会显示NSObject显示UIActivityIndi​​catorView？

Question

我使用NSObject类inwhich我有NSURLConnection的，但我怎么能显示UIActivityIndi​​catorView当连接建立和成品.....？我在appdelegate.m文件试图 inwhich我appdidfnish方法都提到

Search = [[UIActivityIndicatorView alloc] 
    initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; 
    [Search setCenter:CGPointMake(160, 240)]; 
    [window addSubview: Search]; 

而且我有喜欢

 -(void)anim 
{ 
    [search startAnimating]; 
} 

个体的方法，但如果我叫过的appdelegate对象这种方法在NSobject.m页面时，它会不会工作。 我有什么做的？任何帮助？请？

Answer 1

我不确定，但你在哪里设置activityIndi​​catorView的框架？我刚刚试过这段代码，它的工作原理非常完美。

activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; 
[activityIndicator setCenter:CGPointMake(160, 240)]; 
[activityIndicator startAnimating]; 
[window addSubview:activityIndicator]; 
UIButton* button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
[button setFrame:CGRectMake(100, 300, 120, 50)]; 
[button setTitle:@"press me" forState:UIControlStateNormal]; 
[button addTarget:self action:@selector(onBtnClk) forControlEvents:UIControlEventTouchUpInside]; 
[window addSubview:button]; 
[window makeKeyAndVisible]; 

，这是onBtnClk方法

- (void) onBtnClk{ 
if([activityIndicator isAnimating]){ 
[activityIndicator stopAnimating]; 
}else{ 
[activityIndicator startAnimating]; 
} 

}