[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

 

 #pragma mark buffer string create

 void stringCreate()

 {

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

     [mutStr setString:@"Go!"];

     NSLog(@"%@", mutStr);

     [mutStr appendString:@"Hello"];

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

     NSLog(@"%@", mutStr);

     //Replace string

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

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

     NSLog(@"%@", mutStr);

     //Insert string

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

     NSLog(@"%@", mutStr);

     //Delete string

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

     [mutStr deleteCharactersInRange: r2];

     NSLog(@"%@", mutStr);

 }