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My project supports Android, iOS and Hongmeng at the same time, but there is no problem using this library on Android, but an error occurs on iOS:  Then modify...
As shown in the figure below, when there is no data, the y-axis coordinate is displayed as 0 0 1 1 1
The code is as follows. I got the date data of the last ten years. I put the time selection in the pop-up window. It will be a little slow...