Im using this library for my project - https://github.com/filletofish/CardsLayout
and I tried to change the size of the items in CardsCollectionViewLayout.swift but it does not work.. it still stays the same.
I've also tried to make the changes by forking the library (as desribed by Technerd here: Editing locked files from a CocoaPods framework)
but this does not work either.
Is there any other way of being able to make changes to Pods? Or am I simply doing something wrong in these two previous ways
Edit:
#IBOutlet var collectionView: UICollectionView!
let cardLayout = CardsCollectionViewLayout()
override func viewDidLoad() {
super.viewDidLoad()
collectionView.collectionViewLayout = CardsCollectionViewLayout()
collectionView.dataSource = self
collectionView.delegate = self
collectionView.isPagingEnabled = true
collectionView.showsHorizontalScrollIndicator = false
collectionView.isHidden = true
// cardLayout.itemSize = CGSize(width: 50, height: 50)
collectionView.collectionViewLayout = cardLayout
searchInput.delegate = self
}
You should show the code you wrote to setup your layout. This would make it easier to help you.
Put the code related to collectionView in the didSet block of your collectionView property.
The following code snippet should work for you:
#IBOutlet weak var collectionView: UICollectionView! {
didSet {
let cardLayout = CardsCollectionViewLayout()
cardLayout.itemSize = CGSize(width: 50, height: 50)
collectionView.collectionViewLayout = cardLayout
collectionView.dataSource = self
collectionView.delegate = self
collectionView.isPagingEnabled = true
collectionView.showsHorizontalScrollIndicator = false
collectionView.isHidden = true
}
}
Do never change a file in a pod! Your changes would be lost when updating the pod!
If you ever need to change the behavior of a pod, you have options:
write an extension, if that suits your needs
use subclassing
if you need to make bigger changes, use a fork as you already tried
or you may add the pods source files to your projects code base. But I wouldn't recommend this, because that would make it difficult to profit from updates published to the pods source.
Related
(Swift, macOS, storyboard)
I have an NSView in a transparent window
I have this in the viewDidLoad. To make the window transparent and the NSView blue:
DispatchQueue.main.asyncAfter(deadline: .now() + 0.2){
self.view.window?.isOpaque = false
self.view.window?.backgroundColor = NSColor.clear
}
view1.wantsLayer = true
view1.layer?.backgroundColor = NSColor.green.cgColor
I want to change the width with code when I click a button.
If it has constraints:
#IBAction func button1(_ sender: NSButton) {
view1Width.constant = 74
}
I tried without constraints and different ways to change the width. They all give the same results:
view1.frame = NSRect(x:50, y:120, width:74, height:100)
But there is still a border and a shadow where the old shape was. Why does it happen and how to solve it?
It only happens in specific circumstances:
If the window is transparent (and macOS)
I change the width and do not change the position y
The window must be active. If it is not (If I click to anywhere else) it looks as it should: the shadow around the changed NSView green.
(I have simplified the case to try to find a solution. I have created a new document and there is only this code and I am sure there is no other element)
Since the window is transparent you need to invalidate the shadows.
Apple states about invalidateShadow()
Invalidates the window shadow so that it is recomputed based on the current window shape.
Complete Self-Contained Test Program
It sets up the UI pogrammatically instead of using a storyboard. Other than that, the code is very close to your example.
Note the line:
view.window?.invalidateShadow()
in the onChange method.
import Cocoa
class ViewController: NSViewController {
private let view1 = NSView()
private let changeButton = NSButton()
private var view1Width: NSLayoutConstraint?
override func viewDidLoad() {
super.viewDidLoad()
setupUI()
DispatchQueue.main.asyncAfter(deadline: .now() + 0.2){
self.view.window?.isOpaque = false
self.view.window?.backgroundColor = NSColor.clear
}
view1.wantsLayer = true
view1.layer?.backgroundColor = NSColor.green.cgColor
}
#objc private func onChange() {
view1Width?.constant += 32
view.window?.invalidateShadow()
}
private func setupUI() {
changeButton.title = "change"
changeButton.bezelStyle = .rounded
changeButton.setButtonType(.momentaryPushIn)
changeButton.target = self
changeButton.action = #selector(onChange)
self.view.addSubview(view1)
self.view.addSubview(changeButton)
self.view1.translatesAutoresizingMaskIntoConstraints = false
self.changeButton.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
view1.centerXAnchor.constraint(equalTo: view.centerXAnchor),
view1.centerYAnchor.constraint(equalTo: view.centerYAnchor),
view1.heightAnchor.constraint(equalToConstant: 128),
changeButton.topAnchor.constraint(equalTo: view1.bottomAnchor, constant:16),
changeButton.centerXAnchor.constraint(equalTo: view1.centerXAnchor)
])
view1Width = view1.widthAnchor.constraint(equalToConstant: 128)
view1Width?.isActive = true
}
}
Result
The desired result with an update of the shadows is accomplished:
At a full clear new swift project from "Single View App" template.
