iOS学习路之Objective-C（三）—— NSMutableString

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1. NSMutableString可变字符串的创建

   1     NSMutableString *string1 = [[NSMutableString alloc] init];
   2     //string2对象方法由创建，string3由类方法创建
   3     NSMutableString *string2 = [[NSMutableString alloc] initWithCapacity:0];
   4     NSMutableString *string3 = [NSMutableString stringWithCapacity:0];

    

2. 字符串的添加

   1     NSMutableString *string = [[NSMutableString alloc] init];
   2     //- (void)appendString:(NSString *)aString;
   3     //作用：在字符串后添加，不用创建新的字符串
   4     [string appendString:@"bei jing ying nin"];
   5     NSLog(@"%@", string);
   6     //- (void)insertString:(NSString *)aString atIndex:(NSUInteger)loc;
   7     //作用：在字符串某位置插入字符串
   8     [string insertString:@"huan" atIndex:8];
   9     NSLog(@"%@", string);

    

3. 字符串的删除

       NSMutableString *string = [[NSMutableString alloc] init];
       [string appendString:@"bei jing huan ying nin"];
       NSLog(@"%@", string);
       //- (void)deleteCharactersInRange:(NSRange)range;
       //作用：字符串的删除
       NSRange range = {1, 5};
       [string deleteCharactersInRange:range];
       NSLog(@"%@", string);

    

iOS学习路之Objective-C（三）—— NSMutableString

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原文地址：http://www.cnblogs.com/dyikai/p/4495350.html