iphone - 如何在不破坏代码的情况下在 Objective-C 中拆分字符串

Question

当我在字符串中插入换行符时，Xcode 会抛出各种错误。例如，这失败了:

if (newMaximumNumberOfSides > 12) {
    NSLog(@"Invalid maximum number of sides: %i is greater than 
            the maximum of 12 allowed.", newMaximumNumberOfSides);
}

但这行得通:

if (newMaximumNumberOfSides > 12) {
    NSLog(@"Invalid maximum number of sides: %i is greater than the maximum of 12 allowed.", 
          newMaximumNumberOfSides);
}

我更喜欢前者，因为它看起来更清晰(较短的行)，但代码会中断。处理这个问题的最佳方法是什么？ (子问题:任何语法指南中都引用了这个吗？我在我所有的书中都搜索了“换行符”，但没有任何效果。)

Answer 1

所有这些都应该有效:

NSString *s = @"this" \
        @" is a" \
        @" very long" \
        @" string!";

    NSLog(s);


    NSString *s1 = @"this" 
        @" is a" 
        @" very long" 
        @" string!";

    NSLog(s1);

    NSString *s2 = @"this"
        " is a"
        " very long"
        " string!";

    NSLog(s2);

    NSString *s3 = @"this\
 is a\
 very long\
 string!";

    NSLog(s3);