I have a problem with the new PHPicker on iOS 14. When my app request for photo library authorization, the system will prompt the user with three options, and if the user selects "select photos", the system will present a PHPicker in which the user can choose photos and videos that my app can access.
But now the navigation bar of the system PHPicker looks so awful that it has a black background and black text color (see the links below). I'm wondering how can customize its appearance.
Any replies are very much appreciated!
PHPicker
I found adjusting the global color for the Global navigation just before presentation helps. Then switch it back on return. Its hacky and annoying but it works.
UINavigationBar.appearance().tintColor = UIColor.white
UINavigationBar.appearance().barTintColor = UIColor(red: 36/255, green: 88/255, blue: 128/255, alpha: 1.0)
etc.
Related
In Xcode11, it was possible to make the background of the application window transparent from NSWindow.
In Xcode12, you can use AppKit App Delegate to make
'window.backgroundColor = NSColor(red: 0.5, green: 0.5, blue: 0.5, alpha: 0.5)'
I know that the background color will change if you write
I want to use the new ".command" added in Xcode12.
In order to do so, I think I'll have to use the SwiftUI App, but is there a good way to do that?
I don't know if this is the right way to do it, but I changed the ContentView to EmptyView and reduced the size of the first ContentView and then called another window with onAppear, so it worked.
My designer has specified a color to draw. When I try to draw that color in a Cocoa app, I get a resulting color that’s visibly different from the reference image as displayed by Sketch.app.
I made a small Cocoa app that draws a custom view. Here’s the interesting part of the code. Note that I am initializing the color in SRGB space.
class View: NSView {
override func drawRect(dirtyRect: NSRect) {
let components : [CGFloat] = [156.0/255.0, 0, 254.0/255.0, 1]
let color = NSColor.init(SRGBRed: components[0], green: components[1], blue: components[2], alpha: components[3])
color.setFill()
NSRectFill(self.bounds)
}
}
Here’s what it draws. (Nevermind the part about the cursor. And I removed the window shadow so it would be easier to review this side by side with other windows.)
And here’s the Sketch file portion:
Putting it all together, here’s a side by side of the Sketch file and the custom view, as well as Xscope loupe displaying the color value under the mouse cursor.
When hovering over Sketch file, I see this:
When hovering over my custom view, I see this:
You can see that the color value of the pixel under the black mouse cursor as read by Xscope is significantly different. The colors also look significantly different on my Retina Macbook Pro display, though interestingly, not so different in the captured screenshot PNG.
HOWEVER: so far, this was all done with default display settings and color profile “Color LCD” (the hardware is Retina Macbook Pro with its built-in display). When I manually change the display profile to “sRGB IEC61966-2.1” in OSX Settings app, and then sample the colors again with Xscope, you can see these sampled values:
And when sampling the custom view:
Most interestingly, you can see that the values sampled by Xscope on my custom view exactly match the specified values, and the color is also visually correct. But of course, I can’t make my users change their display profile.
My question: how do I make my custom view color exactly match the color in Sketch (both for visual inspection and when sampled with the Xscope loupe) with the default Color LCD display profile?
Just worked through this issue myself. Here's my process. Just tested on a Retina Macbook Pro.
Open Sketch.
Open Digital Color Meter (installed on OSX)
Switch to 'Display in Generic RGB'
In menu, ensure that 'View -> Display Values -> As Decimal`
Mouse over your color of the artwork in sketch and note the values (e.g. 0, 150, 200)
Use that value in Cocoa:
-(void)drawRect:(NSRect)dirtyRect {
[[NSColor colorWithCalibratedRed:0/255.0 green:150/255.0 blue:200/255.0 alpha:1] set];
NSRectFill(self.bounds);
}
This should work, as 'Generic RGB' is a device independent space equivalent to the 'calibrated' color space in Cocoa.
I need to know, which is the best way to blur the background of the Windows Phone 7 app to concentrate the user's attention on a "always on top" popup window.
My idea is:
Make an in-memory screenshot of the background grid (by turning it into a freezable or something).
Add an image that overlaps the background grid, but is below (with the z-index) the popup.
Still I doubt I will be able to overlap the application bar.
At this point, if you have a solution, please advise.
A few pointers for you ...
Unfortunately the Silverlight BlurEffect and other Bitmap effects didn't make it into Window Phone 7, so you will have to implement the blur yourself. This is actually pretty simple, just use a Gaussian Convolution Filter.
