A simple but effective dynamic GraphView implementation for iPhone SDK for float values.

The left image shows a graph with only positive values and without curved lines. The right graph draws from positve and negative values and has the option for curved lines activated.

Screenshot-----Screenshot

Implementing this control into your project is very easy.

#####1) Copy both GraphView.h and GraphView.m into your projet resources.

#####2) In your ViewController.h:

import <UIKit/UIKit.h>
import "GraphView.h"
@interface ViewController : UIViewController <UITextFieldDelegate> {
GraphView *graphView;
}
@property (strong, nonatomic) GraphView *graphView;
@end

#####3) In your ViewController.m:

- (void)viewDidLoad 
{
graphView = [[GraphView alloc]initWithFrame:CGRectMake(10, 10, self.view.frame.size.width-20, 180)];
[graphView setBackgroundColor:[UIColor yellowColor]];
[graphView setSpacing:10];
[graphView setFill:YES];
[graphView setStrokeColor:[UIColor redColor]];
[graphView setZeroLineStrokeColor:[UIColor greenColor]];
[graphView setFillColor:[UIColor orangeColor]];
[graphView setLineWidth:2];
[graphView setCurvedLines:YES];
[self.view addSubview:graphView];
}

Done!

#####To control the graph, use following functions:

1. This will display a graph of float values:

   [graphView setArray:(NSArray)]

2. This will add a point to the graph. You can add as many as you like and even do this dynamically. The graph will update every time a new value has been added:

   [graphView setPoint:(float)]

3. This will reset the graph to all 0 values:

   [graphView resetGraph]

4. This sets the number of values displayed in the graph:

   [graphView setNumberOfPointsInGraph:(int)]

5. This will make the space beneth the graph line fill or not:

   [graphView setFill:(BOOL)]

Thats all!

If you have any more question, please read the comments in GraphView.h and GraphView.m or send me a message.

Please concider the MIT License agreement.