NSString *str = [[NSString alloc] initWithUTF8String: "123456"]; [str release];
或者
//不用释放内存 NSString *str = [NSString stringWithFormat:@"i has %i and %.2f", 19, 1.223f];
initWithUTF8String -> stringWithUTF8String
initWithFormat -> stringWithFormat
NSString *str = [[NSString alloc] initWithUTF8String: "123456"]; [str release];
//不用释放内存 NSString *str = [NSString stringWithFormat:@"i has %i and %.2f", 19, 1.223f];