Quartz2d绘制圆形,内切任意角星

以下代码是在控制器创建View

//创建View

- (void)loadViewForCenter

{

    //创建显示的View

    TempView *tempView = [[TempView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];

    tempView.backgroundColor = [UIColor colorWithRed:0.7625 green:0.8462 blue:1.0 alpha:1.0];

    [self.view addSubview:tempView];

    self.tempView = tempView;

    tempView.colorArray = self.colorArray;

    self.tempView.startAngle = -M_PI_2;

    self.tempView.starCenterPoint = 0;

    self.tempView.loadTime = self.loadTime;

    self.tempView.cutNum = self.pathNum;

    tempView.backgroundColor = [UIColor colorWithRed:arc4random_uniform(255)/255.0 green:arc4random_uniform(255)/255.0 blue:arc4random_uniform(255)/255.0 alpha:0.5];

    tempView.center = self.view.center;

    //创建View设置为大小1的点,作为偏移中心点的连线

    UIView *centerView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 0, 0)];

    centerView.center = CGPointMake(tempView.bounds.size.width/ 2,tempView.bounds.size.height/ 2);

    tempView.centerView = centerView;

    centerView.backgroundColor = [UIColor redColor];

    //将中心View初始化的时候转向第一部分的中间

    centerView.transform = CGAffineTransformRotate(centerView.transform,M_PI /self.pathNum);

    [tempView addSubview:centerView];

}

以下是设置layer上的View

- (void)drawRect:(CGRect)rect {
    

    // 找到 宽和高一半最小的一个, 把这个计算的值, 当做 中心点和半径
    CGFloat centerX = self.frame.size.width/2;
    CGFloat centerY = self.frame.size.height/2;
    // 中心View的中心点
    CGPoint center = CGPointMake(centerX, centerY);
    
    
    
    // 起始位置, 结束位置
    //CGFloat startAngle = 0;
    CGFloat endAngle = 0;
    
    CGAffineTransform centerTransForm = self.centerView.transform;
    
    //循环创建每一个扇形
    for (int i = 0; i < self.cutNum; i++) {
        
        //记录初始的transform
        self.centerView.transform = centerTransForm;
        
        CGFloat path = 1.0 / self.cutNum;
        
        endAngle = 2 * M_PI * path + self.startAngle;
        
        
//        // 绘制大圆形
        UIBezierPath *bezierBigPath = [UIBezierPath bezierPathWithArcCenter:center radius:[UIScreen mainScreen].bounds.size.width/2 startAngle:self.startAngle endAngle:endAngle clockwise:YES];
        
        // 向中心点添加一根线
        [bezierBigPath addLineToPoint:center];

        //非零绕数原则创建小圆
        UIBezierPath *bezierSmallPath = [UIBezierPath bezierPathWithArcCenter:center radius:([UIScreen mainScreen].bounds.size.width/2 - 20) startAngle:endAngle endAngle:self.startAngle clockwise:NO];
        
       //把中心View转向对应部分的中间 并向上偏移
       // self.starCenterPoint = 2 * M_PI /self.cutNum;
        self.centerView.transform = CGAffineTransformRotate(self.centerView.transform,i *(2 * M_PI /self.cutNum) + self.starCenterPoint);
        self.centerView.transform = CGAffineTransformTranslate(self.centerView.transform, 0, -50);
        
         CGPoint point =  CGPointMake(CGRectGetMaxX(self.centerView.frame), CGRectGetMaxY(self.centerView.frame));
        
        [bezierSmallPath addLineToPoint:point];

        //路径组合
        [bezierBigPath appendPath:bezierSmallPath];
        
        // 设置颜色
        [self.colorArray[i] setFill];
        
        [bezierBigPath fill];
        
        // 当一次绘制结束的时候
        self.startAngle = endAngle;

    }
    self.centerView.transform = centerTransForm;
    

 
}