objective-c连接NSString [英] objective-c concatenate NSString

问题描述

我在连接NSString时遇到问题。

I have problems to concatenate NSString.

每次按下按钮我都希望将某些内容（aux）添加到我的字符串（myString）中。所以：

Each time I pushed a button I want that something ("aux") is added to my string ("myString"). so:

NSString *aux = [NSString stringWithFormat: @"%d", buttonIndex];

myString=[NSString stringWithFormat:@"%@/%@",posTargetaText,aux];

aux = nil;

我第一次按下按钮时效果不错，但第二次不起作用。

The first time i pushed the button it works good but the second it doesn't work.

有些帮助吗？

推荐答案

所以你当然可以使用 stringWithFormat ，但为什么不使用 stringByAppendingString ，因为那正是你想要做的？

So you can certainly use stringWithFormat, but why don't you use stringByAppendingString instead, since that's exactly what you want to do?

NSString *newString = [firstString stringByAppendingString:secondString];

除非你有令人信服的理由，否则你真的不需要使用可变字符串。

You really don't need to use a mutable string unless you have a compelling reason to.

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