ios - 如何获取大括号之间的子字符串？

Question

我有一个这样的字符串。

NSString *myString = @"{53} balloons";

如何获取子字符串 53 ？

Answer 1

NSString *myString = @"{53} balloons";
NSRange start = [myString rangeOfString:@"{"];
NSRange end = [myString rangeOfString:@"}"];
if (start.location != NSNotFound && end.location != NSNotFound && end.location > start.location) {
    NSString *betweenBraces = [myString substringWithRange:NSMakeRange(start.location+1, end.location-(start.location+1))];
}

编辑:添加了范围检查，感谢 Keab42 - 好点。