一，效果图。

二，工程图。

三，代码。

RootViewController.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    self.title=@"平面化的饼图";
    
    //隐藏导航条
    self.navigationController.navigationBarHidden=YES;
    
    CLMView *cv = [[CLMView alloc] initWithFrame:CGRectMake(0, 0, 320, 440)];
    
    cv.titleArr = [NSArray    arrayWithObjects:@"iphone", @"sybian", @"windowbile", @"mego",@"android",nil];
    cv.valueArr = [NSArray arrayWithObjects:[NSNumber numberWithFloat:20],[NSNumber numberWithFloat:20],\
                   [NSNumber numberWithFloat:20],[NSNumber numberWithFloat:20],[NSNumber numberWithFloat:20],nil];
    cv.colorArr = [NSArray arrayWithObjects:[UIColor yellowColor], [UIColor blueColor], [UIColor brownColor], [UIColor purpleColor] , [UIColor orangeColor],nil];
    
    [self.view addSubview: cv];
}