I have a button with a title and image. The title of the button change dependent on the selected language. So i want that the button has always the width of the title plus image. I thought it was something easy like this:
var size = selectMenuItemButton.attributedTitle.size
myButton.bounds.size.width = size.width + 10.0
But the width of the button stay the same. What i'm doing wrong?
Edit:
Also try
myButton.frame.size.width = size.width + 10.0
And
myButton.sizeToFit()
Didn't work neither
Edit2:
I have created a clear project with two buttons. If the one button is clicked the title of the another button is changed. The outcome is the same, i want that the width is change too, but i can't achieve that
#IBAction func buttonClicked(sender: AnyObject) {
println(test.attributedTitle.size.width)
myButton.title = "blublublublub"
var size = test.attributedTitle.size
myButton.frame.size.width = size.width
println(test.attributedTitle.size.width)
}
I think i have the answer, i needed just set title again after i set the size:
myButton.title = "blublublublub"
var size = myButton.attributedTitle.size
myButton.frame.size.width = size.width
myButton.title = "blublublublub"
If someone want to change the size outside #IBAction you need to use dispatch:
dispatch_async( dispatch_get_main_queue()){
self.myButton.title = "blublublublub"
var size = self.myButton.attributedTitle.size
self.myButton.frame.size.width = size.width
self.myButton.title = "blublublublub"
}
Related
Update: Nov.6
Thanks to pointum I revised my question.
On 10.13, I'm trying to write a view snapshot function as general purpose NSView or window extension. Here's my take as a window delegate:
var snapshot : NSImage? {
get {
guard let window = self.window, let view = self.window!.contentView else { return nil }
var rect = view.bounds
rect = view.convert(rect, to: nil)
rect = window.convertToScreen(rect)
// Adjust for titlebar; kTitleUtility = 16, kTitleNormal = 22
let delta : CGFloat = CGFloat((window.styleMask.contains(.utilityWindow) ? kTitleUtility : kTitleNormal))
rect.origin.y += delta
rect.size.height += delta*2
Swift.print("rect: \(rect)")
let cgImage = CGWindowListCreateImage(rect, .optionIncludingWindow,
CGWindowID(window.windowNumber), .bestResolution)
let image = NSImage(cgImage: cgImage!, size: rect.size)
return image
}
}
to derive a 'flattened' snapshot of the window is what I'm after. Initially I'm using this image in a document icon drag.
It acts bizarrely. It seems to work initially - window in center, but subsequently the resulting image is different - smaller, especially when window is moved up or down in screen.
I think the rect capture is wrong ?
Adding to pointum's answer I came up with this:
var snapshot : NSImage? {
get {
guard let window = self.window, let view = self.window!.contentView else { return nil }
let inf = CGFloat(FP_INFINITE)
let null = CGRect(x: inf, y: inf, width: 0, height: 0)
let cgImage = CGWindowListCreateImage(null, .optionIncludingWindow,
CGWindowID(window.windowNumber), .bestResolution)
let image = NSImage(cgImage: cgImage!, size: view.bounds.size)
return image
}
}
As I only want / need a single window, specifying 'null' does the trick. Well all else fails, the docs, if you know where to look :o.
Use CGWindowListCreateImage:
let rect = /* view bounds converted to screen coordinates */
let image = CGWindowListCreateImage(rect, .optionIncludingWindow,
CGWindowID(window.windowNumber), .bestResolution)
To save the image use something like this:
let dest = CGImageDestinationCreateWithURL(url, "public.jpeg", 1, nil)
CGImageDestinationAddImage(destination, image, nil)
CGImageDestinationFinalize(destination)
Note that screen coordinates are flipped. From the docs:
The coordinates of the rectangle must be specified in screen coordinates, where the screen origin is in the upper-left corner of the main display and y-axis values increase downward
I'm trying to add profile icons via UIImageViews to a UIStackView in order to keep the icons centered in a view. How would I go about adding UIImageViews of a fixed frame to a UIStackView and keep the UIStackView centered in the main view according to varying numbers of UIImageViews in the UIStackView?
let memberIcons: UIStackView = {
let iconView = UIStackView()
iconView.translatesAutoresizingMaskIntoConstraints = false
iconView.axis = .horizontal
iconView.spacing = 5
iconView.distribution = .equalSpacing
iconView.alignment = .center
return iconView
}()
for member in story!.members {
let circle = UIImageView()
circle.frame = CGRect(x: 0, y: 0, width: 36, height: 36)
circle.translatesAutoresizingMaskIntoConstraints = false
circle.layer.cornerRadius = CGFloat(circle.frame.width / 2)
circle.image = member.profilePicture
circle.contentMode = .scaleAspectFill
circle.clipsToBounds = true
memberIcons.addArrangedSubview(circle)
}
Because you set memberIcons.distribution = .equalSpace, the stack view will ask its subviews for their intrinsic sizes. When asked, the UIImage (i.e. circle) will calculate its intrinsic size as "image pixel size / scale", which is not what you want -- you want the image to be of fixed size (36 x 36).
