I'm totally new to coding and was already very happy to get swipe down functionality into my app.
Now I would like to have a swipe up, so if I drag it down I have a UIView that can have some sort of navigation/option screen (all that code is working perfectly) but I want it the other way around (so you can see that it's down there and then you'd swipe it up). I followed a tutorial online that showed me how to get it like this and after I implemented the first code it's already up there and I tried a couple of things but I don't seem to get it.. here's the code:
class ViewController: UIViewController {
var myview:myView!
override func viewDidLoad() {
super.viewDidLoad()
myview = NSBundle.mainBundle().loadNibNamed("customView", owner: self, options: nil).last as signUpView
myview.frame = CGRectMake(0, -self.view.frame.size.height + 66, self.view.frame.size.width, self.view.frame.size.height)
self.view.addSubview(signup)
myview.setup()
Related
We have found what seems to be a bug in UIKit but wanted to post here to see if anyone else has this problem or found a solution.
We're trying to use the new iOS11 large titles and hoisted search bar/refreshcontrol. We seemed to have found a problem where the root viewController of the navigation stack shows a minor display issue (problem A) but once another viewcontroller is pushed onto the navigation stack, the display goes nuts (problem B):
Things to note:
The problem is worse on the 2nd VC in the stack rather than the 1st
The refreshControl is not the green color the code sets it to the 1st time you see it on each sceen
The refreshControl slides down as you pull to refresh, it shouldn't do this
This odd behavior seems to only be a problem when we programmatically do a "pull to refresh" in viewDidLoad so that the user can see that the data is loading when they enter the screen. If we remove the lines that invoke refreshControl?.beginRefreshing() the display is clean. I've recreated this problem in a sample vanilla app. This is the entirety of the viewcontroller that shows the problem:
import UIKit
class ViewController: UITableViewController {
var tableHeaderSearchController: UISearchController!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.navigationController?.navigationBar.prefersLargeTitles = true
self.navigationController?.navigationItem.largeTitleDisplayMode = .always
tableHeaderSearchController = UISearchController(searchResultsController: UITableViewController())
navigationItem.searchController = tableHeaderSearchController
refreshControl?.tintColor = UIColor.green
refreshControl?.backgroundColor = UIColor.clear
refreshControl?.attributedTitle = NSAttributedString(string: "Loading Stuff...", attributes: [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 17)])
refreshControl?.addTarget(self, action: #selector(refreshPulled), for: .valueChanged)
// Commenting out these 2 lines makes it work fine but you can't see the initial refresh spinner
refreshControl?.beginRefreshing()
refreshPulled()
}
#objc func refreshPulled() {
DispatchQueue.main.asyncAfter(deadline: .now() + 3) { [refreshControl] in
refreshControl?.endRefreshing()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Here's the storyboard. It's just a vanilla tableviewcontroller wrapped in a navigationController. 3 static cells, the 2nd one traverses to another instance of the same controller type.
Any ideas would be greatly appreciated. We'd really like to adopt the new look but this stuff is making it very hard to do so.
First, it is absolutely crucial that the table view extend up underneath the navigation bar and that is iOS 11 offset behavior be correct:
self.edgesForExtendedLayout = .all
self.tableView.contentInsetAdjustmentBehavior = .always
Second, scrolling to show the refresh control when you refresh manually is up to you, and calculating the amount is not at all simple:
self.refreshControl!.sizeToFit()
let top = self.tableView.adjustedContentInset.top
let y = self.refreshControl!.frame.maxY + top
self.tableView.setContentOffset(CGPoint(0, -y), animated:true)
self.refreshControl!.beginRefreshing()
The bar still stays too big during the refresh, but I don't see what can be done about that. Basically Apple has implemented large titles and shown the refresh control in the nav bar without thinking through the effects or dealing with the resulting bugs.
Hi am developing app using swift in my app I want use toast message and toast activity so i followed the link: https://github.com/scalessec/Toast-Swift. I am able to use in view controller method it works well but I can't use in app delegate methods.
My code in my app delegate:
func loadJsonData(){
self.view.makeToastActivity(.center)
}
The above mentioned code does not work because app delegate has no member view...please help me to use that in my app delegate.
AppDelegate is for handling things like initialising the app, closing the app, notifications, etc.
