问题描述

OC中删除字符串中相邻的重复字符

//去除字符串内的相邻的重复字符，例如：aabdaaadesff，最后结果abdadesf

    NSMutableString *string = [NSMutableString stringWithFormat:@"aabbssddffiieeoo"];

    NSString *strIndex1 = @"";
    NSString *strIndex2 = @"";

    for (NSInteger i = 0; i <= [string length]; i++) {

        strIndex1 = [string substringWithRange:NSMakeRange(i, 1)];

        strIndex2 = [string substringWithRange:NSMakeRange(i + 1, 1)];

        if ([strIndex1 isEqualTo:strIndex2]) {

            [string deleteCharactersInRange:NSMakeRange(i + 1, 1)];

        }

    }

    NSLog(@"%@", string);
            }

运行出来有错误 希望大神帮看看

解决方案

NSMutableString *string = [NSMutableString stringWithFormat:@"aabbbssddffffiieeoo"];

for (NSInteger i = 0; i < string.length - 1; i++) {
    for (NSInteger j = i+1; j < string.length; j++) {
        NSString *str1 = [string substringWithRange:NSMakeRange(i, 1)];
        NSString *str2 = [string substringWithRange:NSMakeRange(j, 1)];
        if ([str1 isEqualToString:str2]) {
            [string deleteCharactersInRange:NSMakeRange(j, 1)];
            j--;
        } else {
            break;
        }
    }
}

解决方案二：

NSString *currentStr=[[NSString alloc]init];
NSString *nextStr=[[NSString alloc]init];
NSString *string = @"abbssddffiieeoi";
NSMutableString *str=[[NSMutableString alloc]init];
int j=1;
for(int i=0;i<string.length;i++){

    if(i==string.length-1){
        currentStr=[string substringWithRange:NSMakeRange(string.length-1, 1)];
        [str appendString:currentStr];
        break;
    }else{
        currentStr=[string substringWithRange:NSMakeRange(i, 1)];
        nextStr=[string substringWithRange:NSMakeRange(j, 1)];
    if([currentStr isEqualToString:nextStr]){
        j++;

    }else{
        [str appendString:currentStr];
        j++;

    }
}
}
NSLog(@"%@",str);

解决方案三：

题主的错误是数组越界导致程序奔溃 把原题的等号去掉就 ok 了
reason: '-[__NSCFString substringWithRange:]: Range {8, 1} out of bounds; string length 8

问题很简单 题主要学会自己看错误报告 一般reason后面就是啦 翻译一下就知道了

解决方案四：

删除字符串中重复字符
删除字符串中重复字符
如何删除字符串中重复的字符

解决方案五：

SDFASDFASD

解决方案六：

删除字符串中相邻重复字符

NSMutableString *string = [NSMutableString stringWithFormat:@"ssddjjiirhwiofhjjdkkkd"];

    for (int i = 0; i < string.length; i++) {

        NSString *str1 = [string substringWithRange:NSMakeRange(i, 1)];

        NSString *str2 = [string substringWithRange:NSMakeRange(i - 1, 1)];

        if ([str1 isEqualToString:str2]) {

            [string deleteCharactersInRange:NSMakeRange(i, 1)];
        }

    }

    NSLog(@"%@", string);