如何在iOS中用一条线连接两个按钮(点)? [英] How to connect two buttons( dots) with a line in iOS?

问题描述

我要创建一个项目，在该项目中，我必须触摸一个点并将其与另一个点连接，然后再将其连接到另一个点.当我将一个点与另一个点连接在一起时，线将在它们之间创建.

I want to make a project in which I have to touch one dot and connect it with another dot and after connect it to another dot. When I connect one dot with another dot the line will create between them.

实际上，当我单击/触摸一个点时，将显示该线，而当我单击第二个点时，将在两个点之间创建该线.

Actually when I click/ touch one dot The line will show and When I touch second dot the line will create between the two dots.

我还无法执行此操作，我正在尝试并在网上搜索，但仍无法找到解决方案.

I am not able to do this yet, I am trying and searching on the net but unable to find the solution yet.

这是我的需要像这样的 https ://play.google.com/store/apps/details?id = zok.android.dots& hl = zh_CN

This is my need Like this one https://play.google.com/store/apps/details?id=zok.android.dots&hl=en

我认为这是由UIGesture Recogniser完成的吗?还是这其他?我该如何实现?

I think this is done by UIGesture Recogniser? Or is this something else? How I can achieve this?

任何想法或专家的建议都将受到欢迎.

Any Idea or suggestions from experts would be highly welcome.

推荐答案

根据您的要求修改此代码

Modify this code according to your requiements

CGContextRef context = UIGraphicsGetCurrentContext();
UIColor *currentColor = [UIColor blackColor];
CGContextSetStrokeColorWithColor(context, currentColor.CGColor);
CGContextSetLineWidth(context, 2.0);
CGContextBeginPath(context);
CGContextMoveToPoint(context, touchStart.x, touchStart.y);
CGContextAddLineToPoint(context, touchEnd.x, touchEnd.y);
CGContextStrokePath(context);

@Nisha:

制作CGPoint touchStart和touchEnd的角点实例，并像这样获得它们:

Make gloabal instances of CGPoint touchStart and touchEnd and get them like this:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
touchEnd = CGPointZero;
touchStart = CGPointZero;
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self];
NSLog(@"start point >> %@",NSStringFromCGPoint(point));
    touchStart = point;
}

}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [touches anyObject];
    CGPoint point = [touch locationInView:self];
    touchEnd = point; 
    [self setNeedsDisplay];

}

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