Search code examples
androidiostext-rendering

Calculate text width on iOS given UIView

In Windows world you can do this to get text width:

SIZE size;
GetTextExtentPoint(DC, "hello", strlen("hello"), &size)
printf("x = %i y = %i\n", size.x, size.y);
    // will print x = 30, y = 15 (for instance)

How can I easily do that on iOS, provided that I have UIView handle on hand?

Solution

  • For iOS (I'll let someone more knowledgeable in Android development answer the second part), you'll want to use a variant of sizeWithFont:. Depending on whether or not you wish to allow multiple lines you should check out the various methods explained in the documentation I linked.

    The one I typically find most useful is sizeWithFont:constainedToSize: where I set the constrained size to have the limited width that I have available in a view, and the height to CGFLOAT_MAX, which allows the label to use up as much vertical space as needed (since I often have labels within vertically scrolling views).