How can generate the flexbox layout with button please check the attach image. Any library available? Or can make with collectionView.
Yes you should use a collection view, and implement this delegate function
func collectionView(_ collectionView: UICollectionView,
layout collectionViewLayout: UICollectionViewLayout,
sizeForItemAt indexPath: IndexPath) -> CGSize {
var str: String = data[indexPath.row]
let font: UIFont = /*Your Font*/
let size: CGSize = str.size(withAttributes: [NSAttributedString.Key.font: font])
return CGSize(width: size.width + 39, height: 45)
Related
I am just trying to dynamically size cells. I followed a few SO Questions and cannot seem to produce the same results.
Example one
Example two
My code right now is:
extension ItemViewController: UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let text = allTags[indexPath.item]
tagName.text = text //label from my custom cell (xCode not recognizing)
return CGRect(width: tagName.intrinsicContentSize.width + 60, height: 40)
}
}
In the second line, tagName is not identified by Xcode. It is part of my custom cell class. The first SO question I linked somehow was able to identify their cell properties within sizeForItemAt. How would I do that to dynamically size my cells? I do have estimated size to non-nil:
if let collectionViewLayout = collectionView.collectionViewLayout as? UICollectionViewFlowLayout {
collectionViewLayout.estimatedItemSize = UICollectionViewFlowLayout.automaticSize
}
My desired result in similar to the photos. Let me know if you need more info. Thank you.
Try with This Way.
it's working fine for me in Swift5.
First Implement Collectionview FlowLayout Delegate
extension ItemViewController: UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let text = "Your Lable Text"
let font: UIFont = UIFont(name: "Font Name", size: 20) ?? UIFont.systemFont(ofSize: 17.0) // set here font name and font size
let width = text.SizeOf(font).width
return CGSize(width: width + 20.0 , height: 40.0) // ADD width + space between text (for ex : 20.0)
}
}
Add One String Extension.
extension String {
func SizeOf(_ font: UIFont) -> CGSize {
return self.size(withAttributes: [NSAttributedString.Key.font: font])
}
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = UILabel.textWidth(font: UIFont(name: "pass same font name used in label", size: 12.0) ?? UIFont.systemFont(ofSize:
12.0), text: dataArray(indexPath.item))
return CGSize(width: width + 20, height: 50)
}
extension UILabel {
class func textWidth(font: UIFont, text: String) -> CGFloat {
let myText = text as NSString
let rect = CGSize(width: CGFloat.greatestFiniteMagnitude, height: CGFloat.greatestFiniteMagnitude)
let labelSize = myText.boundingRect(with: rect, options: .usesLineFragmentOrigin, attributes: [NSAttributedString.Key.font: font], context: nil)
return ceil(labelSize.width)
}
}
I created a UICollectionViewCell xib and would like the cell to adjust automatically according to the length of the label text like the picture shown below.
The picture shows what I made on a prototype cell. But no matter how I tried, the cell just kept the same size when I used a xib instead.
implement this delegate UICollectionViewDelegateFlowLayout
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let market = self.markets[indexPath.row]
let label = UILabel(frame: CGRect.zero)
label.text = market
label.sizeToFit()
return CGSize(width: label.frame.width, height: 25)
}
or
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let text = NSAttributedString(string: markets[indexPath.row])
return CGSize(width: text.size().width, height: 25)
}
You can also just implement this in sizeForItemAt
just insert 'yourString' and 'yourFont':
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = yourString.size(withAttributes: [NSAttributedString.Key.font: yourFont]).width
return CGSize(width: width, height: 20)
}
you might need to add some space to the width because of the corner radius of the cell
It works fine if I don't give trailing properties.
However, if the text is long, it will be cut off the screen.
So I set trailing.
But, this will break the width of the UICollectionViewCell.
This is my code
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = collectionView.frame.width
return CGSize(width: width / 2, height: 53)
}
Why is that? Please help me.
Simplest method is just set label lines as 0
#oddK - Don't set the width as collection width / 2, instead set the width based on the text content,
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = collectionView.frame.width
let lblWidth = "My text".getWidth(withConstrainedHeight: CGFloat(53), font: UIFont.systemFont(ofSize: 14))
return CGSize(width: lblWidth, height: 53)
}
//Get Width of content in label
func getWidth(withConstrainedHeight:CGFloat, font: UIFont) -> CGFloat {
let viewRect = CGSize(width: .greatestFiniteMagnitude, height: withConstrainedHeight)
let getFrame = self.boundingRect(with: viewRect, options: .usesLineFragmentOrigin, attributes: [NSAttributedString.Key.font : font], context: nil)
return getFrame.size.width
}
I try to implement labels with UICollectionView. But I have to set the widths with dynamic labels length. I try to remove gaps in picture. I share some code. I use Nibs.
