Question

我正在寻找一些代码，可以让我的uipicker像这样填充我们在这里讨论两个组成部分。第一个组件需要DAY和DATE 我可以处理的第二个组件。

|星期三20日|下午2点|
|星期四21日下午1点
|等...

我可以处理第二个组件，我只是找不到任何示例代码来格式化第一个组件。我知道我需要首先确定今天的DAY，然后DATE ..然后从那里构建，但希望有人可能有一些类似于此的示例代码。任何帮助将不胜感激。

Answer 1

因为没有找到任何其他方式或更好的方法来做到这一点。我把它放在一起。它正在创建一个格式化的日期数组，就像我想要的那样。它不漂亮，但我找不到更好的方法。你会认为FOR循环可以更容易地设置格式化日期的最后2个字符，但事实证明它有它的怪癖，我不想花一个小时试图纠正它，所以我采取了简单的丑陋方式。< / p>

下面的代码生成了Day＆amp;的格式化数组。这样的日期：
星期三5日星期四6日星期五7日等等...
从今天的日期和日期开始。

- (void)createDatesForPicker {


    daysForPicker = [[NSMutableArray alloc] initWithCapacity:0];
    formatedDaysForPicker = [[NSMutableArray alloc] initWithCapacity:0];

    //get todays Day & Date
    NSDate *today1 = [NSDate date];
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"EEEE dd"];

    //change how many days out you want to go here I am going 14 days out
    for (int i=0; i<14; i++){

        NSCalendar *gregorian11 = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];  

        NSDateComponents *components1 = [gregorian11 components:NSWeekdayCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:today1];
        [components1 setDay:([components1 day]+i)];

        NSDate *beginningOfWeek1 = [gregorian11 dateFromComponents:components1];
        NSDateFormatter *dateFormat_weekend = [[NSDateFormatter alloc] init];
        [dateFormat_weekend setDateFormat:@"EEEE dd"];
        NSString *dateString_first = [dateFormat_weekend stringFromDate:beginningOfWeek1];

        // unformatted dates array
        [daysForPicker addObject:dateString_first];

    }

    // now we have all the days and date, so lets format them so they look good 
    for (int i=0; i<[daysForPicker count];i++) {
        NSString * currentDay = [NSString stringWithFormat:@"%@",[daysForPicker objectAtIndex:i]];

        //we have date now look at 2nd to last digit and check if it is a zero, if so remove it.
        NSUInteger count = [currentDay length]-1;
        NSRange r = NSMakeRange( count,1 );
        NSString * lastChar = [currentDay substringWithRange:r];



        if ([lastChar isEqual:@"0"] == TRUE ) {
            //replace it with nothing
        }
        else {
            //not a zero at the end so we are good to remove all zeros
            currentDay = [currentDay stringByReplacingOccurrencesOfString:@"0" withString:@""]; 
        }

        //used later for date formatting
        NSUInteger count2 = [currentDay length]-2;
        NSRange r2 = NSMakeRange( count2,2 );
        NSString * dateDigits = [currentDay substringWithRange:r2];

        if ([dateDigits isEqual:@" 1"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"st"];
        }
        if ([dateDigits isEqual:@" 2"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"nd"];
        }
        if ([dateDigits isEqual:@" 3"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"rd"];
        }
        if ([dateDigits isEqual:@" 4"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@" 5"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@" 6"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@" 7"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@" 8"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@" 9"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"10"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"11"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"12"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"13"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"14"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"15"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"16"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"17"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"18"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"19"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"20"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"21"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"st"];
        }
        if ([dateDigits isEqual:@"22"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"nd"];
        }
        if ([dateDigits isEqual:@"23"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"rd"];
        }
        if ([dateDigits isEqual:@"24"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"25"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"26"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"27"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"28"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"29"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"30"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"th"];
        }
        if ([dateDigits isEqual:@"31"] == TRUE) {
            currentDay = [currentDay stringByAppendingString:@"st"];
        }


        // add formated string to array
        [formatedDaysForPicker addObject:currentDay];

    }



}

Answer 2

以下将为您提供日期名称和日期：

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"EEEE d"]; // name of the day and day number
dateString = [self.dateFormatter stringFromDate: aDate]; // Monday 20
[dateFormatter release];

如何使用当前星期+日期填充UIPicker，

2 个答案: