iOS：绘图画虚线

标签：ios   虚线   

//此方法目前只能添加在self视图上（如果有视图在self视图上，可能会遮盖线条），画的是虚线
//调用
[self drawRect:self.frame];
//覆写
- (void)drawRect:(CGRect)rect
{
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextBeginPath(context);
    CGContextSetLineWidth(context, 1 *kScreenScale);//线条长度
    CGContextSetStrokeColorWithColor(context, [UIColor colorWithHex:@"#959595"].CGColor);//线条颜色
    CGFloat lengths[] = {2*kScreenScale,1*kScreenScale};//设置虚线
    CGContextSetLineDash(context, 0, lengths, 2);//设置虚线
    CGContextMoveToPoint(context, 5 *kScreenScale, 3*kScreenScale);//起点
    CGContextAddLineToPoint(context, 360*kScreenScale, 3*kScreenScale);//画到第一个点
    CGContextAddLineToPoint(context, 362*kScreenScale, 5*kScreenScale);//画到第二个点
    CGContextAddLineToPoint(context, 362*kScreenScale, 100*kScreenScale);//以下类推
    CGContextAddLineToPoint(context, 360*kScreenScale, 101*kScreenScale);
    CGContextAddLineToPoint(context, 5*kScreenScale, 101*kScreenScale);
    CGContextAddLineToPoint(context, 4*kScreenScale, 100*kScreenScale);
    CGContextAddLineToPoint(context, 4*kScreenScale, 5*kScreenScale);
    CGContextAddLineToPoint(context, 5 *kScreenScale, 3*kScreenScale);
    CGContextStrokePath(context);//收尾
    CGContextClosePath(context);//结束
}

iOS：绘图画虚线

标签：ios   虚线   

原文地址：http://blog.csdn.net/u013243469/article/details/45559081