSMutableParagraphStyle/paragraphSpacing

I read already this post.

But I can't understanding exactly.

What the difference between paragraphSpacing and paragraphSpacingBefore? (in NSMutableParagraphStyle)

Img Please.

I can't understanding for english...

url : here click img

Where is paragraphSpacingBefore ?

Answer 1

paragraphSpacing https://developer.apple.com/library/ios/documentation/Cocoa/Reference/ApplicationKit/Classes/NSMutableParagraphStyle_Class/#//apple_ref/occ/instp/NSMutableParagraphStyle/paragraphSpacing

"This property contains the space (measured in points) added at the end of the paragraph to separate it from the following paragraph."

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paragraphSpacingBefore https://developer.apple.com/library/ios/documentation/Cocoa/Reference/ApplicationKit/Classes/NSMutableParagraphStyle_Class/#//apple_ref/occ/instp/NSMutableParagraphStyle/paragraphSpacingBefore

This property contains the space (measured in points) between the paragraph's top and the beginning of its text content.