Question

I was looking for some ready code so I could insert my data, labels etc. into a function and receive a ready google-chart like this.

But I didn’t find any. Any ideas?

Answer 1

In the mean time, I wrote a function that receive all the necessary parameters, creates a google chart and converts it UIImage. Here it is:

-(UIImage )produceGoogleChartImage:(NSString)title

                           xAxis:(NSArray*)axisXLabels
                          yAxis:(NSArray*)axisYLabels
                        andData:(NSArray*)dataValues
                          color:(NSString*)lineColor
                     chartWidth:(NSNumber*)width
                     chartHight:(NSNumber*)hight
                    lagendLabel:(NSString*)legend
                       minScale:(NSNumber*)minScale
                       maxScale:(NSNumber*)maxScale{

NSMutableString *myurl = [NSMutableString stringWithString:@"http://chart.googleapis.com/chart?chxl=0:|"];


//axisXLabels
int countAxisXLabels = [axisXLabels count];

for(NSUInteger i = 0; i < countAxisXLabels; ++i)
{
    NSNumber *value = [axisXLabels objectAtIndex:i];
    [myurl appendFormat:@"%@", value];
    if(i < countAxisXLabels - 1)
        [myurl appendString:@"|"];
}

[myurl appendString:@"|1:|"];


//axisYLabels
 int countAxisYLabels = [axisYLabels count];
for(NSUInteger i = 0; i < countAxisYLabels; ++i)
{
    NSNumber *value = [axisYLabels objectAtIndex:i];
    [myurl appendFormat:@"%@", value];
    if(i < countAxisYLabels - 1)
        [myurl appendString:@"|"];
}

[myurl appendString:@"&chxr=0,0,105|1,3.333,100&chxt=x,y&chs="];

//size
[myurl appendFormat:@"%@x%@&cht=lc&chd=t:", width,hight];

//dataValues
int countDataValues = [dataValues count];

for(NSUInteger i = 0; i < countDataValues; ++i)
{
    NSNumber *value = [dataValues objectAtIndex:i];
    [myurl appendFormat:@"%@", value];
    if(i < countDataValues - 1)
    [myurl appendString:@","];
}

//legend
[myurl appendFormat:@"&chdl=%@&chg=25,50&chls=2&",legend];

//color
[myurl appendFormat:@"chm=o,%@,0,-2,8&chco=%@",lineColor,lineColor];

//title
[myurl appendFormat:@"&chtt=+%@",title];

//scale
[myurl appendFormat:@"&chds=%@,%@",minScale,maxScale];



NSString *theurl=[myurl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSMutableURLRequest *theRequest=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:theurl]

cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];

NSURLResponse* response;
NSError* error;
NSData *imageData=[NSURLConnection sendSynchronousRequest:theRequest returningResponse:&response

error:&error];
NSLog(@”%@”,error);
NSLog(@”%@”,response);
NSLog(@”%@”,imageData);

UIImage *myimage = [[UIImage alloc] initWithData:imageData];


return myimage;

// Chart Wizard: https://developers.google.com/chart/image/docs/chart_wizard
 }

And here is the test function:

-(void)test{

NSString* title = @"Height History";
NSArray *axisXLabels = [NSArray arrayWithObjects:
                       @"Jan",
                       @"Feb",
                       @"Mar",
                       @"Jun",
                       @"Jul",
                       @"Aug",
                       nil];


NSArray *axisYLabels = [NSArray arrayWithObjects:
                        [NSNumber numberWithInt:0],
                        [NSNumber numberWithInt:50],
                        [NSNumber numberWithInt:150],
                        [NSNumber numberWithInt:200],
                        nil];

NSArray *dataValues = [NSArray arrayWithObjects:
                       [NSNumber numberWithInt:130],
                       [NSNumber numberWithInt:140],
                       [NSNumber numberWithInt:140],
                       [NSNumber numberWithInt:150],
                       [NSNumber numberWithInt:170],
                       [NSNumber numberWithInt:180],
                       nil];

NSString *lineColor = @"FF9900";

NSNumber *width = [NSNumber numberWithInt:300];

NSNumber *hight = [NSNumber numberWithInt:200];

NSNumber *minScale = [NSNumber numberWithInt:0];

NSNumber *maxScale = [NSNumber numberWithInt:200];

NSString *legendLabel = @"cm";

UIImage *myimage =[self produceGoogleChartImage:title xAxis:axisXLabels yAxis:axisYLabels andData:dataValues color:lineColor

chartWidth:width chartHight:hight lagendLabel:legendLabel
minScale:minScale maxScale:maxScale];

_chartImage.image=myimage;

}

You should get image, like the one in the question.