iOS 按時(shí)間的近期優(yōu)先

NSSortDescriptor *sorter = [[NSSortDescriptor alloc] initWithKey:@"time"ascending:YES];

NSMutableArray *sortDescriptors = [[NSMutableArray alloc] initWithObjects:&sorter count:1];

NSArray *sortArray = [_dataArray sortedArrayUsingDescriptors:sortDescriptors];