iOS拼接字符串

NSString*
string; 

//
结果字符串

02

NSString*
string1, string2; 

//已存在的字符串，需要将string1和string2连接起来

03

04

//方法1.

05

string
= [NSString initWithFormat:@

"%@,%@"

,
string1, string2 ];

06

07

//方法2.

08

string
= [string1 stringByAppendingString:string2];

09

10

//方法3
.

11

string
= [string stringByAppendingFormat:@

"%@,%@"

,string1,
string2];