WenchaoD

    NSDate *fromDate = ...;
    NSDate *toDate = ...;
    NSCalendar *gregorian = [NSCalendar calendarWithIdentifier:NSCalendarIdentifierGregorian];
    NSInteger daysDiff = [gregorian components:NSCalendarUnitDay fromDate:fromDate toDate:toDate options:0].day;
    NSMutableArray<NSDate *> *array = [NSMutableArray arrayWithObject:fromDate];
    for (int i = 1; i <= daysDiff; i++) {
        NSDate *date = [gregorian dateByAddingUnit:NSCalendarUnitDay value:daysDiff toDate:toDate options:0];
        if (date) [array addObject:date];
    }
    NSArray<NSDate *> *dates = array.copy;

WenchaoD

    NSDictionary *launchImageNames = @{
                                       @"320x480" : @"LaunchImage-700@2x.png",
                                       @"320x568" : @"LaunchImage-700-568h@2x.png",
                                       @"375x667" : @"LaunchImage-800-667h@2x.png",
                                       @"414x736" : @"LaunchImage-800-Portrait-736h@3x.png"
                                      };
    NSString *aspect = [NSString stringWithFormat:@"%@x%@",@([UIScreen mainScreen].bounds.size.width),@([UIScreen mainScreen].bounds.size.height)];
    UIImage *launchImage = [UIImage imageNamed:launchImageNames[aspect]];

WenchaoD

[[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithObjects:@"de", @"en", @"fr", nil] forKey:@"AppleLanguages"];
[[NSUserDefaults standardUserDefaults] synchronize]; //to make the change immediate

WenchaoD

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