The Step-by-Step Process of Adding a New Feature to My IOS App with Cursor

I vibe-coding to create web sites and IOS apps. I have already got two apps stay on the App Retailer.

My first app was Brush Tracker, which helps you observe your day by day brushing habits, keep constant, and hold your tooth clear by means of small motivational nudges. I additionally wrote an article on the complete technique of constructing the app and transport it to the App Retailer.

Lately, I made a decision so as to add a brand new function to Brush Tracker: a calendar-like grid that reveals the person’s month-to-month brushing consistency. On this article, I’ll stroll you thru how I applied this function utilizing Cursor and some guide changes I made.

Preliminary immediate

What I had in thoughts was much like the grids you see in habit-tracking apps or the contribution graph on GitHub.

I began with the Plan Mode of Cursor, which I’ve discovered extremely environment friendly when including a brand new function or making an enormous change. You outline the function or clarify the duty and Cursor generates an in depth implementation plan.

Right here is the precise immediate I used within the Plan Mode to get began:

I wish to add a calendar-like grid to trace days person full brushings. Make the grid with squares the place every sq. represents a day in a month. The preliminary state of the squares within the grid are black. Paint the sq. with inexperienced if the person completes all of the brushings, with mild inexperienced if the person partially full the brushings. For instance, person units the day by day brushings depend as 2. In the event that they full one brushing in a day, the sq. must be mild inexperienced. In the event that they full two brushings in day, the sq. for that day must be inexperienced. The grid must be accessible by urgent a calendar icon on the highest left of the display.

Cursor requested me two inquiries to make clear some particulars earlier than finalizing the implementation plan. I actually favored this step as a result of it’s reassuring to see Cursor search clarification as a substitute of creating assumptions by itself.

The 2 questions Cursor requested:

• Ought to the calendar grid present solely the present month, or permit navigation between months?
• Ought to we begin monitoring from as we speak ahead, or additionally present previous days (which might be black)?

I instructed Cursor to permit navigation between months and to show the earlier days of the month in black. Then, Cursor created a markdown file outlining an in depth implementation plan.

The plan explains intimately how the function will probably be applied and in addition features a listing of actionable todo objects.

Cursor’s TODO objects:

• Prolong BrushModel to trace historic day by day brushing knowledge with persistence

• Create CalendarGridView part with month grid and color-coded squares

• Add calendar icon button to prime left of ContentView

• Combine CalendarGridView with ContentView utilizing sheet presentation

Subsequent, I requested Cursor to implement the plan. It additionally permits for modifying the plan earlier than execution, however I wished to stay with Cursor’s authentic define as-is.

The implementation labored on the very first strive, and I used to be in a position to take a look at the function straight within the Xcode simulator. Nevertheless, the design was horrible:

Be aware: All pictures used on this article embody screenshots from my app, Brush Tracker.

Xcode simulator not consists of date and time settings, so I modified the system date on my Mac to check how the grid colours up to date throughout totally different days.

I didn’t like this model in any respect. So I requested Cursor to revamp the grid utilizing the next immediate:

We have to change the design of the grid. What I take into consideration is one thing like Github contributions grid. Additionally, don’t present the day values within the squares representing days.

This immediate didn’t work as I’d hoped. The one change it made was eradicating the day numbers:

Subsequent, I shared a pattern picture of the grid model I would like and requested Cursor to make an identical design.

The brand new design was nearer to what I had in thoughts nevertheless it had structural points. The squares have been too small and didn’t scale effectively throughout the format:

So there are two fundamental issues with this design:

1. Every month comprises 42 squares (not representing the times in any month).
2. Squares are too small.

I requested Cursor to repair the primary downside with this immediate:

Within the present implementation, there are 42 squares in November and December. Squares within the grid symbolize days in a month so the variety of squares should be equal to the variety of days in that month.

The opposite downside was easier and I might clear up it by adjusting some parameter values. As an example, the dimensions of the squares within the grid may be modified by the squareSize parameter:

struct DaySquare: View {
    let isToday: Bool
    let isCurrentMonth: Bool
    let brushCount: Int
    let brushesPerDay: Int
    
    non-public let squareSize: CGFloat = 8 // change this parameter

Right here is how the grid takes care of I modified the sq. measurement to 32:

The opposite downside that could possibly be solved by adjusting parameter values is the padding between rows.

Within the screenshot above, there appears to be no area between rows. This may be modified by growing padding between rows.

I additionally wish to have 8 squares (i.e. days) in a row and alter the area between rows.

All of those may be achieved within the following code snippet:

            // Calendar grid - smaller GitHub model
            LazyVGrid(columns: Array(repeating: GridItem(.versatile(), spacing: 0.2), depend: 8), spacing: 0) {
                ForEach(Array(calendarDays.enumerated()), id: .offset) { index, dayInfo in
                    DaySquare(
                        isToday: dayInfo.isToday,
                        isCurrentMonth: dayInfo.isCurrentMonth,
                        brushCount: dayInfo.brushCount,
                        brushesPerDay: mannequin.brushesPerDay,
                        measurement: 32
                    )
                    .padding(.backside, 3)
                }
            }

• spacing controls the area between squares in a row
• padding controls the area between rows
• depend controls the variety of squares in a row

After enjoying round with these parameter values within the code snippet above, I received the next grid:

If the person completes all brushings in a day, she will get a vibrant inexperienced. In case of partial completion, the sq. for that day is coloured with pale inexperienced. The opposite days are proven in black and the present day is indicated with a white body.

After implementing the function to maintain observe of previous days, it appeared pure so as to add notifications for streaks. I requested Cursor to do that utilizing the next immediate:

Add notifications for when the person accomplished all brushings for 10, 20, and 30 days. Additionally, add a month notification for when the person completes all days in a month. Notifications must be encouraging and motivating.

The grid I created will not be the very best design nevertheless it’s ok to ship the message. When a person appears to be like at this grid, she instantly will get an concept of her tooth brushing frequency.

With the assistance of Cursor and a few guide tweaks, I used to be in a position to implement and ship this function in a number of hours. On the time of writing this text, this model remains to be in App Retailer evaluate. By the point you learn the article, it could be distributed. Right here is the App Retailer hyperlink to Brush Tracker when you’d like to try it or check out the app.

Thanks for studying! When you have any suggestions in regards to the article or the app, I’d love to listen to your ideas.