cocoa - NSString stringWithUTF8String 附加错误

Question

我正在尝试将一个字符数组附加到一个NSString。当我使用下面的代码时，出现此错误:

********* initialization method -initWithCharactersNoCopy:length:freeWhenDone: cannot be sent to an abstract object of class NSCFString: Create a concrete instance!

这是什么意思以及如何解决？

NSString *str =  [[NSString new] initWithString:@"Name: "];
NSString *name = [[NSString new] stringWithUTF8String:user.name];
//NSString *name = [[NSString stringWithUTF8String:seg.segname] copy]; //this also failed
str = [str stringByAppendingString:name];

Answer 1

我认为您正在寻找这样的东西:

NSString *str = @"Name: ";
NSString *name = [NSString stringWithUTF8String:user.name];
str = [str stringByAppendingString:name];