https://developer.apple.com/library/ios/documentation/Cocoa/Reference/ApplicationKit/Classes/NSMutableParagraphStyle_Class/#//apple_ref/occ/instp/NSMutableParagraphStyle/paragraphSpacingparagraphSpacing和paragraphSpacingBefore有什麼區別? (在NSMutableParagraphStyle)
我已經閱讀這篇文章。
但我無法準確理解。
paragraphSpacing和paragraphSpacingBefore有什麼區別? (在NSMutableParagraphStyle中)
Img請。
我不能爲英文理解...
哪裏paragraphSpacingBefore?