在頁面加載之前顯示圖像

Question

我在ios應用程序中有四個選項卡。我想從視圖加載顯示圖像預覽。我該如何解決它？

Answer 1

在-viewWillAppear:中，顯示您的圖像。然後在-viewDidAppear:中使用dispatch_after塊來延遲設置其餘的用戶界面。

- (void)viewWillAppear:(BOOL)animated 
{ 
    [super viewWillAppear:animated]; 
    self.imageView.image = [UIImage imageNamed:@"myImageName"]; 
} 

- (void)viewDidAppear:(BOOL)animated 
{ 
    [super viewDidAppear:animated]; 
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(myDelayInSeconds * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ 
     // Code to animate removal the image view, 
     // adding new views, or whatever else you need to do here 
    }); 
}