[OC Foundation框架 - 6] NSMutableString

NSString是不可变的

NSMutableString是可变字符串

 

1.初始化

2.串联字符串

3.替换字符串

4.插入字符串

5.删除字符串

 

 1 #pragma mark buffer string create

 2 void stringCreate()

 3 {

 4     NSMutableString *mutStr = [[NSMutableString alloc] initWithCapacity:10];

 5     [mutStr setString:@"Go!"];

 6     NSLog(@"%@", mutStr);

 7     [mutStr appendString:@"Hello"];

 8     [mutStr appendFormat:@",age is %i and height is %.2f", 12, 1.54];

 9     NSLog(@"%@", mutStr);

10    

11     //Replace string

12     NSRange r = [mutStr rangeOfString:@"age"];

13     [mutStr replaceCharactersInRange:r withString:@"number"];

14     NSLog(@"%@", mutStr);

15    

16     //Insert string

17     [mutStr insertString:@"insert" atIndex:2];

18     NSLog(@"%@", mutStr);

19    

20     //Delete string

21     NSRange r2 = [mutStr rangeOfString:@"height"];

22     [mutStr deleteCharactersInRange: r2];

23     NSLog(@"%@", mutStr);

24 }