Will it be possible to get something like this? about swiftcharts

[ivnsch]

Hi,
yes it is, take a look at the multiaxis example. For the curved lines you can use layer of the cubic line example. For the little circles on the lines you can copy the layer from show touch coords example. You also find formatted date, dividers and straight guidelines in some of the examples (e.g. candlestick).

[vineethvijayan]

Yes, I looked at the multi axis, but I was not able to hide the X axis, it always shows the both axis.

[ivnsch]

Hide how exactly? In your image the axes are visible...

2015-10-14 6:04 GMT+02:00 vineethvijayan [email protected]:

Yes, I looked at the multi axis, but I was not able to hide the y axis, it
always shows the both axis.

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[vineethvijayan]

I got it working like this 👍

I also tried CubicLinePathGenerator

but the data showing is wrong

[ivnsch]

Hmm ok the curves need tuning, but besides of that what is wrong? Note also that you don't have generate the x axis values using the chart points, you can use regular intervals. When you say hide the axis you mean the axis title? If yes passing an empty string and negative spacing between axes would work (this should be an optional though).

[vineethvijayan]

If I generate the X axis at regular intervals will it solve the cure issue?

[ivnsch]

No the curve needs to be solved directly in the layer. Is this the only issue?

[vineethvijayan]

I am on the process of converting this as in the original pic.

haven't faced anything else as of now.

[ivnsch]

Ok I'll check the curves in the evening (in about 8 hours). For now please continue using lines.

[vineethvijayan]

thanks mate :)

[ivnsch]

Now it's possible to pass tensions values to the cubic line to control the curviness. 4e83383

You need 0.1 or so. For now you will have to use master to get this change. It's stable.

[vineethvijayan]

I am using
pod 'SwiftCharts'
in my pod file and I did 'pod update' still this change is not getting reflected

[vineethvijayan]

One more thing, is this something that is needed to be changed according to data?
Asking this because the data will be dynamic

[ivnsch]

pod update only works with released versions. You have to use

pod 'SwiftCharts', :git => 'https://github.com/i-schuetz/SwiftCharts.git'

in your podfile (and then install or update).
You don't have to change tension depending on data.

[vineethvijayan]

it looks okay but the curves are little bit sharp (irony)

I gave tension 0.1

[ivnsch]

You can try out different tension values. I just committed something else which helps with the sharp corners (doesn't affect the curviness of the lines though).

[vineethvijayan]

Sorry 👎

I tried ranging from 0 to 0.3 it only get worse :(

[ivnsch]

Did you run pod update again to get the last commit?

For further improvement as you see it's possible to pass your own curve generator. You can copy the current one and try to adjust it. Otherwise you can open an issue and I tackle it when I have more time (this will not be in the next days though).

Being practical - With 0.1 tension, the last commit, thicker lines and circles on the corners isn't it close enough to your initial image?

[vineethvijayan]

Yes I did,

this is with tension 0.1

[ivnsch]

Will try something, give me a few minutes.

[vineethvijayan]

Thanks mate and please take your time.

[ivnsch]

Ok, I managed to get a curve like this

with points [(0, 1), (2, 16), (3, 8), (9, -16), (10, -56), (13, -80)]

The issue is that the current implementation has not real interpolation algorithm. For the new curve I used this project: https://github.com/jnfisher/ios-curve-interpolation
Problem with this is it takes some time to add this to the library, for example, for some reason the first and last point are not shown in interpolateCGPointsWithCatmullRom so had to add filler points and interpolateCGPointsWithHermite looks weird.

For now I'd suggest that you pass your own path generator in which you use this project to interpolate the curve. Basically:

return UIBezierPath.interpolateCGPointsWithCatmullRom(points.map{NSValue(CGPoint: $0)}, closed: false, alpha: 1)

(or any other interpolation algorithm)

Keep in mind that you need a bridging header file for this as it's an obj-c project.

If you have more questions feel free to continue commenting this issue.

[vineethvijayan]

For now I will use the straight lines. I am very new to iOS so everything is very sketchy.

Now I have to try and include the bubbles with some labels.

Thanks a lot for your time.