iOS 颜色选择器：HRColorPicker

HRColorPicker 是 iOS 轻量级的颜色选择器，非常容易使用，无论是针对实际用户还是开发者。 

colorPickerView = [[HRColorPickerView alloc] init];  colorPickerView.color = self.color;  [colorPickerView addTarget:self                      action:@selector(action:)            forControlEvents:UIControlEventValueChanged];  [self.view addSubview:colorPickerView];

项目主页：http://www.open-open.com/lib/view/home/1403409534010