Drawing text, newline character, Quartz 2D

I was trying to draw a text in Quartz. For example:

20.0%
1/开发者_Python百科5

I thought I could do something like this:

NSString *label = [NSString stringWithFormat:@"%1.1f%%\n1/5",someValue * 100];

However the newline gets drawn as a box. Is there a way around this? Thanks!

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Split up the string into separate text elements, each on their own line.