Question

I am making a day view calendar just like the native iPhone calendar. I am trying to position the tiles the same as in the native calendar, side by side, if they are the same size and same time.

However, I can only figure out how to do it to 2 tiles and not multiple tiles. In the attached image I have 4 tiles. One that expands slightly into the other 3. I then have the first tile on the far left and the second tile just after the first one. Now I need to figure out how to add the additional tiles?

How would I do this for more than 2 tiles?

About the image: If you can’t see it the 3rd tile is ontop of the 2nd tile (you can see it is a bit darker since they are on top of each other.

- (void)layoutSubviews
{
    // Set the main
    for (UIView *view in self.subviews) {
        APCalendarDayTile *tile = (APCalendarDayTile *)view;
        CGFloat startPos = [APCalendarCurrentDayView yAxisForTime:[APCalendarCurrentDayView minutesToTime:tile.appointment.startDate]];
        CGFloat endPos = [APCalendarCurrentDayView yAxisForTime:[APCalendarCurrentDayView minutesToTime:tile.appointment.endDate]];
        tile.frame = CGRectMake(kLeftSideBuffer, startPos, (self.bounds.size.width - kLeftSideBuffer) , endPos - startPos);
        tile.backgroundColor = [UIColor colorWithHexString:tile.appointment.appointmentColor];
    }

    for (UIView *view in self.subviews) {
        APCalendarDayTile *tile = (APCalendarDayTile *)view;

        if ([self viewIntersectsWithAnotherView:tile]) {

        }
    }
}

- (BOOL)viewIntersectsWithAnotherView:(UIView*)selectedView{
    NSArray *subViewsInView=[self subviews];// I assume self is a subclass
    // of UIViewController but the view can be
    //any UIView that'd act as a container 
    //for all other views.
    for (UIView *theView in subViewsInView){
        if (![selectedView isEqual:theView]) {
            if(CGRectIntersectsRect(selectedView.frame, theView.frame)) {
                if ((selectedView.frame.origin.y == theView.frame.origin.y) && (selectedView.frame.size.height == theView.frame.size.height)) {
                    if (theView.frame.size.width == self.bounds.size.width - kLeftSideBuffer) {
                        theView.frame = CGRectMake(theView.frame.origin.x, selectedView.frame.origin.y, theView.frame.size.width / 2, selectedView.frame.size.height);
                    }
                    selectedView.frame = CGRectMake(theView.frame.origin.x + theView.frame.size.width, selectedView.frame.origin.y, theView.frame.size.width, selectedView.frame.size.height);
                    return YES;
                }
            }
        }
    }
    return NO;
}

Answer 1

Ok,

I sorta took SaltyMule’s approach however, his pseudo code didn’t make sense in the if / else.

- (void)layoutSubviews
{
    // Set the main
    for (UIView *view in self.subviews) {
        APCalendarDayTile *tile = (APCalendarDayTile *)view;
        CGFloat startPos = [APCalendarCurrentDayView yAxisForTime:[APCalendarCurrentDayView minutesToTime:tile.appointment.startDate]];
        CGFloat endPos = [APCalendarCurrentDayView yAxisForTime:[APCalendarCurrentDayView minutesToTime:tile.appointment.endDate]];
        tile.frame = CGRectMake(kLeftSideBuffer, startPos, (self.bounds.size.width - kLeftSideBuffer) , endPos - startPos);
        tile.backgroundColor = [UIColor colorWithHexString:tile.appointment.appointmentColor];
    }

    [sameTimeAppointments removeAllObjects];

    for (UIView *view in self.subviews) {
        APCalendarDayTile *tile = (APCalendarDayTile *)view;

        if ([self viewIntersectsWithAnotherView:tile]) {
            if ([sameTimeAppointments objectForKey:[NSString stringWithFormat:@"%f", tile.frame.origin.y]] != nil) {
                NSMutableArray *tempArray = [[sameTimeAppointments objectForKey:[NSString stringWithFormat:@"%f", tile.frame.origin.y]] mutableCopy];
                [tempArray addObject:tile];
                [sameTimeAppointments setValue:tempArray forKey:[NSString stringWithFormat:@"%f", tile.frame.origin.y]];
            } else {
                [sameTimeAppointments setValue:[NSMutableArray arrayWithObject:tile] forKey:[NSString stringWithFormat:@"%f", tile.frame.origin.y]];
            }
        }
    }
    for (NSString *currentDict in sameTimeAppointments) {
        NSArray *currentAppointments = [sameTimeAppointments objectForKey:currentDict];
        float tileWidth = ((self.frame.size.width - kLeftSideBuffer) / [currentAppointments count]);
        for (int i = 0; i < [currentAppointments count]; i++) {
            APCalendarDayTile *tile = [currentAppointments objectAtIndex:i];
            float xPos = 0.0 + kLeftSideBuffer;
            if (i != 0) {
                xPos = (((APCalendarDayTile *)[currentAppointments objectAtIndex:i - 1]).frame.origin.x + tileWidth);
            }

            tile.frame = CGRectMake(xPos, tile.frame.origin.y, tileWidth, tile.frame.size.height);
            [self bringSubviewToFront:tile];
        }
    }
}

- (BOOL)viewIntersectsWithAnotherView:(UIView*)selectedView{
    NSArray *subViewsInView=[self subviews];// I assume self is a subclass
    // of UIViewController but the view can be
    //any UIView that'd act as a container 
    //for all other views.
    for (UIView *theView in subViewsInView){
        if (![selectedView isEqual:theView]) {
            if(CGRectIntersectsRect(selectedView.frame, theView.frame)) {
                if ((selectedView.frame.origin.y == theView.frame.origin.y) && (selectedView.frame.size.height == theView.frame.size.height)) {
                    return YES;
                }
            }
        }
    }
    return NO;
}