在Mac OS X上相当于GetTextExtentPoint32

Question

I am working on a cross platform library that needs to draw text using fonts into a device context. The width of the text combined with the user selected font is proving difficult to calculate.

In Windows we use BOOL GetTextExtentPoint32(HDC hdc, LPCTSTR lpString, int cbString, LPSIZE lpSize) this works without problem. On Mac OS X we used StringWidth(ConstStr255Param s), however since OS X 10.4 this has been deprecated. So my question is, how would one go about successfully calculating the width of a string on OS X 10.4 and higher.

Answer 1

对于可可，如果对容器的宽度而不是高度使用任意大的值，那么利用计算字符串高度的技术应该可以帮助您。