iOS Chart – Developer Challenges

Eager Wolf Apr 27, 2019 at 11:24

Sloppy when scrolling the first two graphs vertically after zooming them out. Random crashes. Delay on day/night mode change. Overall speed is slightly above average+

iPhone 6 Plus, iOS 12.1

50

Magic Otter Apr 28, 2019 at 07:01

Thank you!
I take this opportunity to show link to my Telegram account if someone want to text me:
t.me/mayor

Jolly Croc Apr 17, 2019 at 14:09

Percents add up to 102, not 100

iPhone SE / iOS 12

21

Magic Otter Apr 17, 2019 at 14:18

That’s because of rounding numbers. If you prefer to see 0.235% - you can think that it’s issue. Percents don’t need to be super correct, if you want super-correct information, you can look at numbers.

Mighty Whale Apr 17, 2019 at 18:02

CRITICAL: app doesn't support 4 inch displays (iPhone 5, 5C, 5S, SE, iPod). Grid, right y labels, x labels, selected dates label - all positioned wrong.

iPhone SE

20

Magic Otter Apr 18, 2019 at 06:12

Agree, right labels and title has a little bit wrong positions, but not on every 4 inch iPhone. Everything else is OK. You sure that it’s critical? It crashes?

Mighty Whale Apr 17, 2019 at 18:57

CRITICAL: Y scaled charts left y labels are broken. They sometimes show values for one graph, sometimes for another.

0:13

iPhone SE

20

Magic Otter Apr 18, 2019 at 05:51

Agree. That’s small bug. You sure that it’s critical?

Classy Unicorn Apr 17, 2019 at 21:13

Same Y axis scaling direction for upscale and downscale and strange chart horizontal shaking while scaling

0:13

iPhone 6s / iOS 12.2

20

Magic Otter Apr 20, 2019 at 22:49

That’s because you are using old phone. It helps old phones don’t lagging when, and that’s only if you change range to slow

Tidy Lynx Apr 22, 2019 at 19:41

Strange vertical line on popup. It should be moved in one direction only.

0:13

iPhone 6 Plus, iOS 11.2

10

Subtle Phoenix Apr 17, 2019 at 15:11

Enjoy algorithms https://en.wikipedia.org/wiki/Largest_remainder_method

1

Magic Otter Apr 17, 2019 at 15:23

You sure that your message is issue?

Mighty Whale Apr 17, 2019 at 18:36

X labels are not fully shown or hidden. Their opacity depends on their position. Stage 1 video showed that labels should have only two final states - shown or hidden, no intermediate.

They also don't move smoothly.

0:15

iPhone SE

1

Magic Otter Apr 18, 2019 at 05:39

Stage 1 video don’t show that labels should have only two final states. Also, Telegram admins didn’t report me this as an issue in Stage 1 results.

Mighty Whale Apr 17, 2019 at 18:40

Can't select value by tap.

0:04

iPhone SE

1

Magic Otter Apr 18, 2019 at 05:40

That’s not an issue, to select value you should do long touch.

Mighty Whale Apr 17, 2019 at 18:49

Y axis range values doesn't even try to be "nice".

iPhone SE

1

Magic Otter Apr 18, 2019 at 05:41

Really? It’s not an issue to “round” or not round numbers. We don’t have enough information how it should be.

Classy Unicorn Apr 17, 2019 at 20:47

Wrong slider design: 1. too massive knob 2. wrong overlay color/transparency in day and night mode 3. preview chart line is too thick; Overall wrong sizes: X and Y axes text size and color, date format and size (see more on screenshot)

iPhone 6s / iOS 12.2

1

Magic Otter Apr 18, 2019 at 05:46

Where do you found information about positions and sizes? I can’t find it in contest’s channel, so we don’t need to make super-similar design.

Classy Unicorn Apr 17, 2019 at 22:25

Wrong stacked bar chart and percentage chart areas order. "Apples" (blue) should be at the bottom

iPhone 6s / iOS 12.2

1

Magic Otter Apr 18, 2019 at 06:09

You sure that it’s an issue? How this will interfere user? Also, we don’t have enough information how it should be. In Telegram designers screenshot it looks like in bottom should be largest data. But, in data provided by Telegram “Mango” has more number than “Kiwi”.

Perfect Sheep Apr 18, 2019 at 18:36

The app crashes, probably OOM

0:22

iphone 6 12.1.4

1

Magic Otter Apr 18, 2019 at 19:15

Can't reproduce.

Grim Piranha Apr 19, 2019 at 08:32

the app has its own personal life after many taps on the night mode button

0:23

iphone 5s; v.10.2

1

Magic Otter Apr 19, 2019 at 09:40

i think that’s your phone. Can’t reproduce.

Tidy Lynx Apr 22, 2019 at 19:31

Crashes on iPhone 5

0:04

iPhone 5, iOS 10.3

1

Tidy Lynx Apr 22, 2019 at 19:38

Randomly crashes

1

Magic Otter Apr 24, 2019 at 10:04

Video please.

