I am trying to add few views to see if the NSScrollView will scroll vertically but it is not doing anything.
private func configure2() {
var yOffset = 0
let scrollView = NSScrollView(frame: NSRect(x: 0, y: 0, width: 400, height: 900))
scrollView.hasVerticalScroller = true
for _ in 1...20 {
let v = NSView(frame: NSRect(x: 0, y: 0 + yOffset, width: 50, height: 20))
v.wantsLayer = true
v.layer?.backgroundColor = NSColor.red.cgColor
scrollView.addSubview(v)
yOffset += 40
}
scrollView.backgroundColor = NSColor.green
self.addSubview(scrollView)
}
I remember in UIKit I can set the contentSize property of UIScrollView but in macOS I cannot set contentSize.
You need to set either the documentView or contentView of your NSScrollView. Then, you'll add your subviews to that view.
private func configure2() {
var yOffset = 0
let scrollView = NSScrollView(frame: NSRect(x: 0, y: 0, width: 400, height: 900))
let documentView = NSView(frame: .zero)
scrollView.hasVerticalScroller = true
for _ in 1...20 {
let v = NSView(frame: NSRect(x: 0, y: 0 + yOffset, width: 50, height: 20))
v.wantsLayer = true
v.layer?.backgroundColor = NSColor.red.cgColor
documentView.addSubview(v)
yOffset += 40
}
print(yOffset)
documentView.frame = .init(x: 0, y: 0, width: 400, height: yOffset)
scrollView.documentView = documentView
scrollView.backgroundColor = NSColor.green
self.addSubview(scrollView)
}
Related
I'm setting header padding for my tableview in iOS older than 15 explicitly. This works for the top first header (section 1 of tableview), but doesn't work for second header (section 2 of tableview). How could I set it for the second also?
Is there something like tableView.tableHeaderView[2] or tableView.tableHeaderView.second ?
In code its the place with commented-out places.
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
if tableView.tag == 2 {
if section == 0 {
if self.tableView(tableView, numberOfRowsInSection: section) > 0 {
let view = UIView()
let imageView = UIImageView(image: UIImage(named: "Logo_face"))
if #unavailable(iOS 15.0) {
imageView.frame = CGRect(x: 10, y: 20, width: 25, height: 25)
} else {
imageView.frame = CGRect(x: 10, y: 0, width: 25, height: 25)
}
view.addSubview(imageView)
let label = UILabel()
label.text = "店舗"
label.frame = CGRect(x: 40, y: 0, width: 200, height: 25)
view.addSubview(label)
if #unavailable(iOS 15.0) { //setting here; works
let padding: CGFloat = 20
view.frame = CGRect(x: view.frame.origin.x - padding,
y: view.frame.origin.y - padding,
width: view.frame.width + 2 * padding,
height: view.frame.height + 2 * padding)
tableView.tableHeaderView = view // this is good
label.frame = CGRect(x: 40, y: 20, width: 200, height: 25)
}
return view
}
} else {
if self.tableView(tableView, numberOfRowsInSection: section) > 0 {
let view = UIView()
let imageView = UIImageView(image: UIImage(named: "pinIconForSearch"))
if #unavailable(iOS 15.0) {
imageView.frame = CGRect(x: 10, y: 20, width: 25, height: 25)
} else {
imageView.frame = CGRect(x: 10, y: 0, width: 25, height: 25)
}
view.addSubview(imageView)
let label = UILabel()
label.text = "検索候補"
label.frame = CGRect(x: 40, y: 0, width: 200, height: 25)
view.addSubview(label)
if #unavailable(iOS 15.0) { //setting here doesnt work
let padding: CGFloat = 20
view.frame = CGRect(x: view.frame.origin.x - padding,
y: view.frame.origin.y - padding,
width: view.frame.width + 2 * padding,
height: view.frame.height + 2 * padding)
tableView.tableHeaderView = view // this is not good
label.frame = CGRect(x: 40, y: 20, width: 200, height: 25)
}
return view
}
}
}
if #available(iOS 15.0, *) {
tableView.sectionHeaderTopPadding = 0.0
} else {}
return nil
}
I want bView to be free of shadows. How can I achieve this?
