活动指示器在视图控制器导航到另一个视图控制器时未开始动画 [英] Activity Indicator Not start Animating when the view controller is navigate to another view controller

问题描述

我当前在启动另一个视图控制器之前启动了活动指示器，但是它没有开始为活动指示器设置动画.

I currently starting the activity indicator before pushing another view controller but it is not start animating the activity indicator.

[activityindicator startanimating];

[self.navigationcontroller pushviewcontroller:viewcontroller animated:YES];

[activityindicator stopanimating];

推荐答案

创建一个NSThread作为调用选择器，如下所示:

Create a NSThread as call a selector as follows :

[NSThread detachNewThreadSelector:@selector(threadStartAnimating:) toTarget:self withObject:nil];  
// Some code  
[spinner stopAnimating];  
[self.navigationcontroller pushviewcontroller:viewcontroller animated:YES];  

threadStartAnimating:

threadStartAnimating :

-(void)threadStartAnimating:(id)data  
{  
[spinner startAnimating];  
}  

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