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  • OC中字符串的提取与替换-四种不同方法实现

    /*
     1.将可变字符串 @"When I was young, I loved a girl in neighbor class."中,从 young提取到girl。替换 成@"a teacher, I rather to teach student "。
     */
         
            /*方法一*/
            //NSMutableString * str = @"When I was young, I loved a girl in neighbor class.";
            /*
            NSMutableString * str1 = [[NSMutableString alloc]initWithString:@"When I was young, I loved a girl in neighbor class."];
            [str1 replaceCharactersInRange:NSMakeRange(11, 21) withString:@"a teacher, I rather to teach student"];
            NSLog(@"%@",str1);
            */
            
            /**方法二  先删除 再插入*/
            /*
            NSMutableString * str1 = [[NSMutableString alloc]initWithString:@"When I was young, I loved a girl in neighbor class."];
            [str1 deleteCharactersInRange:NSMakeRange(11,22)];
            //NSLog(@"%@",str1);
            [str1 insertString:@"a teacher, I rather to teach student" atIndex:11];
            NSLog(@"%@",str1);
            */
            
            /*方法三*/
            /*
            NSMutableString * str1 = [[NSMutableString alloc]initWithString:@"When I was young, I loved a girl in neighbor class."];
            NSString * str2 = [str1 stringByReplacingOccurrencesOfString:@"young, I loved a girl" withString:@"a teacher, I rather to teach student"];
            NSLog(@"%@",str2);
            */
            
            /*方法四*/
            NSMutableString * str1 = [[NSMutableString alloc]initWithString:@"When I was young, I loved a girl in neighbor class."];
             NSMutableString * str2=[str1 stringByReplacingOccurrencesOfString:@"young, I loved a girl" withString:@""];
            [str2 insertString:@"a teacher, I rather to teach student" atIndex:11];
            NSLog(@"%@",str2);
    
    
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  • 原文地址:https://www.cnblogs.com/zhangyang17/p/4866256.html
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