objective-c - 如何在 objective-c 的启动图像上方显示 "Loading..."gif 图像？

Question

我想在应用程序加载数据时在初始屏幕上显示 GIF 图像。

我的启动图像至少显示大约 3 或 4 秒，这就是为什么我想在启动图像上显示加载文本(如 gif 图像)，以便用户认为该应用正在加载。

Answer 1

只需将一个标签添加到您的初始图像和一个 NSTimer 即可定期更改其文本，如下所示

splash = [[UIImageView alloc] initWithFrame:self.window.frame];
splash.image = [UIImage imageNamed:@"splash"];
[self.window addSubview:splash];

这是我用来显示启动画面的代码，然后

NSTimer *loading = [[NSTimer alloc]init];
[loading performSelector:@selector(YOUR_SELECTOR) withObject:YOUR_LABEL afterDelay:0.3f];

YOUR_SELECTOR 是设置标签文本的方法，YOUR_LABEL 是设置文本的标签

编辑 抱歉 NSTimer 实际上我在文本加载中使用了 activityindicator ... 在 application:didFinishLaunchingWithOptions: 方法中

它的代码是

splash = [[UIImageView alloc] initWithFrame:self.window.frame];
splash.image = [UIImage imageNamed:@"splash"];    
[self.window addSubview:splash];
hud = [[MBProgressHUD alloc]initWithView:splash];
[splash addSubview:hud];
hud.labelText = @"Loading...";
[hud show:YES];
[self performSelector:@selector(Load_FirstView) withObject:nil afterDelay:3];
[self.window makeKeyAndVisible];

和Load_FirstView方法如下

-(void)Load_FirstView
{
    [splash removeFromSuperview];
    MasterViewController *masterViewController = [[MasterViewController alloc] initWithNibName:@"MasterViewController" bundle:nil];
    self.navigationController = [[UINavigationController alloc] initWithRootViewController:masterViewController];
    self.navigationController.navigationBar.tintColor = [UIColor blackColor];
    masterViewController.managedObjectContext = self.managedObjectContext;
    self.window.rootViewController = self.navigationController;
    [self.window makeKeyAndVisible];
}