如何在iOS中的两个UIButton之间绘制直线？

Question

I want to draw straight line between two UIButtons. When we touch button 1 the line will appear in black color; when we touch button 3 the line will become red; and when we touch button 2 the line will become Green and end on Button two. So that line will be visible connected two buttons only button 1 and button 2.

Now I want when I click button 4 the new line will appear in orange color. The previous line was end on button-2 and this will be the new line. And same this will connect if I touch button 5.

Same just like kids play matching the quiz game.

Means Tv belongs to electronics (Right), sky belong to Glass (wrong). Just like that I need to connect Button 1 and Button 2 , Button 4 and Button 5.

Any idea or suggestions would be highly welcome.

Answer 1

一种简单的方法是在按钮周围放置一些uiimageviews，并根据每个按钮的作用，根据需要在uiimageviews中添加图像或从uiimageviews中移除图像（使用不同的彩色线条）。

Answer 2

You can do it with the help of images. Just write your logic for replacing, hiding and unhiding the images. It would be a simpler approach.

Answer 3

Use this:

-(void)drawLineWithStartPoint:(CGPoint)startPoint endPoint:(CGPoint)endPoint WithColor:(UIColor *)color
{
    UIBezierPath *aPath = [UIBezierPath bezierPath];

// Set the starting point of the shape.
[aPath moveToPoint:startpoint;

// Draw the lines.
[aPath addLineToPoint:endPoint;
[aPath closePath];
 aPath.lineWidth = 2;
  [aPath fill]; 
  [aPath stroke];

}