Setting BEMSimpleLineGraph graph in UITableView

Question

While I am working on my application, I am faced with a new situation. I am trying to load 2 different graphs [using BEMSimpleLineGraph] each into a different UITableView line. I created a custom cell containing a UIView that inherits from BEMSimpleLineGraphView. My controller species naturally inherits from UIViewController, BEMSimpleLineGraphDelegate, BEMSimpleLineGraphDataSource, UITableViewDataSourceand UITableViewDelegate.

UITableViewDataSource and BEMSimpleLineGraphDataSource have the required methods, but when I declare my methods for viewing the table numberOfRowsInSection and cellForRowAtIndexPath, I can not put the numberOfPointsInLineGraph and valueForPointAtIndex methods inside cellForRowAtIndexPath, because it does not meet the DIMSource BEAM requirements for BEMS.

Here is my current class:

import Foundation

class FlightsDetailViewController: UIViewController, BEMSimpleLineGraphDelegate, BEMSimpleLineGraphDataSource, UITableViewDataSource, UITableViewDelegate {

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 2
}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cell: FlightsDetailCell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as FlightsDetailCell

    cell.userInteractionEnabled = false

    cell.graphView.enableBezierCurve = true
    cell.graphView.enableReferenceYAxisLines = true
    cell.graphView.enableYAxisLabel = true
    cell.graphView.colorYaxisLabel = UIColor.whiteColor()

    cell.graphView.delegate = self
    cell.graphView.dataSource = self

    return cell

}

func lineGraph(graph: BEMSimpleLineGraphView!, valueForPointAtIndex index: Int) -> CGFloat {
    let data = [1.0,2.0,3.0,2.0,0.0]
    let data2 = [2.0,0.0,2.0,3.0,5.0]
    return CGFloat(data[index])
}

func numberOfPointsInLineGraph(graph: BEMSimpleLineGraphView!) -> Int {
    return 5
}
}

As if, for example, the first graph displayed data from data, and the second displayed graph data from data2. Now my graphs are displayed perfectly, but I can’t figure out how to define independent datasets for each graph. How can I do that?

Answer 1

You need to check which instance of your graph calls the datasource / delegate resource. You can find out by comparing the parameter lineGraphincluded in the datasource / delegate methods to your graph instances.

I am not familiar with fast enough, here is how you can do it in Objective-C.

- (CGFloat)lineGraph:(BEMSimpleLineGraphView *)graph valueForPointAtIndex:(NSInteger)index 
{
    if ([graph isEqual:self.myGraph1])
    {
        return data;
    }
    else
    {
        return data2;
    }
}