Why the coordinate points and the X axis the above data is not aligned?

[dadigua2333]

I want "point C "and "X_value C" on the same vertical line, but now "point C" and "unknowValue" are on the same line.
In this picture below,as you see , I just added 4 points to chart.I want them to align one by one.

My second question is:

I want the X axis to always show the point I set.But when I zoom in on the Chart scale.
As shown below.
The data on the X axis is not my addition.
How to clear them?

[danielgindi]

I honestly don't understand your questions

[Huang-Libo]

@danielgindi
Forgive his English is not good...Maybe I can do some translation for you.
He @dadigua2333 may means :

1. The time label's value on xAxis is not what he has set in initWithX:y: function.The answer: the value on xAxis has been rounded in AxisRendererBase.swift.You can learn more in (v3.0 + Swift3.0)IChartAxisValueFormatter's protocol function pass on a unexpected value(double value discard) #1503.
2. There many label with same value(eg: 12:05) on xAxis. The answer: user granularity to handle this problem.

[dadigua2333]

@Huang-Libo
谢谢你的翻译~ 我的英文实在是不太好.用百度翻译 写上来的.
我试过用granularity 这个属性来调整. 有一个问题是:我的这个表格的X轴数据的个数不确定. 因为检测体温的总时长由用户自己决定. 难道要我计算出一个公式,加载一个动态的 granularity么?

@danielgindi
I will immediately edit my question. Thanks for your reading.

[danielgindi]

We need a code example to understand what's going on. Labels show the string that you return from the formatter. You can see a working demo in the Time Line Chart .
It is possible that you've set centerAxisLabelsEnabled to true, which is meant for centering below bars etc.

[liuxuan30]

I think he wants to say that the point c's x value is some value other than 12:16, it wants the x axis to show point c's x value.