iOS饼图绘制

#import "PieView.h"

@implementation PieView

-(void)drawRect:(CGRect)rect{

    CGPointcenter =CGPointMake(rect.size.width*0.5, rect.size.height*0.5);

    CGFloatradius = rect.size.width*0.5-10;

    CGFloatstartAngle =0;

    CGFloatangle =25/100.0*M_PI*2;

    CGFloatendAngle = startAngle + angle;

    UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:startAngle endAngle:endAngle clockwise:YES];

    [pathaddLineToPoint:center];

    [[UIColor blueColor] set];

    [pathfill];

    //第二个扇形

    startAngle = endAngle;

    angle =25/100.0*M_PI*2;

    endAngle = startAngle + angle;

    //让path指针重新指向一个新的对象

    path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:startAngle endAngle:endAngle clockwise:YES];

    //添加一根线到圆心

    [pathaddLineToPoint:center];

    //设置颜色

    [[UIColor greenColor] set];

    //绘制路径

    [pathfill];

    //第三个扇形

    startAngle = endAngle;

    angle =50/100.0*M_PI*2;

    endAngle = startAngle + angle;

    path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:startAngle endAngle:endAngle clockwise:YES];

    [pathaddLineToPoint:center];

    [[UIColor orangeColor] set];

    [pathfill];

}

@end