The chart.js-objc-wrapper from gyetvan-andras

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How to use options and add a legend?

Hi,

Love the library, just starting to use it and absolutely love it. I am struggling though with trying to figure out how to declare and pass options like a legend to my line graph. Can you give an example of how that can be done?

I should have posted this earlier but this is the code I have so far but its throwing a javascript exception error.

- (void)addLine {
    NSArray* labels = @[@"A",@"B",@"C",@"D"];
    NSMutableArray* datasets = [NSMutableArray array];
    for(NSInteger i = 1; i < 4; i++) {
        CWPointDataSet* ds = [[CWPointDataSet alloc] initWithData:@[@([self random:100]),@([self random:100]),@([self random:100]),@([self random:100])]];
        ds.label = [NSString stringWithFormat:@"Label %ld",i];
        CWColor* c1 = [[CWColors sharedColors] pickColor];
        CWColor* c2 = [c1 colorWithAlphaComponent:0.5f];
        ds.fillColor = c2;
        ds.strokeColor = c1;
        
        [datasets addObject:ds];
    }
    CWLineChartOptions* opt = [[CWLineChartOptions alloc] init];
    int varGrid = 1;
    opt.legendTemplate = @"<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].strokeColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>";
    opt.scaleGridLineWidth = [NSNumber numberWithInt:varGrid];
    
    CWLineChartData* lcd = [[CWLineChartData alloc] initWithLabels:labels andDataSet:datasets];
    self.lineChart = [[CWLineChart alloc] initWithWebView:self.webview name:@"LineChart1" width:300 height:200 data:lcd options:opt];
    
    [self.lineChart addChart];
}

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