ios - 如何对从服务器获取的数据进行排序

Question

我从 api 获取一些数据。我必须对日期进行排序。让我在一个数组中给出示例，其中 10 个字典，其中我有一个名为开始时间的参数。我必须显示迟到的事件首先流向下一个即将发生的事件，就像今天一样首先是事件，然后是明天的事件。

我经历了很多我无法理解的例子，有人可以帮助我。

这是来自 api 的结果。

(
        {
        bookingTime = "<null>";
        clubAddress = "Grand by GRT Hotels, Lobby Level, Sir Thyagaraya Road, Thyagaraya Nagar , Chennai";
        clubCity = "Chennai,India";
        clubFacilities = "<null>";
        clubInfoID = 270;
        clubLatitude = "13.0402612";
        clubLoc = Chennai;
        clubLongitude = "80.2423";
        clubMobileNumber = "<null>";
        clubName = "The Code-Grand by GRT Hotels";
        clubType = "Night club";
        clubberMobile = "<null>";
        clubberName = "<null>";
        count = 0;
        coupleCover = 0;
        coupleEntry = 0;
        couplePayment = "<null>";
        description = "<null>";
        distance = 0;
        djId = "<null>";
        dressCode = "<null>";
        endDate = "2017-07-03 18:00:00";
        entryCancellationTime = "<null>";
        eventOffer = "<null>";
        eventType = DANCE;
        favoriteType = NO;
        festivalList = "<null>";
        "idclub_event" = 6042;
        moodDJ = "<null>";
        moodMusic = "Salsa, Bachata, Kizomba";
        moodTheme = "LATIN CODE NIGHT";
        offerCredits = 0;
        paidStatus = NOTPAID;
        personAllowed = 0;
        pictureType = IMAGE;
        rateAmbience = 0;
        rateAvg = 0;
        rateFood = 0;
        rateMusic = 0;
        rateService = 0;
        rsvpEntryTime = "<null>";
        rsvpRequestTime = "<null>";
        rsvpStatus = NO;
        rsvpType = BOTH;
        stagCover = 0;
        stagEntry = 0;
        stagPayment = "<null>";
        startDate = "2017-07-03 15:30:00";
        stopEdit = "<null>";
    },
        {
        bookingTime = "<null>";
        clubAddress = "309 Rajiv Gandhi Salai (OMR), Sholinganallur, Chennai, Tamil Nadu 600119";
        clubCity = "Chennai,India";
        clubFacilities = "<null>";
        clubInfoID = 276;
        clubLatitude = "12.9056392";
        clubLoc = Sholinganallur;
        clubLongitude = "80.2256728";
        clubMobileNumber = "<null>";
        clubName = "The Gateway Hotel";
        clubType = Pub;
        clubberMobile = "<null>";
        clubberName = "<null>";
        count = 0;
        coupleCover = 0;
        coupleEntry = 0;
        couplePayment = "<null>";
        description = "<null>";
        distance = 0;
        djId = "<null>";
        dressCode = "<null>";
        endDate = "2017-09-23 16:00:00";
        entryCancellationTime = "<null>";
        eventOffer = "<null>";
        eventType = DANCE;
        favoriteType = NO;
        festivalList = "<null>";
        "idclub_event" = 5945;
        moodDJ = "<null>";
        moodMusic = "Bachata ";
        moodTheme = "Toke D Keda: Bachata Concert";
        offerCredits = 0;
        paidStatus = NOTPAID;
        personAllowed = 0;
        pictureType = IMAGE;
        rateAmbience = 0;
        rateAvg = 0;
        rateFood = 0;
        rateMusic = 0;
        rateService = 0;
        rsvpEntryTime = "<null>";
        rsvpRequestTime = "<null>";
        rsvpStatus = NO;
        rsvpType = BOTH;
        stagCover = 0;
        stagEntry = 0;
        stagPayment = "<null>";
        startDate = "2017-09-23 10:00:00";
        stopEdit = "<null>";
    },

请帮我解决这个问题，谢谢快速回复。

Answer 1

解析 API 响应并将事件详细信息存储在模型类中。最后你会得到 Events

数组

然后使用NSSortDescriptor对数组进行排序

//startDate key is the variable name of your `Event` model. Where you stored the event dates
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"startDate" ascending:YES];

// ascending YES/NO based on your needs

NSArray *sortedEventsList = [arrayOfEvents sortedArrayUsingDescriptors:[NSArray arrayWithObject:sortDescriptor]];

按日期对字典排序

NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; 
[formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; 

NSMutableArray *dateArray = [[NSMutableArray alloc] init]; 
for (int i=0; i<list.count; i++) { 
NSMutableDictionary *dict = [list[i] mutableCopy]; 
NSString *datestr=dict[@"startDate"]; 
NSDate *date = [formatter dateFromString:datestr]; 

dict[@"startDate"] = date; 
dateArray[i] = dict; 
} 
NSLog(@"%@",dateArray); 
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"startDate" ascending:YES];