When I ensure SnapKit can be import correctly.
I just play very simple code to show a Rectangle:
let test = UIView()
test.backgroundColor = UIColor.green
test.frame.size = CGSize(width: 500, height: 300)
self.view.addSubview(test)
test.snp.makeConstraints { (maker) in
// maker.top.equalTo(30)
// maker.centerX.equalTo(self.view)
// maker.height.equalTo(100)
}
put this code into func viewDidLoad of "UIViewController.swift" .
from now, SnapKit things is commented, and it's work FINE! like picture showing:
work fine snap(use frame.size)
But when I uncomment SnapKit things, it's display Nothing! like this:
work bad snap(use SnapKit)
So,Please help me find the trouble,thank you!
You don't need to set frame size, if you using constraints.
This how your code should look like:
let test = UIView()
test.backgroundColor = UIColor.green
self.view.addSubview(test)
test.snp.makeConstraints { (make) in
make.top.equalTo(30)
make.centerX.equalToSuperview()
make.height.equalTo(300)
make.width.equalTo(500)
}
The code below has a uicolor box when pressed, the box becomes a smaller uicolor box. The problem is that the color box can only be pressed one time. So the box can go from large to small but it cant go from small to big. How can the code be written so when the box is clicked the box goes from big to small or small to big every time.
import UIKit
class ViewController: UIViewController {
let colorview = UIView()
var initialc = [NSLayoutConstraint]()
override func viewDidLoad() {
super.viewDidLoad()
let tapGestureRecognizer = UITapGestureRecognizer(target:self, action:#selector(ViewController.myFunction(_:)))
colorview.userInteractionEnabled = true
colorview.addGestureRecognizer(tapGestureRecognizer)
colorview.translatesAutoresizingMaskIntoConstraints = false
colorview.backgroundColor = UIColor.blueColor()
self.view.addSubview((colorview))
let leadingc = colorview.leadingAnchor.constraintEqualToAnchor(self.view.leadingAnchor)
let trailingC = colorview.trailingAnchor.constraintEqualToAnchor(self.view.trailingAnchor)
let topc = colorview.topAnchor.constraintEqualToAnchor(self.view.topAnchor)
let bottomc = colorview.bottomAnchor.constraintEqualToAnchor(self.view.bottomAnchor, constant: -50)
initialc.appendContentsOf([leadingc,trailingC,topc,bottomc])
NSLayoutConstraint.activateConstraints(initialc)
}
func myFunction(sender: AnyObject) {
NSLayoutConstraint.deactivateConstraints(initialc)
let widthc = colorview.widthAnchor.constraintEqualToConstant(100)
let heightc = colorview.heightAnchor.constraintEqualToConstant(100)
let centerxc = colorview.centerXAnchor.constraintEqualToAnchor(self.view.centerXAnchor)
let centeryc = colorview.centerYAnchor.constraintEqualToAnchor(self.view.centerYAnchor)
NSLayoutConstraint.activateConstraints([widthc,heightc,centerxc,centeryc])
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
You are resizing the view in an awkward way. Instead of using constraints, don't place them. Tell the view where to go with its frame. If you need the view to animate the change between frames then use UIView.animateViewWithDuration() and inside the function do the frame changes you desire. This keeps transitions smooth and full control in your hands. Constraints are not as easy to implement properly during run time as frames.
I have found this answer How to check text field input at real time?
This is what I am looking for. However I am having trouble actually implementing this code. Also my current geographical location makes googling almost impossible.
I want to be able to change the background color of the next text field if the correct number is entered into the previous text field. textfieldTwo background color will change to green if the correct value is entered in textFieldOne. If the value is incorrect then nothing will happen. Please help me out. I have two text fields called textFieldOne and textFieldTwo and nothing else in the code.
