Question

I am trying to pass a Hexadecimal color value from objectiveC to Javascript. I am displaying a graph and I am trying to pass the color to javascript so that I dont need to hardcode it in my html page.

Here is what I do –

In my .m File,

NSArray *colorArray = [NSArray arrayWithObjects:@"FFFFFF",@"000000", nil];

colorString = [[colorArray valueForKey:@"description"] componentsJoinedByString:@","];

In my webViewDidFinishLoad function,

[graphView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"methodName1([%@])", colorString]];

However, the javascript is not able to accept the values.

In my Javascript function, what should I do to accept the values – FFFFFF and 000000 so that I can use them.

I am trying to use the colors like this –

line1.Set('chart.colors', ['FF0000', '000000']);

where instead of giving the hexadecimal values there, I would like to get it from objC.

Update –

Here is the javascript function I use –

function methodName1(val)
{
   alert("hi");
}

However, the function does not even get called.. I feel the issue is with the way I pass the values…

It would be great if someone could help me out with this.

Answer 1

You’re calling

methodName1([FFFFFF,000000]); // will fail since FFFFFF is not defined

But you want

methodName1(['FFFFFF','000000']);