To achieve this effect you can capture the visuals of your application into a WriteableBitmap, manipulate the image to create your blur, then overlay this image over your application using a PopUp. I did something similar in a blog post I wrote about fly-out text animations here:
http://www.scottlogic.co.uk/blog/colin/2011/04/metro-in-motion-3-flying-titles/
Find your root visual as follows:
var rootElement = Application.Current.RootVisual as FrameworkElement;
Add a copy of this UI into a popup as follows:
_backgroundMask = new Rectangle()
{
Fill = new SolidColorBrush(Colors.Black),
Opacity = 0.0,
Width = rootElement.ActualWidth,
Height = rootElement.ActualHeight
};
_popupCanvas.Children.Add(_backgroundMask);
_targetElementClone = new Image()
{
Source = new WriteableBitmap(element, null)
};
_popupCanvas.Children.Add(_targetElementClone);
And show it:
_popup.IsOpen = true;
I'll leave you to work out how to blur the background!
As an aside, your will not be able to overlay or capture the application bar visuals. Hide it before performing this transformation.
Finally, blurring the background isn't really very 'Metro'. Are you sure you want to do this?
Instead of blurring just use a semi transparent layer over the top of the page.
You should hide the application bar before trying to create such an effect as you won't be able to place anything on top of it.
I am creating a UIView containing some text that partially covers a UIImageView. I want the user to be able to read the text and still maintain a perspective on the image underneath. I have tried setting the background color to [UIColor clearColor], but then the background is totally transparent and it is hard to read the text depending upon the image colors.
If I lower the view.alpha=0.5 the whole view including the text is partially transparent. What I'd like is to maintain the text and reduce the transparency of the background partially, allowing the image to show through.
OPTION 1 - USING STORYBOARDS
For those who have their view in a storyboard or .xib, you simply do it in interface builder by selecting the option "Clear Color" for the Background of the view in the Utilities Pane (the pane on the right). "Clear Color" will give the view a completely transparent background.
If you need a background color that is partially transparent, select the desired background color with the color picker and use the Opacity slider at the bottom to set the transparency.
OPTION 2 - USING COLOR ASSETS (AND STORYBOARDS)
Another very useful option is to add colors to your .xcassets library, so that you can use the same color easily in different views. You can make these colors (semi-)transparent as well, here's how:
Open your .xcassets library
Add a Color Set
Give it a useful name and select the color thumbnail
In the Attributes Inspector you can then change the color and use the slider to adjust its opacity
Go back to your storyboard and select the view you need this transparent background color
In the Background option of in the Attributes Inspector you can now select the Color you added to your .xcassets library. This is very useful if you have multiple views across your app using the same background.
In code you can access the colors from your Color Assets using:
SWIFT (UIColor): UIColor(named: "DP Textfield")
SWIFTUI (Color): Color("DP Textfield")
I think what you mean is you want the backgroundColor of your UIView to be semi transparent? If you want white/transparent use this:
myView.backgroundColor = [UIColor colorWithWhite:myWhiteFloat alpha:myAlphaFloat];
else if you want it to be another color use the general UIColor method: +colorWithRed:green:blue:alpha:
This will work.
myView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.7f];
Eventually you already have a color so you could use .colorWithAlphaComponent like this:
let exampleColor = UIColor.blackColor()
overlayView.backgroundColor = exampleColor.colorWithAlphaComponent(0.8)
For Swift 4+ :
Black translucent view:
view.backgroundColor = UIColor.black.withAlphaComponent(0.5)
I believe you should use:
myView.alpha = myAlphaFloat;
myView.opaque = NO;
For Xamarin C#, at this time, the visual storyboard does not have the "opacity" slider of Xcode's storyboard mentioned by Bocaxica.
If you set BackgroundColor for View nameOfView in storyboard, then in your view controller's ViewDidLoad, add this line to set alpha:
nameOfView.BackgroundColor = nameOfView.BackgroundColor.ColorWithAlpha( 0.7f ); // A value between 0 and 1.
Swift 3+
white half transparent:
view.backgroundColor = UIColor(white: 1, alpha: 0.5)
or black half transparent:
view.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.5)
I need to let the user to customize the HUD window appearance. Is there a way to change the frame and the title area color of HUD window? There is an API for changing a background color of the window, but title and the frame stay semitransparent black. I'd like to avoid drawing these areas by myself.
Thanks,
Nava
In case nobody knows, I found a couple of links that do it. One of them is a Synapse project, which shows how to use private headers and draws the window by itself. Definitely it's not straight forward and IMO should be allowed by native interfaces. Many thanks to the guy that wrote it:
Synapse project