Just pop this in your main view controller in an empty project (try using iphone 6 on the simulator)
import UIKit
class ViewController: UIViewController {
var txtField:UITextField!
var txtFieldTwo:UITextField!
var rightNumber = 10
override func viewDidLoad() {
super.viewDidLoad()
//txtFieldOne
var txtField = UITextField()
txtField.frame = CGRectMake(100, 100, 200, 40)
txtField.borderStyle = UITextBorderStyle.None
txtField.backgroundColor = UIColor.blueColor()
txtField.layer.cornerRadius = 5
self.view.addSubview(txtField)
//txtFieldTwo
var txtFieldTwo = UITextField()
txtFieldTwo.frame = CGRectMake(100, 150, 200, 40)
txtFieldTwo.borderStyle = UITextBorderStyle.None
txtFieldTwo.backgroundColor = UIColor.blueColor()
txtFieldTwo.layer.cornerRadius = 5
self.view.addSubview(txtFieldTwo)
txtField.addTarget(self, action: "checkForRightNumber", forControlEvents: UIControlEvents.AllEditingEvents)
self.txtField = txtField
self.txtFieldTwo = txtFieldTwo
}
func checkForRightNumber() {
let number:Int? = self.txtField.text.toInt()
if number == rightNumber {
self.txtFieldTwo.backgroundColor = UIColor.greenColor()
} else {
self.txtFieldTwo.backgroundColor = UIColor.blueColor()
}
}
}
EDIT: Adding a version with IBOutlets and IBActions
Note that in this example the IBAction is connected to txtFieldOne on Sent Events / Editing Changed
Also, make sure your Text Fields border colors are set to None. In the storyboard, the way to do this is to choose the left most option with the dashed border around it. That's so you can color the backgrounds. You can use layer.cornerRadius to set the roundness of the border's edges.
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var txtField: UITextField!
#IBOutlet weak var txtFieldTwo: UITextField!
var rightNumber = 10
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func checkForRightNumber(sender: AnyObject) {
let number:Int? = self.txtField.text.toInt()
if number == rightNumber {
self.txtFieldTwo.backgroundColor = UIColor.greenColor()
} else {
self.txtFieldTwo.backgroundColor = UIColor.blueColor()
}
}
}
How can you programmatically make sure that the cursor of a tableView-HeaderView-TextField gets active (i.e. is the first responder) ??
My table looks like this (i.e with the custom TextField header). So far, the cursor only gets inside the grey header field by clicking inside the textfield. But I would like to be able to get the cursor inside the textfield programmatically....
The code for my custom tableview-header looks like this :
// drawing a custom Header-View with a TextField on top of the tableView
func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let container = UIView(frame: CGRectMake(0, 0, self.view.frame.size.width, 50))
let textField = UITextField(frame: CGRectMake(10, 15, self.view.frame.size.width/2 - 40, 45))
textField.delegate = self
self.txtfield = textField
textField.textColor = UIColor.blackColor()
let placeholder = NSAttributedString(string: "..add player", attributes: [NSForegroundColorAttributeName: UIColor.darkGrayColor()])
textField.attributedPlaceholder = placeholder
textField.backgroundColor = UIColor.lightGrayColor()
container.addSubview(textField)
var headPlusBttn:UIButton = UIButton.buttonWithType(UIButtonType.ContactAdd) as! UIButton
headPlusBttn.center.x = self.view.frame.size.width - 20
headPlusBttn.center.y = 38
headPlusBttn.enabled = true
headPlusBttn.addTarget(self, action: "addTeam:", forControlEvents: UIControlEvents.TouchUpInside)
container.addSubview(headPlusBttn)
return container
}
My first approach was to set the first-responder of the headerViewForSection like this (see code):
// reload entries
func reloadEntries() {
self.tableView.reloadData()
// the following does unfortunately not work !!!!!
self.tableView.headerViewForSection(1)?.becomeFirstResponder()
}
Not sure why this does not work. Maybe, the Section-Nr (Int=1) is wrong. But I tried several section-numbers. No curser where it should be.
Any help appreciated !
Usually adding a delay helps in situations like this. It allows the OS to do everything it wants with the view, and then it won't mess up what you're trying to do at the same time.
Maybe something like this:
func reloadEntries() {
self.tableView.reloadData()
let delay = (Int64(NSEC_PER_SEC) * 0.1)
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, triggerTime), dispatch_get_main_queue(), { () -> Void in
self.tableView.headerViewForSection(1)?.becomeFirstResponder()
})
}
I haven't tested this to do what you want, so you may need to find a different place to put this.
Also, are you sure you want to affect the view in section 1? From your image it looks like you want to mess with the header in section 0.
Be sure to drop into the debugger and check that the header isn't nil. Your code implies that that's a valid condition. You might try writing it like this (at least for testing):
if let header = self.tableView.headerViewForSection(1) {
header.becomeFirstResponder()
}
else {
print("There is no header.")
}
Try
self.tableView.headerViewForSection(1)?.textfield.becomeFirstResponder()