目标C中的简单字符串连接 [英] Simple string concatenation in Objective C

问题描述

我有一个名为'you'的NSString，其值为"This is a you string！".

I have an NSString named 'you' with value "This is a you string!".

我要在"you"中添加"123"，我该怎么办?

I want to concat "123" in 'you', how can I do it?

我正在使用此代码，它给出了一个错误.

I am using this code and it is giving an error.

you=[you stringByAppendingString:@"123"];

推荐答案

此处的代码对我有用

NSString *s = @"avant";
s = [s stringByAppendingString:@" - après"];
NSLog(@"%@", s);

2012-01-13 11:48:59.442 tabbar [604:207] avant-après

2012-01-13 11:48:59.442 tabbar[604:207] avant - après

所以我的猜测是您的you是一个错误的指针，不是nil而不是您认为的NSString.

So my guess is that your you is a bad pointer that is not nil and not the NSString you think it have.

在调用之前您是否尝试过对该值进行NSLog?

Have you try an NSLog on that value before the call?

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