直线
1.基本方法
-(void)addline
{
// 1.获取图形上下文
CGContextRef ref = UIGraphicsGetCurrentContext();
// 2.描述路径
// 创建路径
CGMutablePathRef path = CGPathCreateMutable();
//在路径上添加起点
CGPathMoveToPoint(path, NULL, 50, 50);
// 添加一条线(另一点坐标)
CGPathAddLineToPoint(path, NULL, 200, 200);
// 3.把路径添加到图形上下文
CGContextAddPath(ref, path);
// 4.渲染上下文
CGContextStrokePath(ref);
}
2底层默认创建了路径
#pragma mark - 默认底层封装了路径
-(void)addline1
{
CGContextRef ref = UIGraphicsGetCurrentContext();
CGContextMoveToPoint(ref, 50, 50);
CGContextAddLineToPoint(ref, 200, 200);
CGContextStrokePath(ref);
}
3贝塞尔画直线
#pragma mark - UIBezierPath曲线画直线
-(void)addline2{
UIBezierPath * path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(50, 50)];
[path addLineToPoint:CGPointMake(200, 200)];
[path stroke];
}
效果图
直线
折线
1.一样的颜色
#pragma mark - 折线
-(void)addline3
{
CGContextRef ref = UIGraphicsGetCurrentContext();
CGContextMoveToPoint(ref, 50, 50);
CGContextAddLineToPoint(ref, 100, 50);
CGContextAddLineToPoint(ref, 100, 200);
CGContextAddLineToPoint(ref, 200, 100);
//设置颜色
[[UIColor redColor] setStroke];
// 设置线宽
CGContextSetLineWidth(ref, 6);
// 设置角的连接样式
CGContextSetLineJoin(ref, kCGLineJoinBevel);
// 设置顶角样式
CGContextSetLineCap(ref, kCGLineCapRound);
// 渲染
CGContextStrokePath(ref);
}
折线
2.两条线设置各自的样式
#pragma mark - 两条线
-(void)addtwoLine
{
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(50, 50)];
[path addLineToPoint:CGPointMake(100, 100)];
path.lineWidth = 10;
[[UIColor redColor] setStroke];
[path stroke];
//画i第二条线
UIBezierPath * path1 = [UIBezierPath bezierPath];
[path1 moveToPoint:CGPointMake(50, 80)];
[path1 addLineToPoint:CGPointMake(100, 130)];
path1.lineWidth = 8;
[[UIColor purpleColor] setStroke];
[path1 stroke];
}
两条线
曲线
#pragma mark - 画曲线
-(void)addCurve
{
CGContextRef ref = UIGraphicsGetCurrentContext();
CGContextMoveToPoint(ref, 0, 50);
/**
CGFloat cpx // 控制点的X
CGFloat cpy // 控制点的Y
*/
CGContextAddQuadCurveToPoint(ref, 50, 5 , 100, 50);
CGContextStrokePath(ref);
}
曲线
圆角长方形,椭圆
#pragma mark - 圆角长方形,椭圆
-(void)circleLine
{
//圆角长方形
// UIBezierPath * path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(20, 20, 150, 150) cornerRadius:75];
// [path stroke];
// 椭圆
UIBezierPath * path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(20, 20, 180, 100)];
[path fill];
}
椭圆
扇形
#pragma mark - 画扇形
-(void)addLine4
{
/**
画圆弧
CGPoint 中心点
radius 半径
startAngle 开始弧度
endAngle 结束弧度
clockwise YES 顺时针 NO逆时针
*/
CGPoint center = CGPointMake(100, 100);
UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:center radius:80 startAngle:0 endAngle:M_PI_2 clockwise:YES];
//画扇形
[path addLineToPoint:center];
// 封闭图形
// [path closePath];
// 渲染
// [path stroke];
// 填充的话默认就封闭图形
[path fill];
}
扇形
