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UIProgressView在后台线程中更新

[英]UIProgressView update in background thread

原文 2017-06-13 10:35:18 4 1 objective-c/ iphone/ multithreading/ user-interface/ uiview

I have to call function calculating some thing on MainThread . 我必须调用函数在MainThread上计算一些东西。 When calculation process running, I can call UIProgressView to update UI. 当计算过程运行时，我可以调用UIProgressView来更新UI。

When I just call update function, it's working but update UI at last 当我只调用更新功能时，它正在工作，但最后更新了用户界面

I use performSelectorInBackground calling update function and it's work fine . 我使用performSelectorInBackground调用更新功能，它工作正常 。

Why use performSelectorInBackground can work 为什么使用performSelectorInBackground可以工作

click here to show GIF 点击此处显示GIF

I have seen this What's happen if control UI by performSelectorInBackground? 我已经看到了，如果通过performSelectorInBackground控制UI会发生什么？ , but it not explain why performSelectorInBackground working. ，但没有说明为什么performSelectorInBackground工作。

the sample code 示例代码
https://github.com/g78101/progressViewTest https://github.com/g78101/progressViewTest

1 个解决方案

I find some soultion 我觉得有些伤心

From the doc : 从文档：
[myObj performSelectorInBackground:@selector(doSomething) withObject:nil]; [myObj performSelectorInBackground：@selector（doSomething）withObject：nil];
The effect of calling this method is the same as if you called the detachNewThreadSelector:toTarget:withObject: method of NSThread with the current object, selector, and parameter object as parameters. 调用此方法的效果与使用当前对象，选择器和参数对象作为参数调用NSThread的detachNewThreadSelector：toTarget：withObject：方法的效果相同。