将版本号字符串 转换为整数字符串

versionStrtingToNumberString.m

+ (NSString *)versionStrtingToNumberString:(NSString*)versions {
    NSArray <NSString *>*arry=[versions componentsSeparatedByString:@"."];
    NSMutableArray * numberAry = [[NSMutableArray alloc] initWithCapacity:6];
//    for (NSString *i in arry){
//        NSLog(@"%@",i);
//    }
    for (NSInteger i =0; i <arry.count; i ++) {
        
        if(arry[i].length==1){
           
            if(i==2){
                [numberAry insertObject:@"0" atIndex:2*i];
                [numberAry insertObject:arry[i] atIndex:2*i+1];
            }else{
                [numberAry insertObject:arry[i] atIndex:2*i];
                [numberAry insertObject:@"0" atIndex:2*i+1];
            }
        }else if(arry[i].length==2){
            if(i==2){
                NSMutableArray *letterArray = [NSMutableArray array];
                 
                [arry[i] enumerateSubstringsInRange:NSMakeRange(0, [arry[i]  length])
                                            options:(NSStringEnumerationByComposedCharacterSequences)
                                         usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
                    [letterArray addObject:substring];
                }];
                
                [numberAry insertObject:letterArray[1] atIndex:2*i];
                [numberAry insertObject:letterArray[0] atIndex:2*i+1];
            }else{
                NSMutableArray *letterArray = [NSMutableArray array];
                 
                [arry[i] enumerateSubstringsInRange:NSMakeRange(0, [arry[i]  length])
                                            options:(NSStringEnumerationByComposedCharacterSequences)
                                         usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
                    [letterArray addObject:substring];
                }];
                
                [numberAry insertObject:letterArray[0] atIndex:2*i];
                [numberAry insertObject:letterArray[1] atIndex:2*i+1];
            }
            
        }
    }
//    NSLog(@"------------------");
//    for (NSString *i in numberAry){
//        NSLog(@"%@",i);
//    }
    NSMutableString * result = [[NSMutableString alloc] init];
    for (NSObject * obj in numberAry)
    {
        [result appendString:[obj description]];
    }
    NSLog(@"%@",result);
    return  result;
}