iOS大量數據按時間分組
有這樣一個需求，按月顯示賬單，每個月是一個組，組頭是顯示月份，列表顯示每筆交易數據，這個時候後端無法直接返回這種數據（難道每個月的數據剛好是一頁？），所以只能按分頁去請求對應那一頁的數據（數據帶上時間戳就行了），前端處理思路，循環遍歷本地所有數據（到加載當前頁和之前所有頁數據），按時間戳轉成年月，加到對應那條數據模型中去，並且用這個帶有年月的模型替換之前的數據模型，並且把這個年月放的一個set裏面，遍歷set 按set裏面的年月創建謂詞篩選器，把總數據用過濾方法得到新的數組,在添加的最終的數組sectionArary中
/*******************************************分組相關********************************************************/
- (void)sectionWithListForDate
{
[self.sectionArary removeAllObjects];
NSMutableSet *set=[NSMutableSet set];
NSInteger count = self.listData.data.count;
for (NSInteger i =0 ;i < count; i++) {
//時間
NSMutableDictionary * modelDic = self.listData.data[i];
NSString * timeStamp = STR_OBJ(modelDic[@"created_at"]);
NSDate * time = [NSDate dateWithTimestamp:timeStamp];
NSString * yearMonth = [NSString stringWithFormat:@"%ld-%02ld", [time yearIndex],[time monthIndex]] ;
modelDic[@"year_month"] = yearMonth;
[self
[set addObject:yearMonth];//利用set不重復的特性,得到有多少組,根據數組中的created_at字段
}
// NSMutableSet *set=[NSMutableSet set];
// [self.listData.data enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
// //時間
// NSDictionary * modelDic = obj;
// NSString * timeS = STR_OBJ(modelDic[@"created_at"]);
//
// [set addObject:timeS];//利用set不重復的特性,得到有多少組,根據數組中的created_at字段
// }];
[set enumerateObjectsUsingBlock:^(id obj, BOOL *stop) {//遍歷set數組
MLOG(@"obj=%@",obj);
NSString * yearMonth = obj;
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"year_month = %@", yearMonth];//創建謂詞篩選器
NSArray *groupList = [self.listData.data filteredArrayUsingPredicate:predicate];//用數組的過濾方法得到新的數組,在添加的最終的數組sectionArary中
NSMutableDictionary * mothDate = [NSMutableDictionary dictionary];
[mothDate setValue:groupList forKey:@"list"];
[mothDate setValue:yearMonth forKey:@"time"];
[self.sectionArary addObject:mothDate ];
NSInteger sectionIndex = [self.sectionArary indexOfObject:mothDate];
//按年月去請求對應月份的的相關信息及數據
[self requsetMonthInAndOut:yearMonth sectionIndex:sectionIndex];
}];
[self.sectionArary sortUsingComparator:^NSComparisonResult(id _Nonnull obj1, id _Nonnull obj2) {
NSString * time1 = obj1[@"time"];
NSDate * date1 = [NSDate ym_dateFromString:time1 format:@"yyyy-MM"];//[NSDate dateWithString:time1 format:@"yyyy年MM月"];
long long timeSp1 = [[NSNumber numberWithDouble:[date1 timeIntervalSince1970]] longLongValue];
NSString * time2 = obj2[@"time"];
NSDate * date2 = [NSDate ym_dateFromString:time2 format:@"yyyy-MM"];//[NSDate dateWithString:time2 format:@"yyyy年MM月"];
long long timeSp2 = [[NSNumber numberWithDouble:[date2 timeIntervalSince1970]] longLongValue];
return timeSp1 < timeSp2;
}];
}
- (void)requsetMonthInAndOut:(NSString*)yearMonth sectionIndex:(NSInteger)sectionIndex
{
// NSString * timeStr = [yearMonth stringByReplacingOccurrencesOfString:@"年" withString:@"-"];
// timeStr = [timeStr stringByReplacingOccurrencesOfString:@"月" withString:@""];
NSMutableDictionary * param = [NSMutableDictionary dictionary];
[param setObject:NON(self.shopIdStr) forKey:@"shop_id"];
[param setObject:NON(yearMonth) forKey:@"month"];
@weakify(self)
[self showHUD];
[[RequestClient sharedInstance] requestTransferRecordMonthInfo:param
success:^(NSURLSessionDataTask *operation, id responseObject) {
@strongify(self)
[self hideHUD];
NSMutableDictionary * monthData = self.sectionArary[sectionIndex];
monthData[@"in"] = responseObject[@"in"];
monthData[@"out"] = responseObject[@"out"];
[self.sectionArary replaceObjectAtIndex:sectionIndex withObject:monthData];
//刷新
[self.tableView reloadSections:[NSIndexSet indexSetWithIndex:sectionIndex] withRowAnimation:UITableViewRowAnimationNone];
[self endRefreshing];
_isFirstLoad = NO;
}
failure:^(NSURLSessionDataTask *operation, NSError *error) {
@strongify(self)
[self hideHUD];
[self showError:error];
[self endRefreshing];
_isFirstLoad = NO;
}];
}
iOS大量數據按時間分組