I want to shadow all subviews of the superView, so I cannot remove the shadow settings of the superView.
let superView: UIView = UIView(frame: CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: self.view.frame.size.height))
superView.layer.shadowColor = UIColor.lightGray.cgColor
superView.layer.shadowOffset = CGSize(width: 0, height: 3)
superView.layer.shadowOpacity = 0.2
superView.layer.shadowRadius = 5
self.view.addSubview(superView)
let aView: UIView = UIView(frame: CGRect(x: 10, y: 100, width: 100, height: 100))
aView.backgroundColor = .white
superView.addSubview(aView)
let bView: UIView = UIView(frame: CGRect(x: 10, y: 230, width: 100, height: 100))
bView.backgroundColor = .white
superView.addSubview(bView)
I have tried bView.clipsToBounds = true but it's not working.
If you give superView a non-clear background color then none of its subviews will get a shadow. You can then apply a shadow to the subviews that you want to have a shadow.
let superView: UIView = UIView(frame: CGRect(x: 0, y: 0, width: 300, height: 350))
superView.backgroundColor = .white // <-- Add this line
superView.layer.shadowColor = UIColor.black.cgColor
superView.layer.shadowOffset = CGSize(width: 0, height: 3)
superView.layer.shadowOpacity = 0.2
superView.layer.shadowRadius = 5
view.addSubview(superView)
let aView: UIView = UIView(frame: CGRect(x: 10, y: 100, width: 100, height: 100))
aView.backgroundColor = .white
// Add shadow to aView
aView.layer.shadowColor = UIColor.black.cgColor
aView.layer.shadowOffset = CGSize(width: 0, height: 3)
aView.layer.shadowOpacity = 0.2
aView.layer.shadowRadius = 5
superView.addSubview(aView)
let bView: UIView = UIView(frame: CGRect(x: 10, y: 230, width: 100, height: 100))
bView.backgroundColor = .white
superView.addSubview(bView)
If you have several views that need a shadow then I would define a method to make it easier:
extension UIView {
func addShadow() {
layer.shadowColor = UIColor.black.cgColor
layer.shadowOffset = CGSize(width: 0, height: 3)
layer.shadowOpacity = 0.2
layer.shadowRadius = 5
}
}
Then your code becomes something like this:
let superView: UIView = UIView(frame: CGRect(x: 0, y: 0, width: 300, height: 350))
superView.backgroundColor = .white
superView.addShadow()
view.addSubview(superView)
let aView: UIView = UIView(frame: CGRect(x: 10, y: 100, width: 100, height: 100))
aView.backgroundColor = .white
aView.addShadow()
superView.addSubview(aView)
let bView: UIView = UIView(frame: CGRect(x: 10, y: 230, width: 100, height: 100))
bView.backgroundColor = .white
superView.addSubview(bView)
I am looking for a solution to my problem. I have a class that creates a UIButton for me:
class MenuButton: UIButton {
var x: CGFloat
var y: CGFloat
var width: CGFloat
var height: CGFloat
required init(parent: UIView = UIView(), x: CGFloat = 0, y: CGFloat = 0, width: CGFloat = 40, height: CGFloat = 40) {
self.x = x
self.y = y
self.width = width
self.height = height
super.init(frame: .zero)
frame = CGRect(x: x, y: y, width: width, height: height)
backgroundColor = global.labelColor
setTitleColor(#colorLiteral(red: 0, green: 0, blue: 0, alpha: 1), for: .normal)
layer.cornerRadius = self.frame.height / 2
if x < 0 {
frame = CGRect(x: superview?.frame.width ?? 0 - abs(x) - frame.width, y: frame.minY, width: frame.width, height: frame.height)
}
if y < 0 {
frame = CGRect(x: frame.minX, y: superview?.frame.height ?? 0 - abs(y) - frame.height, width: frame.width, height: frame.height)
}
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
Then I add a constant that is assigned to this class:
let pauseButton = MenuButton()
This works fine and the button is shown on the scene with everything to default. Now I want to add those things in the viewDidLoad() (I added the subview to acces it in the class):
view.addSubview(pauseButton)
pauseButton.x = -20
pauseButton.y = 20
pauseButton.width = 40
pauseButton.height = 40
This does not update the stuff I specified in the init(). How do I call the init again (without doing pauseButton = MenuButton() again) or is there like an update() I can use?
