HUChart是一个简单的（但是是第一个）ios的绘制半圆圈图（半饼图）表的工具。绘制半圆图表是为了在某些情况下，用一个小空间去完成一个完整的圆图。

相关特性：

• 半圆图表绘制工具就像一个 UIView 的组件. 可以不费一点力气绘制一个定制的半圆图表。
• 支持 iOS 6.1以上的版本
• 支持ARC

用法如下：

    // Step 1: Create HUSemiCircleChart object with its desire frame      CGRect frame = CGRectMake(25, 30, 250, 300);      HUSemiCircleChart *semiCircleChart = [[HUSemiCircleChart alloc]                                                              initWithFrame:frame];        // Step 2: Setup data      NSMutableArray *data = [NSMutableArray arrayWithObjects:                                      [[HUChartEntry alloc]initWithName:@"Chrome" value:@54.1],                                      [[HUChartEntry alloc]initWithName:@"Firefox" value:@27.2],                                      [[HUChartEntry alloc]initWithName:@"IE" value:@11.7],                                      [[HUChartEntry alloc]initWithName:@"Safari" value:@3.8],                                      [[HUChartEntry alloc]initWithName:@"Others" value:@3.2],                                      nil];      [semiCircleChart setData:data];        // Step 3: Setup color (Optional)      // colors maybe not setup, will be generated automatically      UIColor * color1 = [UIColor colorWithRed:1.0 green:0.0 blue:0.0 alpha:1.0];      UIColor * color2 = [UIColor colorWithRed:0.0 green:1.0 blue:0.0 alpha:1.0];      UIColor * color3 = [UIColor colorWithRed:0.0 green:0.5 blue:0.0 alpha:1.0];      UIColor * color4 = [UIColor colorWithRed:1.0 green:0.0 blue:1.0 alpha:1.0];      UIColor * color5 = [UIColor colorWithRed:0.0 green:0.0 blue:1.0 alpha:1.0];        NSMutableArray *colors = [NSMutableArray arrayWithObjects:  color1, color2,                                                                  color3, color4,                                                                  color5, nil];      [semiCircleChart setColors:colors];        // Step 4: Setup Chart Title      [semiCircleChart setTitle:@"Browser Shared"];        // Step 5: Determine whether chart element text is shown or not.      //          SHOW_PORTION_TEXT to show element's name      //          SHOW_PORTION_VALUE to show element's value      //          DONT_SHOW_PORTION   to show element without any text      semiCircleChart.showPortionTextType = SHOW_PORTION_TEXT;

项目主页：http://www.open-open.com/lib/view/home/1386251802626