ios 使用代码更改uiview背景颜色
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change the uiview background color with code
提问by Rafael
I would like to change the background color of my app programmatically, not IB. Is it possible to get both a Swift and Obj-C answer.
我想以编程方式更改我的应用程序的背景颜色，而不是 IB。是否有可能同时获得 Swift 和 Obj-C 答案。
回答by Jamie
You can set the backgroundColorproperty of whatever view it is you have on screen.
您可以设置backgroundColor屏幕上任何视图的属性。
In Objective-C:
在 Objective-C 中：
self.view.backgroundColor = [UIColor redColor];
In Swift:
在斯威夫特：
self.view.backgroundColor = .red
or if it's the main window you're after,
或者如果它是你所追求的主窗口，
In Objective-C:
在 Objective-C 中：
self.window.backgroundColor = [UIColor redColor];
In Swift:
在斯威夫特：
self.window.backgroundColor = .red
回答by user2165491
self.view.backgroundColor = [UIColor redColor];
possible colors are :
可能的颜色是：
blackColor
darkGrayColor
lightGrayColor
whiteColor
grayColor
redColor
greenColor
blueColor
cyanColor
yellowColor
magentaColor
orangeColor
purpleColor
brownColor
clearColor
回答by Semih Sezer
For Swift 3, you should do:
对于 Swift 3，你应该这样做：
self.view.backgroundColor = UIColor.white
Unfortunately, the other answers no longer work in Swift 3.
不幸的是，其他答案在 Swift 3 中不再适用。
回答by Gustavo Chavez
If you want to change the background color of the view with code in Swift, you should do instead:
如果你想用 Swift 中的代码改变视图的背景颜色，你应该这样做：
self.view.backgroundColor = UIColor.redColor();
回答by Vikas Rajput
You can use RGB Color by following code:
您可以通过以下代码使用 RGB 颜色：
UIColor *myColor = [UIColor colorWithRed:(128.0 / 255.0) green:(90.0 / 255.0)
blue:(200.0 / 255.0) alpha: 1];
self.view.backgroundcolor = mycolor;
回答by Basir Alam
For swift based project you can simply type the following and press enter:
对于基于 swift 的项目，您只需键入以下内容并按 Enter：
self.view.backgroundColor = Color Literal
Here the ColorLiteral property will give you a default white colour which you can change by double clicking on that colour.
这里的 ColorLiteral 属性将为您提供默认的白色，您可以通过双击该颜色进行更改。
You can choose from a list of colour from this popup:
您可以从此弹出窗口的颜色列表中进行选择：