Thank you for your help ;)
You can actually pass those values in the initializer as below,
let pauseButton = MenuButton(parent: view, x: -20, y: 20, width: 40, height: 40)
If you want to make your button update immediately as you change any of these properties then you can use didSet callback to set the frame as below,
class MenuButton: UIButton {
var x: CGFloat {
didSet {
self.updateFrame()
}
}
var y: CGFloat {
didSet {
self.updateFrame()
}
}
var width: CGFloat {
didSet {
self.updateFrame()
}
}
var height: CGFloat {
didSet {
self.updateFrame()
}
}
private func updateFrame() {
frame = CGRect(x: x, y: y, width: width, height: height)
}
required init(parent: UIView = UIView(), x: CGFloat = 0, y: CGFloat = 0, width: CGFloat = 40, height: CGFloat = 40) {
self.x = x
self.y = y
self.width = width
self.height = height
super.init(frame: .zero)
frame = CGRect(x: x, y: y, width: width, height: height)
backgroundColor = .green
setTitleColor(#colorLiteral(red: 0, green: 0, blue: 0, alpha: 1), for: .normal)
layer.cornerRadius = self.frame.height / 2
if x < 0 {
frame = CGRect(x: superview?.frame.width ?? 0 - abs(x) - frame.width, y: frame.minY, width: frame.width, height: frame.height)
}
if y < 0 {
frame = CGRect(x: frame.minX, y: superview?.frame.height ?? 0 - abs(y) - frame.height, width: frame.width, height: frame.height)
}
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
each UIViewController have UIView accessed inside of it as view
you are adding the subview already here.
view.addSubview(pauseButton)
so just pass it into the init() you have and add it there.
your code could be something like this.
class MenuButton: UIButton {
var x: CGFloat
var y: CGFloat
var width: CGFloat
var height: CGFloat
required init(parent: UIView = UIView(), x: CGFloat = 0, y: CGFloat = 0, width: CGFloat = 40, height: CGFloat = 40) {
self.x = x
self.y = y
self.width = width
self.height = height
super.init(frame: .zero)
frame = CGRect(x: x, y: y, width: width, height: height)
backgroundColor = global.labelColor
setTitleColor(#colorLiteral(red: 0, green: 0, blue: 0, alpha: 1), for: .normal)
layer.cornerRadius = self.frame.height / 2
if x < 0 {
frame = CGRect(x: superview?.frame.width ?? 0 - abs(x) - frame.width, y: frame.minY, width: frame.width, height: frame.height)
}
if y < 0 {
frame = CGRect(x: frame.minX, y: superview?.frame.height ?? 0 - abs(y) - frame.height, width: frame.width, height: frame.height)
}
parent.addSubview(self)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
And use it in ViewDidLoad like this.
let _ = MenuButton(parent: view, x: -20, y: 20, width: 40, height: 40)
init() method is called only once when you instantiating your button. You should try to instantiate the button with the desired properties. Try something like this:
let pauseButton = MenuButton(parent: UIView(), x: -20, y: 20, width: 40, height:40)
Then in your viewDidLoad() method you can have just this line:
view.addSubview(pauseButton)
Another problem that I noticed is that you are referencing to the superview in your init() method, but superview is always nil in that case, since your button is not yet added as a subview.
have you tried ?
button.frame = CGRect(x:xPostion, y:yPostion, width:buttonWidth, height:buttonHeight)
or u can declare a funtion called updateFrame in ur Menu button class and pass new position as argument , like this :
func updateFrame(x:CGFloat, y: CGFloat, width: CGFloat, height: CGFloat){
self.frame = CGRect(x:xPostion, y:yPostion, width:buttonWidth, height:buttonHeight)
}
and in your VideDidLoad :
button.updateFrame(x:xPostion, y:yPostion, width:buttonWidth, height:buttonHeight)
what you are doing at the moment is just assigning some values to your Button's properties, how should your button knows to use them to reset its frame ??