Thanks in advance.
layoutFCV.estimatedItemSize = UICollectionViewFlowLayout.automaticSize
let filterCV = UICollectionView(frame: self.view.bounds, collectionViewLayout: layoutFCV)
--
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
if collectionView == filterCollectionView {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "FilterSelectionCollectionViewCell", for: indexPath) as! FilterSelectionCollectionViewCell
return CGSize(width: cell.title.frame.width , height: self.filterCollectionView.frame.height)
} else {
return CGSize(width: 10, height: 10)
}
}
Use this code:
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let text = "Title"
let width = self.estimatedFrame(text: text, font: UIFont.systemFont(ofSize: 14)).width
return CGSize(width: width, height: 50.0)
}
func estimatedFrame(text: String, font: UIFont) -> CGRect {
let size = CGSize(width: 200, height: 1000) // temporary size
let options = NSStringDrawingOptions.usesFontLeading.union(.usesLineFragmentOrigin)
return NSString(string: text).boundingRect(with: size,
options: options,
attributes: [NSFontAttributeName: font],
context: nil)
}
extension ViewController: UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return "String".size(withAttributes: [
NSAttributedString.Key.font : UIFont.boldSystemFont(ofSize: 14)
])
}
}
First make sure your constraints in UICollectionViewCell.xib file has been set correctly. I mean with the growth of UILabel in cell, the cell itself should grow as well.
You should explicitly set the title before you get the cell size. So here is your collectionView(collectionView:, layout:, sizeForItemAt:) method should be:
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
if collectionView == filterCollectionView {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "FilterSelectionCollectionViewCell", for: indexPath) as! FilterSelectionCollectionViewCell
cell.title.text = "Newest" //this is for the "Newest" cell. Of curse you should set the proper title for each indexPath
cell.setNeedsLayout()
cell.layoutIfNeede()
return CGSize(width: cell.contenView.frame.width , height: cell.contentView.frame.height)
} else {
return CGSize(width: 10, height: 10)
}
}
Right now, i'm facing an issue.
I manage to wrap the cell's content view to its label, but there's some spacing which doesn't fit to the design. There's some spaces available between the cell
Here's my code
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 4
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let hastag = Hastag.fetchHastag()[indexPath.row]
let approximateWidth = view.frame.width - 20
let size = CGSize(width: approximateWidth, height: 28)
let attribute = [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 12)]
let estimatedFrame = NSString(string: hastag.hastag).boundingRect(with: size, options: .usesLineFragmentOrigin, attributes: attribute, context: nil)
return CGSize(width: estimatedFrame.width + 20, height: 26)
}
Below is the result
And this is what i want to achieve, it will be something like this
UPDATE
Here is my full code of collection view data source and delegate. Hastag.hastag is type of string
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return Hastag.fetchHastag().count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "hastagCell", for: indexPath) as! HastagCollectionViewCell
cell.hastag = Hastag.fetchHastag()[indexPath.row]
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 4
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let hastag = Hastag.fetchHastag()[indexPath.row]
let approximateWidth = view.frame.width - 20
let size = CGSize(width: approximateWidth, height: 28)
let attribute = [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 12)]
let estimatedFrame = NSString(string: hastag.hastag).boundingRect(with: size, options: .usesLineFragmentOrigin, attributes: attribute, context: nil)
return CGSize(width: estimatedFrame.width + 16, height: 26)
}
You can use AlignedCollectionViewFlowLayout, its not a library just one file. Just add this file to your project and from your UICollectionView xib just set the flow layout as AlignedCollectionViewFlowLayout. It is very easy to use. Please check the below link.
https://github.com/mischa-hildebrand/AlignedCollectionViewFlowLayout
You can use the size(withAttributes:) function of a NSString to give you the CGSize of a string with a specific font and size.
Assuming that Hastag.hastag is a String I think the following should work:
extension YourViewController: UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let hastag = Hastag.fetchHastag()[indexPath.row]
let title = hastag.hastag as NSString
let titleSize = title.size(withAttributes: [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 12)])
return CGSize(width: titleSize.width + 20, height: 26)
}
}
Note that your ViewController must implement the UICollectionViewDelegateFlowLayout protocol and you must set your ViewController as the delegate for the UICollectionView for this to work.
Hope that helps.
After several try, i finally give up on customizing cell size and instead i'm using the library TagListView