.

Author: michalkonturek

README.md

@@ -19,4 +19,80 @@ Source code of this project is available under the standard MIT license. Please
 
 ### Bar Graph
 
-### Line Graph
+![Build Platform](images/bar-graph.png)
+
+https://github.com/michalkonturek/GraphKit/blob/master/LICENSE
+
+Initialize `GKBarGraph` from nib or programmatically:
+
+```
+CGRect frame = CGRectMake(0, 40, 320, 200);
+self.graphView = [[GKBarGraph alloc] initWithFrame:frame];
+```
+
+then set `GKGraphViewDataSource` 
+
+```
+self.graphView.dataSource = self;
+```
+
+and call `draw` method.
+
+```
+[self.graphView draw];
+```
+
+
+Please see [example][BAR].
+
+[BAR]:https://github.com/michalkonturek/GraphKit/blob/master/GraphKit/Example/ExampleBarGraphVC.m
+
+
+#### `GKBarGraphDataSource` Protocol
+
+```
+@required
+- (NSInteger)numberOfBars;
+- (NSNumber *)valueForBarAtIndex:(NSInteger)index;
+
+@optional
+- (UIColor *)colorForBarAtIndex:(NSInteger)index;
+- (CFTimeInterval)animationDurationForBarAtIndex:(NSInteger)index;
+- (NSString *)titleForBarAtIndex:(NSInteger)index;
+```
+
+
+### Line Graph
+
+![Build Platform](images/line-graph.png)
+
+```
+CGRect frame = CGRectMake(0, 40, 320, 200);
+self.graphView = [[GKLineGraph alloc] initWithFrame:frame];
+
+self.graph.dataSource = <<data-source>>;
+self.graph.lineWidth = 3.0;
+
+[self.graph draw];
+```
+
+Please see [example][LINE].
+
+[LINE]:https://github.com/michalkonturek/GraphKit/blob/master/GraphKit/Example/ExampleLineGraph.m
+
+
+#### `GKLineGraphDataSource` Protocol
+
+```
+@required
+- (NSInteger)numberOfLines;
+- (UIColor *)colorForLineAtIndex:(NSInteger)index;
+- (NSArray *)valuesForLineAtIndex:(NSInteger)index;
+
+@optional
+- (CFTimeInterval)animationDurationForLineAtIndex:(NSInteger)index;
+- (NSString *)titleForLineAtIndex:(NSInteger)index;
+```
+
+[@MichalKonturek](https://twitter.com/MichalKonturek)
+