I want to setup my scrollView like this video (I know in video use collectionview bu for some reason I want convert this effect to scrollView)
https://www.dropbox.com/s/kj6xgj68gz6258p/ScreenRecording_06-26-2018%2019-15-43.MP4
3 important thing:
scroll must snap to center when scrolling
resize current item (forward item is bigger than backward item)
swift
UPDATE:
var ScrollView = UIScrollView()
var arr : Array<UIColor> = [.red,.blue,.green]
override func viewDidLoad() {
super.viewDidLoad()
ScrollView.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(ScrollView)
ScrollView.widthAnchor.constraint(equalToConstant: self.view.frame.size.width).isActive = true
ScrollView.heightAnchor.constraint(equalToConstant: 320).isActive = true
ScrollView.centerYAnchor.constraint(equalTo: self.view.centerYAnchor, constant: 0).isActive = true
ScrollView.alwaysBounceVertical = false
ScrollView.isPagingEnabled = true
ScrollView.contentSize = CGSize(width: 3.0 * self.view.frame.size.width, height: 320)
ScrollView.contentOffset = CGPoint(x: view.frame.size.width, y: 0)
ScrollView.center = self.view.center
for i in 0..<3 {
let viewBG = UIView()
viewBG.backgroundColor = arr[i]
if (i == 0) {
viewBG.frame = CGRect(x: view.frame.size.width * CGFloat(i) + 125, y: 0, width: view.frame.size.width - 100, height: 320)
} else if(i == 1) {
viewBG.frame = CGRect(x: view.frame.size.width * CGFloat(i) + 50, y: 0, width: view.frame.size.width - 100, height: 320)
} else {
viewBG.frame = CGRect(x: view.frame.size.width * CGFloat(i) - 25, y: 0, width: view.frame.size.width - 100, height: 320)
}
ScrollView.addSubview(viewBG)
}
}
thanks guys
Use iCarousal. It is easy to implement and Swift example is also available.
Following is link -
https://github.com/nicklockwood/iCarousel
I want to calculate view size with autolayout, but it can not get right value. Here is my code
// build views
let view = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
let posterView = UIImageView(frame: CGRect(x: 0, y: 0, width: 50, height: 100))
let titleLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 100, height: 20))
titleLabel.text = "Title "
titleLabel.font = UIFont.systemFontOfSize(16) // label height = 19.5
view.addSubview(posterView)
view.addSubview(titleLabel)
posterView.snp_makeConstraints { (make) in
make.top.left.right.equalTo(view).offset(0)
make.width.equalTo(posterView.snp_height).multipliedBy(16.0 / 9.0)
}
titleLabel.snp_makeConstraints { (make) in
make.top.equalTo(posterView.snp_bottom).offset(0)
make.left.equalTo(view).offset(0).priority(750)
make.right.equalTo(view).offset(0).priority(750)
make.bottom.equalTo(view.snp_bottom).offset(0)
}
// calculate
view.translatesAutoresizingMaskIntoConstraints = false
let heightConstraint = NSLayoutConstraint(item: view, height: 90+19.5)
view.addConstraint(heightConstraint)
let fittingSize = view.systemLayoutSizeFittingSize(UILayoutFittingCompressedSize)
// the fittingSize is (40,109.5), not expect value (160, 109.5)
Please don't tell me how to calculate dynamic height for UITableViewCell. This is a opposite problem from height to width.
Thanks