I have a text view and I am attempting to add a line underneath it. I am trying to accomplish this with a CALayer, however it is not showing up in the textView. I would appreciate it if someone could help me. The code is below.
let border = CALayer()
border.backgroundColor = UIColor(hexString: "#CC0000").cgColor
border.frame = CGRect(x: 0, y: messageField.frame.height - 3, width: messageField.frame.width, height: 3)
messageField.layer.addSublayer(border)
In my test app, I just tried this:
let messageField = UITextView(frame: CGRect(x: 30, y: 40, width: view.frame.width - 60, height: 40))
var border = CALayer()
border.backgroundColor = UIColor.red.cgColor
border.frame = CGRect(x: 0, y: messageField.frame.height - 3, width: messageField.frame.width, height: 3)
messageField.layer.addSublayer(border)
view.addSubview(messageField)
And it worked fine. Weird but fine. The color showed up no problem, but it scrolls along with the text view. But that might be what you want. I tried it with different heights for the message field too. I couldn't get it to not show.
If you want it to work and have the line not scroll with the text, try this answer: https://stackoverflow.com/a/38327895/793607
Related
I'm creating a subview to add onto an existing view. I'm trying to assign the background color to this subview to red programmatically but displays as the defaulted color still.
let toggleView = UIView(frame: CGRect(x: 0, y: 0, width: screenWidth, height: screenHeight))
toggleView.backgroundColor = UIColor.red
As from the above code snippet it looks like that you are creating a view but not adding it as a subview to the parent view. It will be best if you can provide full function so that we can look into the actual cause.
You have created the toggleView with a red background but you have not added it to the main view, this is what you should do:
let screenWidth = view.frame.size.width
let screenHeight = view.frame.size.height
let toggleView = UIView(frame: CGRect(x: 0, y: 0, width: screenWidth, height: screenHeight))
toggleView.backgroundColor = UIColor.red
view.addSubview(toggleView)
In my Swift app i have inserted an image like this:
let ImageNavig = "5.jpg"
let image1 = UIImage(named: ImageNavig)
let image1View = UIImageView(image: image1!)
let yCenter1 = self.view.center.y
let Image1Size = CGPoint(x: 420, y: 240)
image1View.frame = CGRect(x: 0, y: -10, width: Image1Size.x, height: Image1Size.y)
view.addSubview(image1View)
but, when I run the project with older Iphone the results is this:
how can I insert autolayout programmatically without storyboard?
If you have issue of image width in old iphones then it is because, you have given fix width to the image , use below code it will take width dynamically as per iphone width
let Image1Size = CGPoint(x: self.view.frame.width, y: 240)
instead of
let Image1Size = CGPoint(x: 420, y: 240)
I am trying to add a UIImage to the UICollectionViewController by using the following code:
let backgroundImage = UIImageView(frame: CGRect(x: 0, y: 0, width: 430, height: 550))
backgroundImage.image = UIImage(named: "fantasy_football_hero_tile_cropped.png")
backgroundImage.contentMode = UIView.ContentMode.scaleAspectFit
backgroundImage.clipsToBounds = true
self.view.insertSubview(backgroundImage, at: 0)
My issue is that the image is not at the bottom/lowest part of the screen which is what I am trying to achieve... how can I clip it to the bottom?! I am not using story board, can I programmatically anchor the image to the bottom as I could do in a storyboard?
This is especially true since the screen sizes for the phones are different, but the desire is still to have it anchored to the bottom.
you can add programatically. I think you add/insert some views to the self.view that will also affect simple scenario
let backgroundImageV = UIView(frame: CGRect(x: 0, y: 0, width: 430, height: 500))
backgroundImageV.backgroundColor = UIColor.blue
backgroundImageV.contentMode = UIView.ContentMode.scaleAspectFit
backgroundImageV.clipsToBounds = true
self.view.addSubview(backgroundImageV)
let backgroundImageV2 = UIView(frame: CGRect(x: 0, y: 0, width: 430, height: 510))
backgroundImageV2.backgroundColor = UIColor.green
backgroundImageV2.contentMode = UIView.ContentMode.scaleAspectFit
backgroundImageV2.clipsToBounds = true
self.view.insertSubview(backgroundImageV2, at: 0)
let backgroundImage = UIImageView(frame: CGRect(x: 0, y: 0, width: 430, height: 550))
backgroundImage.backgroundColor = UIColor.red
backgroundImage.contentMode = UIView.ContentMode.scaleAspectFit
backgroundImage.clipsToBounds = true
self.view.insertSubview(backgroundImage, at: 0)
Here Red will be bottom Green will be in 1. because you add that red colored view later. So It will work. Can you please show your full code. It will work
One problem here is that self.view for a UICollectionViewController is the UICollectionView. This is a scroll view, so no matter where you put this image view, it is going to move when the scroll view scrolls.
If that isn't what you want, there is a simple solution: set the image view as the collection view's backgroundView. That is a stationary view that forms the background to the collection view no matter how it is scrolled. If you set the image view's contentMode to bottom the image will be centered at the bottom, which seems to be what you are after.
Could someone explain me the difference between these two pictures please?
Code with preview of the UIView:
Code without the preview of the UIView:
What's the difference? And why can't I get a preview on the second code example? It only shows "empty image"....
Thanks for helping me.
This seems to be a "feature" (bug) of a Swift playground. If you don't create the view instance using a non-zero frame width and height, you will get "empty image".
This works:
let rect = UIView(frame: CGRect(x: 0, y: 0, width: 1, height: 1))
rect.frame = CGRect(x: 0, y: 0, width: 200, height: 200)
rect.backgroundColor = .green
But this doesn't:
let rect = UIView(frame: .zero)
// also bad: let rect = UIView(frame: CGRect(x: 0, y: 0, width: 1, height: 0))
rect.frame = CGRect(x: 0, y: 0, width: 200, height: 200)
rect.backgroundColor = .green
And remember that:
let rect = UIView()
is essentially the same as doing:
let rect = UIView(frame: .zero)
So when using a playground, create a view with a non-zero frame width and height in the initializer if you don't want to see "empty image".
I am trying to add a single blank UIView to multiple UITextField in order to give a little padding. But my app freeze (does not crash). Can anyone tell me what the issue might be? Here is my code.
var paddingView = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 50))
It works well when I assign this view to single UITextField
emailTextField.leftView = paddingView
emailTextField.leftViewMode = UITextFieldViewMode.Always
But App does not responds if I add same paddingView to another UITextField e.g
someTextField.leftView = paddingView
someTextField.leftViewMode = UITextFieldViewMode.Always
My Environment is xCode 6.4, Swift 2.0.
So, I was having and issue with the same exact problem. My solution was to create a paddingView for each textfield.
var paddingView = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 50))
var paddingView2 = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: 50))
emailTextField.leftView = paddingView
emailTextField.leftViewMode = UITextFieldViewMode.Always
someTextField.leftView = paddingView2
someTextField.leftViewMode = UITextFieldViewMode.Always