如何在 iOS 的自动布局中设置视图的动态宽度和高度？
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How to set dynamic width & height of a view in autolayout in iOS?
提问by TechChain
I have a UIView in my super view.I have set it some constraints.Now I want the size of view should be different on different devices.If I set the fix width & height then I get the wrong result.I have tried to user aspect ratio but that make a view too big or too small on multiple devices.
我的超级视图中有一个 UIView。我已经给它设置了一些约束。现在我希望视图的大小在不同的设备上应该不同。如果我设置了固定宽度和高度，那么我得到了错误的结果。我尝试过用户纵横比，但这会使多个设备上的视图过大或过小。
I want the height & width should increase in equal proportion that it must look same all devices.I want to have flexible height and width of the view.Please tell how to do this?
我希望高度和宽度应该以相等的比例增加，它必须在所有设备上看起来都一样。我想要灵活的高度和宽度的视图。请告诉如何做到这一点？
Here is the image
这是图像
Thanks in Advance
提前致谢
回答by Andrew Luca
Use Size Classes. It helps to have different settings for different devices. http://www.raywenderlich.com/83276/beginning-adaptive-layout-tutorialhttps://youtu.be/IwSTXY0awng?t=2m12s
使用尺寸类。它有助于为不同的设备进行不同的设置。 http://www.raywenderlich.com/83276/beginning-adaptive-layout-tutorial https://youtu.be/IwSTXY0awng?t=2m12s
回答by Mukesh
The most simple way is create a Outlet of your widthand heightconstraint.
最简单的方法是创建一个你width和height约束的出口。
Then dynamically change it in viewDidLoadaccording to phone.
然后viewDidLoad根据手机动态更改。
To check which phone it is u can check the device height like 480for iPhone 4S ,568for iPhone 5,5S and etc
要检查它是哪部手机，您可以检查设备高度，例如480iPhone 4S、568iPhone 5,5S 等
@interface ScoreListViewController (){
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *widthConstraint;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *heightConstraint;
@end
- (void)viewDidLoad {
[super viewDidLoad];
// Set the value according to your requirement
if(4S){
self.heightConstraint.constant=100;
}
}
回答by Nischal Hada
Try to follow the screen shots as below:
尝试按照以下屏幕截图进行操作：
You will get the result as below
你会得到如下结果
回答by deltaaruna
I have written a blog articleabout autolayouting for dynamically changing layouts.
For each screen size you can programmatically add the constraints.
Algorithm
我写了一篇关于动态更改布局的自动布局的博客文章。
对于每个屏幕尺寸，您可以以编程方式添加约束。
算法
- Get the current device size
- Get the required constraints according to the device size
- Then programmatically add the constraints
- 获取当前设备大小
- 根据设备尺寸获取所需约束
- 然后以编程方式添加约束
Changing according to orientation
根据方向变化
- Listen to the UIDeviceOrientationDidChangeNotification notifiation
- Add new constraints according to the notification
- Then call setNeedsUpdateConstraints
For more info and a example code, look at the blog article and thisgithub repo
- 收听 UIDeviceOrientationDidChangeNotification 通知
- 根据通知添加新的约束
- 然后调用 setNeedsUpdateConstraints
有关更多信息和示例代码，请查看博客文章和这个github repo