Jolly Croc Apr 17, 2019 at 14:04

Not able to start scrolling table when scroll starts in range selector cell

iPhone SE / iOS 12

Magic Otter Apr 17, 2019 at 14:14

Why do you think that it’s an issue? That’s a feature. Scroll is disabled on range changing. Do you need scroll charts when you selecting range? It just will interfere you.

Mighty Whale Apr 17, 2019 at 18:08

Axis labels and lines (both x and y) are totally wrong. On screenshot selected red value is 1520, but dot is lower than 1480 grid line. Also date is 31 may, but it is between Jun 5 and Jul 4.

On second screenshot you can see that value 1520 is lower than 1480 grid line even when not selected.

iPhone SE

Magic Otter Apr 18, 2019 at 06:14

Line at 1480, value at 1520. Totally wrong. I think, you should mark this as critical issue.

Mighty Whale Apr 17, 2019 at 18:12

Selected info view hides selected value dots and don't move right or left to show them as in Stage 2 iOS_2_Night.png (and other) picture.

iPhone SE

Magic Otter Apr 18, 2019 at 06:16

Telegram provide screenshot, where inform view in first not zoomed chart located at center of selected value.

Mighty Whale Apr 17, 2019 at 18:59

Animation for y labels is wrong. They should be animated from their old positions in current context to their new ones (so if they are lower they go from down, if they are bigger they go from up). Here they go randomly, in attached video always from up.

0:08

iPhone SE

Magic Otter Apr 18, 2019 at 05:50

I don’t know how you made this video. I have everything OK

MP4

iPhone 8 / iOS 12

Classy Unicorn Apr 17, 2019 at 21:23

Y axis don't react on chart scaling when applying a filter

0:09

iPhone 6s / iOS 12.2

Magic Otter Apr 18, 2019 at 08:13

Agree. That’s because min value in range you selected changed for a little. In another cases it’s animating.

MP4

Classy Unicorn Apr 17, 2019 at 21:44

Crash at start

0:10

iPhone 5 / iOS 10.3.3

Classy Unicorn Apr 17, 2019 at 21:51

Double Y axis chart scaling don't affects right Y axis scale

0:13

iPhone 6s / iOS 12.2

Magic Otter Apr 18, 2019 at 05:56

Please read issues history before adding new issue.

Classy Unicorn Apr 17, 2019 at 21:58

Y axis values don't match details view (huge difference) for selected point: 345K on details - 15-16K on axis, 15K on details - 13-14K on axis. Also circles sizes are too big, not by design.

iPhone 6s / iOS 12.2

Magic Otter Apr 18, 2019 at 05:57

Please read issues history before adding new issue.

Classy Unicorn Apr 17, 2019 at 22:13

1. Slider moves even when you pan outside it. It also blocks a vertical scroll.
2. Chart isn't clipped to its bounds. You can see it in bottom-left and top-right corners by fast scrolling

0:09

iPhone 6s / iOS 12.2

Magic Otter Apr 18, 2019 at 06:03

1. It’s not a bug, it’s feature which can help you to move slider when you put your finger in wrong place. Vertical blog is blocked so as not to interfere you. Come on

2. Why do you think that chart should be clipped to bottom bounds? We don’t have information how it should be. But we have information, that chart is don’t need to be clipped to bounds (left and right), so maybe and bottom and top.

Sergey Dikovitsky Apr 18, 2019 at 11:22

X-axis values wiggle during range changes.

0:10

iPhone 5s / iOS 12.2

Magic Otter Apr 18, 2019 at 12:42

That issue with labels in second chart was reported above.

Sergey Dikovitsky Apr 18, 2019 at 11:24

View with values can be cut.

iPhone 5s / iOS 12.2

Magic Otter Apr 18, 2019 at 12:51

That’s by design. Information view should be left or right of selection line. There’s no way not to cut it on small screen. If i’d make small text size it would be really hard to read.

Tidy Lynx Apr 22, 2019 at 19:30

Does not support iOS 8. Telegram does.

Magic Otter Apr 24, 2019 at 10:07

we don’t have information what versions we should support

Tidy Lynx Apr 22, 2019 at 19:39

Critical issue: Chart and dates are animated on certain positions only. Not only the UX is suffering, but also it gives this contestant a HUGE advantage in performance over other participants.

0:12

iPhone 5S, iOS 12.2

Magic Otter Apr 24, 2019 at 09:55

It’s not an issue. You have a really old phone, it helps him don’t lagging. In >=iPhone 8 phones there’s no such optimization.

Tidy Lynx Apr 22, 2019 at 19:40

Layout is jumping after loading.

0:05

iPhone 6 Plus, iOS 11.2

Magic Otter Apr 24, 2019 at 09:56

I don’t see any jumps in this video

Tidy Lynx Apr 22, 2019 at 19:42

Can't show tooltip with tap gesture. Has to do horizontal scrolling in order to see tooltip for the first time.