Use Auto Layout on circle:
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(memberIcons)
memberIcons.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
memberIcons.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
// Limit the stack view's width to no more than 75% of the superview's width
// Adjust as needed
memberIcons.widthAnchor.constraint(lessThanOrEqualTo: view.widthAnchor, multiplier: 0.75).isActive = true
let width: CGFloat = 36.0
for member in story!.members {
// We don't care about the frame here as we're gonna use auto layout
let circle = UIImageView(frame: .zero)
circle.translatesAutoresizingMaskIntoConstraints = false
circle.layer.cornerRadius = width / 2
circle.image = member.profilePicture
circle.contentMode = .scaleAspectFill
circle.clipsToBounds = true
circle.layer.borderWidth = 1
circle.layer.borderColor = UIColor.lightGray.cgColor
memberIcons.addArrangedSubview(circle)
circle.widthAnchor.constraint(equalToConstant: width).isActive = true
circle.heightAnchor.constraint(equalToConstant: width).isActive = true
}
}
Result:
Because we limit the width of the UIStackView, there a maximum number of profile images you can add (7 in this case) before you get a bunch of auto layout error on the console. You can enclose the Stack View inside a Scroll View or use a Collection View for a matrix-like display.
I have NSAttributedString objects with embedded images. These are being presented in NSTextViews. In iOS, I was able to resize the bounds of NSTextAttachment, and this makes the image fit.
extension NSTextAttachment {
func setImageWidth(width: CGFloat, range: NSRange) {
var thisImage = image
if thisImage == nil {
thisImage = imageForBounds(bounds, textContainer: nil, characterIndex: range.location)
}
if thisImage != nil {
let ratio = thisImage!.size.height / thisImage!.size.width
bounds = CGRectMake(bounds.origin.x, bounds.origin.y, width, ratio * width)
print("New Bounds: \(bounds)")
}
}
}
This code also runs on OSX, but it does not actually resize the image. Below you can see, there is a box of the correct size around the image, but the actual image overflows the box.
I have also followed the following guide: Implementing Rich Text with Images on OS X and iOS. This moves the code to subclasses, but has the same effect.
Any suggestions? Is there something besides NSTextAttachment.bounds that I should be adjusting?
UPDATE
I found that modifying the size component of NSImage works! However, it is now showing all my images upside, but at the correct size. :(
Solved!
extension NSImage {
func resizeToFit(containerWidth: CGFloat) {
var scaleFactor : CGFloat = 1.0
let currentWidth = self.size.width
let currentHeight = self.size.height
if currentWidth > containerWidth {
scaleFactor = (containerWidth * 0.9) / currentWidth
}
let newWidth = currentWidth * scaleFactor
let newHeight = currentHeight * scaleFactor
self.size = NSSize(width: newWidth, height: newHeight)
print("Size: \(size)")
}
}
As I mentioned in the update, you need to change the NSImage.size. The flip was coming from one of the subclasses I had left in there from the link in the question. Once I went back to the main classes, it works!
I have a NSViewController and a variable num. I want to change the size of the window dynamically according to that variable. Is there any way to do that in swift?
Let's say your window has an IBOutlet named "window", and your dynamic number is named "myDynamicNumber":
func resize() {
var windowFrame = window.frame
let oldWidth = windowFrame.size.width
let oldHeight = windowFrame.size.height
let toAdd = CGFloat(myDynamicNumber)
let newWidth = oldWidth + toAdd
let newHeight = oldHeight + toAdd
windowFrame.size = NSMakeSize(newWidth, newHeight)
window.setFrame(windowFrame, display: true)
}
In Swift 3 to resize the window you use setFrame.
An example from the ViewController:
func resizeWin(size:(CGFloat,CGFloat)){
self.view.window?.setFrame(NSRect(x:0,y:0,width:size.0,height:size.1), display: true)
}
I needed to toggle viewing a text view so I overlaid the window an invisible view - hideRect just short of the text view; in this way I can resize to the smaller (hideRect) and restore later to the original size - origRect. Hide and original rect captured at viewDidLoad(). Swift 3/Xcode 8.3.3
// class global contants
let kTitleUtility = 16
let kTitleNormal = 22
#IBOutlet var hideView: NSView!
var hideRect: NSRect?
var origRect: NSRect?
