问题
The line below returns a size with a larger height when I run it on an iOS8 device versus iOS7. It happens regardless of whether I'm building with iOS 7 or iOS 8 as my base SDK. Anyone else seeing this issue?
return [myString sizeWithAttributes:attributes];
回答1:
I answered my own question. The issue occurs when the string ends in a line break as below. This causes an issue because iOS 7 ignores trailing line breaks but iOS 8 doesn't.
myString = @"Some text.\n";
Removing the trailing line breaks before calling sizeWithAttributes: fixes the problem.
来源：https://stackoverflow.com/questions/25855472/nsstring-sizewithattributes-returns-different-height-in-ios-8-versus-ios-7