What you want to do is:
Go to the storyboard (named Main.storyboard)
Add a ViewController to the storyboard (drag it from the bottom right)
Create a Swift file and call it FirstView, for example, and add the following code
FirstView.swift
import UIKit
class FirstView: UIViewController
{
override func viewDidLoad()
{
self.view.makeToastActivity(.center);
}
}
Go back to the storyboard
Click on the ViewController that you just created
Look at the top right of the screen and there will be six little icons. Click the one third from the left and type FirstView in the first field named "Class" (see attached picture).
Note: make sure you save your FirstView.swift file or this won't work.
How about a customized Toast instead? One that is far more alluring, suits your need and requires no libraries or complex implications?
Now let us try the following bit of code
func sailAwayLabelAction(){
// here creating a rectangle with certain dimensions you can easily manipulate
let rect = CGRect(origin: CGPoint(x: self.view.frame.size.width/2 - 150,y :self.view.frame.size.height-100), size: CGSize(width: 300, height: 35))
//here creating and manipulating the attributes of your text, i.e color,alignment etc..
let toastLabel = UILabel(frame: rect)
toastLabel.backgroundColor = UIColor.orange
toastLabel.textColor = UIColor.white
toastLabel.textAlignment = NSTextAlignment.center;
toastLabel.text = "This is my customized Toast !"
toastLabel.layer.cornerRadius = 10;
toastLabel.clipsToBounds = true
//first pop the toast into our view
self.view.addSubview(toastLabel)
//then after 1 sec + 1 sec delay, animate the entire toastLabel out.
UIView.animate(withDuration: 1, delay: 1, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {
toastLabel.alpha = 0.0
})
}
Whenever you activate the previous function, it should render something similar to this,
try this please, through this you can get top controller of your app and then you can add toast on top controller
let win:UIWindow = UIApplication.shared.delegate!.window!!
win.currentViewController()?.view
How do you implement functions like viewDidLoad() in an empty project without a storyboard?
Sorry for the beginner question. I have been searching for hours now but it still doesn't work.
Thanks for any help!
edit:
I am using a .xib file, just no .storyboard. At the moment I'm setting everything up inside applicationDidFinishLaunching()
edit2:
I think I finally got it:
I created a new project without a storyboard, created a file ViewController.swift together with an ViewController.xib and added
window?.contentViewController = ViewController()
into the applicationDidFinishLaunching function inside the AppDelegate.
I cannot believe I didn't get this sooner.
Sorry BaseZen for your wasted time and thank you very much for trying to help me!
The question is (far) too broad. Please make it more specific, perhaps tailoring it to the part of it that is answered here, just for the sake of others in the future.
There are in-code equivalents to all Storyboard techniques. Your google technique is:
MacOS Swift how to doXyz programmatically
By the way, iOS is probably 10x more popular in terms of search results. So if the platform doesn't matter and you just want to learn how to do it in code, start with iOS.
This will get you started with layout: https://www.hackingwithswift.com/read/6/3/auto-layout-in-code-addconstraints
For example, initializing a non-IBOutlet:
var myButton = NSButton()
Setting its text:
myButton.title = "Hello"
Adding it to a View Controller's view:
view.addSubview(myButton)
Constraining it within the view:
// You have to learn some verbose weird stuff to do this in code
myButton.translatesAutoresizingMaskIntoConstraints = false
view.addConstraint(NSLayoutConstraint( ... ))
Connecting it to a non-IBAction handler, assuming you have a function called func handleAction(sender: AnyObject)
myButton.target = self
myButton.action = #selector(MyViewController.handleAction(_:))
Simplest possible example:
import Cocoa
class ViewController: NSViewController {
var b = NSButton()
override func viewDidLoad() {
super.viewDidLoad()
b.title = "Hi! I am a button"
b.target = self
b.frame = NSRect(x: 100, y: 100, width: 100, height: 25)
b.action = #selector(ViewController.handleButtonPress(_:))
view.addSubview(b)
}
func handleButtonPress(sender: NSButton) {
b.title = "Thank you for clicking."
b.sizeToFit()
}
}
I have a very very simple project set up that allows you to click a "browse photo" button. The user then selects a photo from their photo gallery, and it's displayed on a programmatically created UIImageView.
Works like a charm. However - I am missing key functionality that is required.
I need the user to be able to scale the image (via pinching and dragging) after it is displayed within the UIImageView. allowsEditing = true, lets the user crop before. I need similar functionality, however, allowing them to edit once it's on the main UI.
Help is appreciated. Please and thank you!!
