iOS：繪圖畫虛線

iOS：繪圖畫虛線

//此方法目前只能添加在self視圖上（如果有視圖在self視圖上，可能會遮蓋線條），畫的是虛線//調用[self drawRect:self.frame];//覆寫- (void)drawRect:(CGRect)rect{    CGContextRef context = UIGraphicsGetCurrentContext();    CGContextBeginPath(context);    CGContextSetLineWidth(context, 1 *kScreenScale);//線條長度    CGContextSetStrokeColorWithColor(context, [UIColor colorWithHex:@"#959595"].CGColor);//線條顏色    CGFloat lengths[] = {2*kScreenScale,1*kScreenScale};//設定虛線    CGContextSetLineDash(context, 0, lengths, 2);//設定虛線    CGContextMoveToPoint(context, 5 *kScreenScale, 3*kScreenScale);//起點    CGContextAddLineToPoint(context, 360*kScreenScale, 3*kScreenScale);//畫到第一個點    CGContextAddLineToPoint(context, 362*kScreenScale, 5*kScreenScale);//畫到第二個點    CGContextAddLineToPoint(context, 362*kScreenScale, 100*kScreenScale);//以下類推    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);//結束}