画倒计时圈 [英] Draw countdown circles

问题描述

我想在ViewController中绘制一个如下图所示的倒计时：

不幸的是，我对如何实现这一目标一无所知。如果有人可以给我一个线索，我会很高兴。

干杯。

西里尔

解决方案

一个简单的想法，我不想使用任何iOS框架来绘制它：)，只需使用小的 UIWebView 并运行javascript（仅在用户启用javascript的情况下有效，但是嘿，我还没有看到谁不使用javascript）。

Javascript极地时间可以在互联网，开源之类的

上找到，

http://oneorangesoftware.com/polartimer/

更改和编辑一点，然后就可以了！太棒了！

干杯！

如果您不喜欢上面的方法，可以看看这段代码，

http://www.herbert-siojo.com/2011/04/19/drawing-a-countdown-timer-ios/

精心制作，但要获得与您相同的外观，您可能需要进行一些调整！

请注意代码中的这一行，

  [self performSelector：@selector（cancelPie :) withObject：timer afterDelay：sliderIntervalDelay.value]; 
  

只需更改为

  [self performSelector：@selector（cancelPie :) withObject：timer afterDelay：60.0]； 
  

信用：转到将其代码发布在 http://www.herbert-siojo.com/2011 / 04/19 / drawing-a-countdown-timer-ios / 。

I would like to draw, in a ViewController, a countdown like in the following image:

Unfortunately, I don't have any idea on how to realize this. I will be please if someone could give me a clue on this.

Cheers.

Cyril

解决方案

A quick thought, I would not like to draw it by using any iOS frameworks :), Just use small UIWebView and run javascript(Only works if user enables javascript, but hey I have seen no one yet who doesn't use javascript).

Javascript polar time can be found on internet, open source like,

http://oneorangesoftware.com/polartimer/

change and edit a bit and off you go! Awesome time!

Cheers!

If you don't like above approach than you may look into this code,

http://www.herbert-siojo.com/2011/04/19/drawing-a-countdown-timer-ios/

nicely crafted however to achieve same look as yours you may have to tweak a bit!

Beware of this line in code,

[self performSelector:@selector(cancelPie:) withObject:timer afterDelay:sliderIntervalDelay.value];

just change to,

[self performSelector:@selector(cancelPie:) withObject:timer afterDelay:60.0];

Credit : Goes to a developer who posted their code on http://www.herbert-siojo.com/2011/04/19/drawing-a-countdown-timer-ios/.

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