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var imageView: UIImageView!
var imageViewLayer: CALayer{
return imageView.layer
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
imageViewLayer.contents = UIImage(named: "ss3.jpg")?.CGImage
imageViewLayer.contentsGravity = kCAGravityResizeAspect
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func newGesture(sender: AnyObject) {
imageViewLayer.transform = CATransform3DMakeScale(sender.scale, sender.scale, 1)
}
}
I did something similar a while back. I added the image to UIImageView's layer property, added gesture recognizer to the view and implemented the gesture call backs modifying the layer property and not the view. Adding the image to the UIImageView's layer did the trick. As a side note, I would like to add that every UIView is supported by CALayer class. It has a lot of methods and properties which help to dynamically change the view, which in your case will be done by gestures.
As an alternative, you can also use CALayer's hitTest method instead of implementing the call backs for gesture recognizers.
EDIT- Sample Code
You could do some thing like this:
#IBOutlet weak var imageView: UIImageView!
var imageViewLayer: CALayer{
return imageView.layer
}
In the viewDidLoad, set up the image
imageViewLayer.contents = UIImage(named: "CoreDataDemoApp")?.CGImage
imageViewLayer.contentsGravity = kCAGravityResizeAspect
Add pinch gesture to the imageview in storyboard (or programmatically) and in it's call back you could do something like this:
#IBAction func pinchGestureRecognized(sender: AnyObject) {
imageViewLayer.transform = CATransform3DMakeScale(sender.scale, sender.scale, 1)
}
Again this is just to give you an idea of how it could work and it is not the complete code. Hope this helps!
This is another way of doing it:
Stackoverflow link to related question
i am trying to implement an iMessage style keyboard input with a textview that sits at the bottom of the screen then slides up with the keyboard when you touch the textView, then is docked to the top of the keyboard.
I found MessageComposerView which is exactly what I want. Unfortunately I cannot get it working ( I am using swift).
below is my code:
import UIKit
class CommentsViewController: UIViewController, MessageComposerViewDelegate {
var messageComposerView: MessageComposerView!
override func viewDidLoad() {
super.viewDidLoad()
let defaultWidth = view.frame.size.width
let defaultHeight = CGFloat(54.0)
let subviewFrame = CGRect(x: 0, y: view.frame.height - defaultHeight, width: defaultWidth, height: defaultHeight)
messageComposerView = MessageComposerView(frame: subviewFrame) as MessageComposerView
view.addSubview(messageComposerView)
}
func messageComposerSendMessageClickedWithMessage(message: String!) {
}
}
however it does not show up. Ive printed the view and its frame is correct, its just that there is nothing there for some reason. Everything looks like it should be working. Does anyone see anything wrong with my current implementation?
Try PHFComposeBarView Library (https://github.com/fphilipe/PHFComposeBarView), it's a exact copy of the iMessage composer bar that can be used in C & Swift from storyboard or code
Code Example : https://github.com/liveminds/SwiftPHFComposeBarTest
Storyboard Example : https://github.com/liveminds/SwiftPHFComposeBarTest/tree/storyboard-managed
To add the bar to your view:
drag a new UIView on your UIViewcontroller, assign "PHFComposeBarView" class to UIView
Add an outlet of the UIView to your Viewcontroller's class
add "PHFComposeBarViewDelegate" to your Viewcontroller's class
assign UIView Delegate in viewdidload() : self.composerBarOutlet.delegate = self
Set the composer bar to appear as inputAccessoryView above the keyboard:
override var inputAccessoryView: UIView {
composerBar.removeFromSuperview()
return composerBar
}
Style your Bar(example):
composerBar.utilityButtonImage = UIImage(named: "fullStar")!
composerBar.buttonTitle = "Submit"
composerBar.maxCharCount = 200
composerBar.maxLinesCount = 5
composerBar.alpha = 1.0
composerBar.buttonTintColor = AppConfig.BLUECOLOR
composerBar.placeholder = "What do you think about this product?"
Try following this example by Andrew Bancroft Send Text Message In-App – Using MFMessageComposeViewController with Swift. His example provides a nice walkthrough using Swift and includes sample code on GitHub.
Just going from the code snippet included in your post, it looks like you need to import Foundation, import MessageUI, conform to the MFMessageComposeViewControllerDelegate protocol, and implement the messageComposeViewController protocol method. All of this is covered in Andrew's blog post. This should give you what you're looking for.
Have you find the answer yet?
I use the same Framework however I believe you need to set up the delegate to self. IN my case it fails though I dont know why but it is written down in the readme github.