iphone - ImageView 在设备方向更改时消失 - iPhone - objective-c
<p><p>当设备的方向在 iPhone 上发生变化并且我遇到了问题时，我正在学习如何更改 UI 布局。</p>
<p>我有一个主从应用程序，如果我在详细 View 中更改方向，一切正常，但如果我在主视图 Controller 中更改它然后推送详细 View ，除了我的图像之外一切正常 View 不显示..</p>
<p>下面是相关代码:</p>
<pre><code>- (void)viewDidLoad
{
;
// Do any additional setup after loading the view, typically from a nib.
UIDeviceOrientation orientation = [ orientation];
if (UIDeviceOrientationIsLandscape(orientation)){
;
}
else if (UIDeviceOrientationIsPortrait(orientation)){
;
}
//set up UI elements
nameLabel.text = name;
dateOfBirthLabel.text = dateOfBirth;
numberOfVotesLabel.text = numberOfVotes;
reasonForFameLabel.text = reasonForFame;
numberOfStarsLabel.text = numberOfStars;
;
//Perform this method in background (gets the product image from URL)
;
//Gives UIImageView memeThumb a orange border
//Must import the QuartsCore Framework for this to work
CGColor]];
;
}
- (void) layoutLandscape{
imageView.frame = CGRectMake(20, 20, 200, 150);
indicator.frame = CGRectMake(150, 40, 20, 20);
nameMarker.frame = CGRectMake(70, 115, 51, 150);
dateOfBirthMarker.frame = CGRectMake(20, 135, 101, 180);
numberOfVotesMarker.frame = CGRectMake(233, 10, 134, 30);
reasonForFameMarker.frame = CGRectMake(230, 60, 137, 30);
numberOfStarsMarker.frame = CGRectMake(236, 110, 130, 30);
nameLabel.frame = CGRectMake(125, 175, 135, 30);
dateOfBirthLabel.frame = CGRectMake(125, 210, 135, 30);
numberOfVotesLabel.frame = CGRectMake(372, 10, 134, 30);
reasonForFameLabel.frame = CGRectMake(372, 60, 135, 30);
numberOfStarsLabel.frame = CGRectMake(372, 110, 135, 30);
}
- (void) layoutPortrait{
imageView.frame = CGRectMake(20, 20, 280, 197);
indicator.frame = CGRectMake(150, 109, 20, 20);
nameMarker.frame = CGRectMake(106, 225, 51, 30);
dateOfBirthMarker.frame = CGRectMake(56, 263, 101, 30);
numberOfVotesMarker.frame = CGRectMake(23, 301, 134, 30);
reasonForFameMarker.frame = CGRectMake(20, 339, 137, 30);
numberOfStarsMarker.frame = CGRectMake(27, 377, 130, 30);
nameLabel.frame = CGRectMake(165, 225, 135, 30);
dateOfBirthLabel.frame = CGRectMake(165, 263, 135, 30);
numberOfVotesLabel.frame = CGRectMake(165, 301, 134, 30);
reasonForFameLabel.frame = CGRectMake(165, 339, 135, 30);
numberOfStarsLabel.frame = CGRectMake(165, 377, 135, 30);
}
- (void) loadImage {
NSURL *imageURL = ;
NSData *data = ;
UIImage *image = ;
imageView.image = image;
;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation{
UIDeviceOrientation orientation = [ orientation];
if (UIDeviceOrientationIsLandscape(orientation)) {
;
}
else if (UIDeviceOrientationIsPortrait(orientation)) {
;
}
}
</code></pre>
<p>有人有什么想法吗？ </p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>如果 View 已经创建并驻留在内存中，则不会调用viewDidLoad。</p>
<p>尝试将您的代码移至</p>
<pre><code>-(void) viewWillAppear
{
UIDeviceOrientation orientation = [ orientation];
if (UIDeviceOrientationIsLandscape(orientation)){
;
}
else if (UIDeviceOrientationIsPortrait(orientation)){
;
}
}
</code></pre></p>
<p style="font-size: 20px;">关于iphone -ImageView 在设备方向更改时消失 - iPhone -objective-c ，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/9861108/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/9861108/
</a>
</p>
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