一些封装好的代码方法块160327

代码段一：

- (NSString*)repalaceStringBeforStr:(NSString*)beforStr useReplaceStr:(NSString*)maskStr withPosition:(NSRange)range{
    NSInteger location = range.location;
    NSInteger length = range.length;
    NSString *firstStr = [beforStr substringToIndex:location];
    NSString *lastStr = [beforStr substringFromIndex:length];
    NSString *middleStr = @"";
    for (int i = 0; i < beforStr.length - (length - location); i++) {
        middleStr = [middleStr stringByAppendingString:maskStr];
    }
    NSString *finalStr =[[firstStr stringByAppendingString:middleStr] stringByAppendingString:lastStr];
    return finalStr;
}

以上代码方法的使用：

    NSString * str = @"6666666666666666";

    NSInteger starLocation = 4;//开始位置

    NSInteger length = str.length - starLocation;//替换长度

    NSRange range =NSMakeRange(starLocation, length);

    NSString * newStr = [self repalaceStringBeforStr:str useReplaceStr:@"*" withPosition:range];

打印结果为： newStr = 6666********6666

使用注意事项：range 里面的数据范围不能超出字符串的范围了。

 

 代码段二

- (NSString*)repalaceStringBeforStr:(NSString*)beforStr useReplaceStr:(NSString*)maskStr atIndex:(NSInteger)index{
    //index 是字符串的倒数下标位置
    NSInteger length = beforStr.length;
    NSInteger subLength = length-index;
    NSString *lastStr = [beforStr substringFromIndex:subLength];
    NSString *middleStr = @"";
    for (int i = 0; i < subLength; i++) {
        middleStr = [middleStr stringByAppendingString:maskStr];
        if (3 == i%4) {
            middleStr = [middleStr stringByAppendingString:@" "];
        }
    }
    NSString *finalStr =[middleStr stringByAppendingString:lastStr];
    return finalStr;
}

    NSString * str = @"6666666666666666";

    NSString * newStr = [self repalaceStringBeforStr:str useReplaceStr:@"*" atIndex:4];

打印结果为：newStr =   **** **** **** 6666

说明：最后一个参数是倒数的字符串下标

 

代码段三

//输入字符串为：@"20160304145824" 返回数组 [周几，日期,长时间格式,长时间格式(包括周几),月份,年月]
- (NSArray *)receDateArrWith:(NSString *)timeStr{
    
    //首先拆分与拼接(得到固定格式的时间:yyyy年MM月dd日 HH时mm分ss秒)
    NSString *yyStr = [[timeStr substringToIndex:4] stringByAppendingString:@"年"];
    NSString *mothStr = [[timeStr substringWithRange:NSMakeRange(4, 2)] stringByAppendingString:@"月"];
    NSString *ddStr = [[timeStr substringWithRange:NSMakeRange(6, 2)] stringByAppendingString:@"日"];
    ddStr = [ddStr stringByAppendingString:@" "];
    NSString *hhStr = [[timeStr substringWithRange:NSMakeRange(8, 2)] stringByAppendingString:@"点"];
    NSString *mmStr = [[timeStr substringWithRange:NSMakeRange(10, 2)] stringByAppendingString:@"分"];
    NSString *ssStr = [[timeStr substringFromIndex:timeStr.length-2] stringByAppendingString:@"秒"];
    NSString *resultTimeStr = [[[[[yyStr stringByAppendingString:mothStr] stringByAppendingString:ddStr] stringByAppendingString:hhStr] stringByAppendingString:mmStr] stringByAppendingString:ssStr];
    
    //进行时间格式的转化（得到NSDate对象:yyyy-MM-dd HH:mm:ss +0000）
    NSDateFormatter *setDateFormatter = [[NSDateFormatter alloc] init];
    [setDateFormatter setDateFormat:@"yyyy年MM月dd日 HH点mm分ss秒"];
    NSDate *dateFromString = [setDateFormatter dateFromString:resultTimeStr];
    
    //时间格式化
    [setDateFormatter setDateFormat:@"yyyy年MM月dd日 HH时mm分ss秒 EEE"];
    NSString *tempStr = [setDateFormatter stringFromDate:dateFromString];
    
    NSString *weekStr = [tempStr substringFromIndex:tempStr.length -3];
    NSString *dateStr = [tempStr substringWithRange:NSMakeRange(5, 6)];
    NSString *longTimeStr = [tempStr substringToIndex:tempStr.length -3];//去掉了星期几
    NSString *monthStr = [tempStr substringWithRange:NSMakeRange(5, 3)];
    NSString *yeaMthStr = [tempStr substringWithRange:NSMakeRange(0, 8)];
    
    if ([weekStr isEqualToString:@"Sun"]) {
        weekStr = @"周日";
    }else if ([weekStr isEqualToString:@"Sat"]){
        weekStr = @"周六";
    }else if ([weekStr isEqualToString:@"Mon"]){
        weekStr = @"周一";
    }else if ([weekStr isEqualToString:@"Tue"]){
        weekStr = @"周二";
    }else if ([weekStr isEqualToString:@"Wed"]){
        weekStr = @"周三";
    }else if ([weekStr isEqualToString:@"Thu"]){
        weekStr = @"周四";
    }else if ([weekStr isEqualToString:@"Fri"]){
        weekStr = @"周五";
    }
    
    NSString *llTimeStr = [longTimeStr stringByAppendingString:weekStr];
    
    NSArray *timeAry = @[weekStr,dateStr,longTimeStr,llTimeStr,monthStr,yeaMthStr];
    //做了一个安全的判断
    if (timeAry != nil) {
        return @[weekStr,dateStr,longTimeStr,llTimeStr,monthStr,yeaMthStr];
    }else{
        return nil;
    }
}

    NSString *timeStr = @"20160311145824";

    NSArray *timeAry = [self receDateArrWith:timeStr];

    NSLog(@"获取的时间数组为 %@",timeAry);

 打印结果为：

获取的时间数组为 [

周五,

03月11日,

2016年03月11日 14时58分24秒 ,

2016年03月11日 14时58分24秒周五,

03月,

2016年03月

]