SHLineGraphView

SHLineGraphView is a simple and efficient reusable UIView subview which you can use to create line graphs. It uses Core Graphics and Core Animation to create the light weight graphs. it is easy to use/understand and completely customizable.

• Single Filled Graph

• Single Unfilled Graph

• Multiple Unfilled Graph

• Multiple filled Graph

###v1.0.6 Release Notes

• fixed issue #1
• fixed issue #2
• changed y-axis label side margins from internal constant to a customisable SHLineGraph theme key #3

##How To Use It

  //initate the graph view
  SHLineGraphView *_lineGraph = [[SHLineGraphView alloc] initWithFrame:CGRectMake(0, 0, 568, 320)];
  
  //set the main graph area theme attributes

  /**
   *  theme attributes dictionary. you can specify graph theme releated attributes in this dictionary. if this property is
   *  nil, then a default theme setting is applied to the graph.
   */  
  NSDictionary *_themeAttributes = @{
                                     kXAxisLabelColorKey : [UIColor colorWithRed:0.48 green:0.48 blue:0.49 alpha:0.4],
                                     kXAxisLabelFontKey : [UIFont fontWithName:@"TrebuchetMS" size:10],
                                     kYAxisLabelColorKey : [UIColor colorWithRed:0.48 green:0.48 blue:0.49 alpha:0.4],
                                     kYAxisLabelFontKey : [UIFont fontWithName:@"TrebuchetMS" size:10],
                                     kPlotBackgroundLineColorKye : [UIColor colorWithRed:0.48 green:0.48 blue:0.49 alpha:0.4]
                                     };
  _lineGraph.themeAttributes = _themeAttributes;
  
  //set the line graph attributes
  
  /**
   *  the maximum y-value possible in the graph. make sure that the y-value is not in the plotting points is not greater
   *  then this number. otherwise the graph plotting will show wrong results.
   */
  _lineGraph.yAxisRange = @(98);
  
  /**
   *  y-axis values are calculated according to the yAxisRange passed. so you do not have to pass the explicit labels for
   *  y-axis, but if you want to put any suffix to the calculated y-values, you can mention it here (e.g. K, M, Kg ...)
   */
  _lineGraph.yAxisSuffix = @"K";
  
  /**
   *  an Array of dictionaries specifying the key/value pair where key is the object which will identify a particular
   *  x point on the x-axis line. and the value is the label which you want to show on x-axis against that point on x-axis.
   *  the keys are important here as when plotting the actual points on the graph, you will have to use the same key to
   *  specify the point value for that x-axis point.
   */
  _lineGraph.xAxisValues = @[
                             @{ @1 : @"JAN" },
                             @{ @2 : @"FEB" },
                             @{ @3 : @"MAR" },
                             @{ @4 : @"APR" },
                             @{ @5 : @"MAY" },
                             @{ @6 : @"JUN" },
                             @{ @7 : @"JUL" },
                             @{ @8 : @"AUG" },
                             @{ @9 : @"SEP" },
                             @{ @10 : @"OCT" },
                             @{ @11 : @"NOV" },
                             @{ @12 : @"DEC" }
                             ];
  
  //create a new plot object that you want to draw on the `_lineGraph`
  SHPlot *_plot1 = [[SHPlot alloc] init];
  
  //set the plot attributes
  
  /**
   *  Array of dictionaries, where the key is the same as the one which you specified in the `xAxisValues` in `SHLineGraphView`,
   *  the value is the number which will determine the point location along the y-axis line. make sure the values are not
   *  greater than the `yAxisRange` specified in `SHLineGraphView`.
   */
  _plot1.plottingValues = @[
                            @{ @1 : @65.8 },
                            @{ @2 : @20 },
                            @{ @3 : @23 },
                            @{ @4 : @22 },
                            @{ @5 : @12.3 },
                            @{ @6 : @45.8 },
                            @{ @7 : @56 },
                            @{ @8 : @97 },
                            @{ @9 : @65 },
                            @{ @10 : @10 },
                            @{ @11 : @67 },
                            @{ @12 : @23 }
                            ];
  
  /**
   *  this is an optional array of `NSString` that specifies the labels to show on the particular points. when user clicks on
   *  a particular points, a popover view is shown and will show the particular label on for that point, that is specified
   *  in this array.
   */
  NSArray *arr = @[@"1", @"2", @"3", @"4", @"5", @"6" , @"7" , @"8", @"9", @"10", @"11", @"12"];
  _plot1.plottingPointsLabels = arr;
  
  //set plot theme attributes
  
  /**
   *  the dictionary which you can use to assing the theme attributes of the plot. if this property is nil, a default theme
   *  is applied selected and the graph is plotted with those default settings.
   */
  
  NSDictionary *_plotThemeAttributes = @{
                                         kPlotFillColorKey : [UIColor colorWithRed:0.47 green:0.75 blue:0.78 alpha:0.5],
                                         kPlotStrokeWidthKey : @2,
                                         kPlotStrokeColorKey : [UIColor colorWithRed:0.18 green:0.36 blue:0.41 alpha:1],
                                         kPlotPointFillColorKey : [UIColor colorWithRed:0.18 green:0.36 blue:0.41 alpha:1],
                                         kPlotPointValueFontKey : [UIFont fontWithName:@"TrebuchetMS" size:18]
                                         };
  
  _plot1.plotThemeAttributes = _plotThemeAttributes;
  [_lineGraph addPlot:_plot1];
  
  //You can as much `SHPlots` as you can in a `SHLineGraphView`
  
  [_lineGraph setupTheView];
  
  [self.view addSubview:_lineGraph];

• Single Filled Graph

##Contact Me

Shan Ul Haq (http://grevolution.me)

• g@grevolution.me

• http://sg.linkedin.com/in/grevolution/

• http://twitter.com/gfg5tek

##License

SHLineGraphView is available under the MIT license. See the LICENSE file for more info.