在Objective C中连接NSStrings

Question

如何在Objective C中连接到NSStrings？

Answer 1

如果字符串不可变，则需要：

NSString *firstString = @"FirstString";
NSString *secondString = @"SecondString";
NSString *concatinatedString = [firstString stringByAppendingString:secondString];
// Note that concatinatedString is autoreleased, 
// so if you may want to [concaticatedString retain] it.

为了完整性，这里是可变字符串的答案：

NSMutableString *firstString = [NSMutableString stringWithString:@"FirstString"];
NSString *secondString = @"SecondString";
[firstString appendString:secondString];
// Note that firstString is autoreleased, 
// so if you may want to [firstString retain] it.

Answer 2

如果你有一个可变的字符串，那么你可以这样做：

NSMutableString* someString = [NSMutableString stringWithString: @"Hello"];
[someString appendString: @", world!"];

例如。如果这不是您正在寻找的答案，请更具体。