string 如何在 iPhone 上连接两个字符串？
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How to concatenate two strings on iPhone?
提问by Chilly Zhong
How to connect string "Hello" and string "World" to "HelloWorld"? Looks like "+" doesn't work.
如何将字符串“Hello”和字符串“World”连接到“HelloWorld”？看起来“+”不起作用。
回答by Garrett
NSString *string = [NSString stringWithFormat:@"%@%@", @"Hello", @"World"];
NSLog(@"%@", string);
That should do the trick, although I am sure there is a better way to do this, just out of memory. I also must say this is untestedso forgive me. Best thing is to find the stringWithFormat documentation for NSString.
这应该可以解决问题，尽管我确信有更好的方法可以做到这一点，只是内存不足。我还必须说这是未经测试的，所以请原谅我。最好的办法是找到 NSString 的 stringWithFormat 文档。
回答by Christopher
How about:
怎么样：
NSString *hello = @"Hello";
NSString *world = @"World";
NSString *helloWorld = [hello stringByAppendingString:world];
回答by Bill Heyman
If you have two literal strings, you can simply code:
如果您有两个文字字符串，您可以简单地编写代码：
NSString * myString = @"Hello" @"World";
This is a useful technique to break up long literal strings within your code.
这是在代码中分解长文本字符串的有用技术。
However, this will not work with string variables, where you'd want to use stringWithFormat: or stringByAppendingString:, as mentioned in the other responses.
但是，这不适用于字符串变量，您希望在其中使用 stringWithFormat: 或 stringByAppendingString:，如其他响应中所述。
回答by DaveJustDave
there's always NSMutableString..
总是有 NSMutableString ..
NSMutableString *myString = [NSMutableString stringWithString:@"Hello"];
[myString appendString: @"World"];
Note:
笔记：
NSMutableString *myString = @"Hello"; // won't work, literal strings aren't mutable
回答by raj
t3.text=[t1.text stringByAppendingString:t2.text];
回答by Ricardo Barroso
Bill, I like yout simple solution and I'd like to note that you can also eliminate the space between the two NSStrings:
比尔，我喜欢你简单的解决方案，我想指出你也可以消除两个 NSStrings 之间的空间：
NSString * myString = @"Hello"@"World";
