ios - 将 UIImageView 添加到 rootViewController
<p><p>我只是想在屏幕上显示一个图像，因为我刚刚开始 iOS
发展。我想既然 <code>UIImageView</code> 是 <code>UIView</code> 的子类，我会以类似的方式添加它，但我没有任何运气。我知道这是一个简单的问题，但我们将不胜感激。</p>
<pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions: (NSDictionary *)launchOptions
{
self.window = [ initWithFrame:[ bounds]];
// Override point for customization after application launch.
self.window.rootViewController = ;
UIImage* stallion = ;
UIImageView* iv = ;
iv.image = stallion;
;
;
return YES;
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>试试这样的:</p>
<p>应用委托(delegate):</p>
<pre><code>#import "RootViewController.h"
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [ initWithFrame:[ bounds]];
// Override point for customization after application launch.
//allocate and initialize the root view controller
RootViewController *rootViewController = [ init];
//set the root view controller
self.window.rootViewController = rootViewController;
;
return YES;
}
</code></pre>
<p>创建一个名为 RootViewController 的 UIViewController 子类</p>
<p>.h</p>
<pre><code>#import <UIKit/UIKit.h>
//set the class RootViewController as a subcalss of UIViewController
@interface RootViewController : UIViewController
@end
</code></pre>
<p>.m</p>
<pre><code>//this is one of the life cycle methods of a UIViewController and should already be in the code when the class is created
- (void)viewDidLoad
{
//execute the viewDidLoad method of the superclass (UIViewController)
;
//allocate and initialize the image view
//assign the image view a frame
//x offset from the left = 0.0
//y offset from the top = 0.0
//width = the view controller's view's width (should be the whole screen)
//height = the view controller's view's height(should be the whole screen)
UIImageView *iv = [ initWithFrame:CGRectMake(0.0, 0.0, self.view.frame.size.width, self.view.frame.size.height)];
];
//the background will be red if everything is setup correctly, but the image isn't found
];
//add the image view to the view controller's view
;
}
</code></pre></p>
<p style="font-size: 20px;">关于ios - 将 UIImageView 添加到 rootViewController，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/17756072/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/17756072/
</a>
</p>
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