[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);
 }