#IBAction func toggleContent(_ sender: Any) {
// Toggle content visibility
if let window = self.view.window {
let oldSize = window.contentView?.bounds.size
var frame = window.frame
if toggleButton.state == NSOffState {
frame.origin.y += ((oldSize?.height)! - (hideRect?.size.height)!)
window.setFrameOrigin(frame.origin)
window.setContentSize((hideRect?.size)!)
window.showsResizeIndicator = false
window.minSize = NSMakeSize((hideRect?.size.width)!,(hideRect?.size.height)!+CGFloat(kTitleNormal))
creditScroll.isHidden = true
}
else
{
let hugeSize = NSMakeSize(CGFloat(Float.greatestFiniteMagnitude), CGFloat(Float.greatestFiniteMagnitude))
frame.origin.y += ((oldSize?.height)! - (origRect?.size.height)!)
window.setFrameOrigin(frame.origin)
window.setContentSize((origRect?.size)!)
window.showsResizeIndicator = true
window.minSize = NSMakeSize((origRect?.size.width)!,(origRect?.size.height)!+CGFloat(kTitleNormal))
window.maxSize = hugeSize
creditScroll.isHidden = false
}
}
}
This also preserved the widow's visual origin, and sizing minimum.
I have looked everywhere and tested all the code snippets posted on Stack, but nothing works for me as I need it to work.
I simply want to set:
Nav bar height
Nav bar bg color in RGB
Nav bar centered logo
I'm working with iOS8, Xcode 6 and Swift.
Many thanks for a clear answer!
This is my code in ViewController.swift
// Set nav bar height
navigationController?.navigationBar.frame.origin.y = -10
// Set nav bar bg color
var navBarColor = UIColor(red: 4 / 255, green: 47 / 255, blue: 66 / 255, alpha: 1)
navigationController?.navigationBar.barTintColor = navBarColor
// Set nav bar logo
let navBarImageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 30, height: 30))
navBarImageView.contentMode = .ScaleAspectFit
let navBarImage = UIImage(named: "navBarLogo.png")
navBarImageView.image = navBarImage
navigationItem.titleView = navBarImageView
After applying the code in the accepted answer, the height doesn't seem to change at all..
It's not an easy job...and I've surveyed several articles online (most of them in Objective-C).
The most useful one is this: http://www.emdentec.com/blog/2014/2/25/hacking-uinavigationbar
But its final solution does not put items in the middle, and it's not in Swift.
So I come up with a workable version in Swift. Hope it helps some people as I was saved so many precious time on SO.
Solution in Swift:
The following code will solve some issues you may have encountered:
The title & items are not placed in the middle of the navigation bar
The title & items would flick when the user navigates between view controllers
You need to subclass the UINavigationBar first, and in your storyboard, select the navigation bar element, and in the "Identity Inspector" tab, set the new class as the Custom Class
import UIKit
class UINavigationBarTaller: UINavigationBar {
///The height you want your navigation bar to be of
static let navigationBarHeight: CGFloat = 64
///The difference between new height and default height
static let heightIncrease:CGFloat = navigationBarHeight - 44
override init(frame: CGRect) {
super.init(frame: frame)
initialize()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
initialize()
}
private func initialize() {
let shift = UINavigationBarTaller.heightIncrease/2
///Transform all view to shift upward for [shift] point
self.transform =
CGAffineTransformMakeTranslation(0, -shift)
}
override func layoutSubviews() {
super.layoutSubviews()
let shift = UINavigationBarTaller.heightIncrease/2
///Move the background down for [shift] point
let classNamesToReposition: [String] = ["_UINavigationBarBackground"]
for view: UIView in self.subviews {
if classNamesToReposition.contains(NSStringFromClass(view.dynamicType)) {
let bounds: CGRect = self.bounds
var frame: CGRect = view.frame
frame.origin.y = bounds.origin.y + shift - 20.0
frame.size.height = bounds.size.height + 20.0
view.frame = frame
}
}
}
override func sizeThatFits(size: CGSize) -> CGSize {
let amendedSize:CGSize = super.sizeThatFits(size)
let newSize:CGSize = CGSizeMake(amendedSize.width, UINavigationBarTaller.navigationBarHeight);
return newSize;
}
}
Also on my gist: https://gist.github.com/pai911/8fa123d4068b61ad0ff7
iOS 10 Update:
Unfortunately, this code breaks in iOS 10, there is someone who helps fix it, here you go:
iOS 10 custom navigation bar height
And to be clear, this code is kind of hacky since it depends on the navigation bar's internal structure...so if you decide to use it anyway, be prepared for any upcoming changes that may break this code...
Nav bar height:
In a custom navigation controller subclass...
The trick with this one is to NOT change the actual height of the navigation bar and instead adjust its origin.
func viewDidLoad() {
super.viewDidLoad()
navigationBar.frame.origin.y = -10
}
Nav bar bg color in RGB:
In a custom navigation controller subclass...
func viewDidLoad() {
super.viewDidLoad()
navigationBar.barTintColor = // YOUR COLOR
}
or use the appearance proxy
UINavigationBar.appearance().barTintColor = // YOUR COLOR
Nav bar centered logo
In a custom view controller...
func viewDidLoad() {
super.viewDidLoad()
navigationItem.titleView = UIImageView(image: // YOUR LOGO)
}
Great answer from Bon Bon!
In Swift 3 however make sure you replace
let classNamesToReposition: [String] = ["_UINavigationBarBackground"]
with
let classNamesToReposition: [ String ] = [ "_UIBarBackground" ]
Otherwise, it wont work.