會顯示NSObject顯示UIActivityIndi​​catorView？

Question

我使用NSObject類inwhich我有NSURLConnection的，但我怎麼能顯示UIActivityIndi​​catorView當連接建立和成品.....？我在appdelegate.m文件試圖 inwhich我appdidfnish方法都提到

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

而且我有喜歡

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

個體的方法，但如果我叫過的appdelegate對象這種方法在NSobject.m頁面時，它會不會工作。 我有什麼做的？任何幫助？請？

Answer 1

我不確定，但你在哪裏設置activityIndi​​catorView的框架？我剛剛試過這段代碼，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]; 

，這是onBtnClk方法

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

}