I am trying to implement material design in our cross platform app. when I use corner radius on button, on android it works fine but on iOS I get below result but when I remove corner radius it renders properly:
the code is as simple as with visual material in the contentpage
This weird appearance occurs when your button doesn't have enough height to display corner radius.
setting the height 2 multipliers to the radius resolves the issues and renders the button properly
Related
I am trying to animate my page so that when the settings icon(in the top right) is clicked, the settings page will expand from the top right as a circle over the current main page.Example settings page
Also when you click on the corner of the mainpage I want to close the circle.
Does anyone have any idea of how I could do this?
I found a solution to my question here: Popout frame
I created a frame with a corner radius such that the frame was a circle shape then I used a scale animation to make it pop in and out.
I am implementing cradle tab bar for my nativescript-angular project. I've already found a good example on nativescripting.com:
https://nativescripting.com/posts/cradle-tab-bar-animation-in-nativescript?utm_source=twitter&utm_medium=tweet&utm_campaign=nativescript
Proposed tab bar was implemented with help of three layouts:
left layout (left from the circle);
center layout (where the circle is);
right layout (right from the circle).
In order to achive smooth transition between center layout and adjacent layouts, center layout was implemented as circle with border that covers half-height white grid (Design of tab bar).
My goal is to make a space between circle and another part of tab bar transparent so scrolling of page was visible on background of tab bar.
Now I am trying to make custom shape for center layout (figure that is the result of excluding circle from rectangle). I found an article and video for creating simple shapes but it seems it has no support for nativescript-angular project:
https://nativescripting.com/posts/nativescript-shapes-2-methods-for-creating-shape-views
So, how can I create shapes in nativescript-angular project and how to create advanced ones?
The problem to be solved here is how to zoom in a UIScrollView while staying centered. If you don't take some sort of precautions, the default is that as we zoom out, the zoomed view slides up to the top left corner of the scroll view, like this:
So how to prevent this, and keep the zoomed view in the center as we zoom? As you probably know, there are traditional ways of handling this by messing with the scroll view's layout, as described by Josh and Eliza in the brilliant classic WWDC video 104 from 2010. This can be done by using a delegate or by subclassing UIScrollView, and gives the desired result:
Now comes WWDC 2017 video 201 (https://developer.apple.com/videos/play/wwdc2017/201/?time=1496), and there's Eliza making a claim that the new (iOS 11) contentLayoutGuide solves the problem of zooming while staying centered in a new way: she says to center the content view at the center of the content layout guide.
But she doesn't demonstrate. And when I try it for myself, I find it isn't solving the problem. I'm zooming in just fine, but when zooming out, so that the zoom scale is smaller than 1, the content view moves up to the top left, just as it always has.
Has anyone figured out what this claim in the video actually means? How does iOS 11 make it easier to zoom centered than in the past?
EDIT I actually received a sample project from Apple in response to my bug report, which they claimed illustrated how to solve this, and it didn't! So I conclude that even Apple doesn't know what they're talking about here.
The view goes to the top left because the contentSize of the scroll view is not defined. When using the new Auto Layout guides in iOS 11, it's still necessary to define the contentSize.
Add the following constraints:
scrollView.contentLayoutGuide.widthAnchor.constraint(equalTo: scrollView.frameLayoutGuide.widthAnchor),
scrollView.contentLayoutGuide.heightAnchor.constraint(equalTo: scrollView.frameLayoutGuide.heightAnchor)
This worked for me, when I had a contentView with a fixed width/height and the following additional constraints:
// give the centerView explicit height and width constraints
centerView.widthAnchor.constraint(equalToConstant: 500),
centerView.heightAnchor.constraint(equalToConstant: 500),
// pin the center of the centerView to the center of the scrollView's contentLayoutGuide
centerView.centerXAnchor.constraint(equalTo: scrollView.contentLayoutGuide.centerXAnchor),
centerView.centerYAnchor.constraint(equalTo: scrollView.contentLayoutGuide.centerYAnchor)
This is the solution you are / everybody is looking for. In my case I want to center a view inside a table view scroll view. So if the table view scrolls the custom view will always be in the center of the scroll view content.
// create a view
let v:UIView = UIView(frame:CGRect.zero) // use zero if using constraints
ibTableView.addSubview(v)
ibTableView.bringSubview(toFront:v)
v.translatesAutoresizingMaskIntoConstraints = no
v.backgroundColor = .yellow
v.widthAnchor.constraint(equalToConstant:100).isActive = yes
v.heightAnchor.constraint(equalToConstant:100).isActive = yes
// set scrollview guides
ibTableView.contentLayoutGuide.widthAnchor.constraint(equalTo:ibTableView.frameLayoutGuide.widthAnchor).isActive = yes
ibTableView.contentLayoutGuide.heightAnchor.constraint(equalTo:ibTableView.frameLayoutGuide.heightAnchor).isActive = yes
// anchor view
v.centerXAnchor.constraint(equalTo:ibTableView.contentLayoutGuide.centerXAnchor).isActive = yes
v.centerYAnchor.constraint(equalTo:ibTableView.contentLayoutGuide.centerYAnchor).isActive = yes
I have just upgraded Unity to version 4.6 and tried to create a button by Create -> UI -> Button.
However, this button doesn't show up in #Screen tab but it does in Game tab.
Please look at the screen shoot below:
Another question is: The default width and height when creating a new button is 160 x 30. When I change the source image with my own image button, I have to change the width and height parameters in rect transform. Is there any faster way to automatically obtain new width and height based on the image which I insert?
Thank you very much!
First, double click the button in your hierarchy and see that it indeed does not show in the Scene view, excluding any kind of zoom problem. (By the way, I'm assuming you mean "Scene" and not "Screen", right?) Things in different cameras or canvases might have very different scales but appear correctly in the Game view. I don't know how used you are to Unity, so I'm sorry if this sounds obvious. :)
Next, check the dropdown labeled "Layers" on top of Unity's editor, to the right of the Play, Pause and Step buttons. See if the layer of your button (which in this case is "UI") is visible. It should have an open eye icon next to it.
Regarding your other question, after dragging your sprite to the Image component, you can press the "Set Native Size" button, which will set the size of your object to the dimensions of your Sprite. Regarding the new UI, I think this is as automatic as it gets. Note that "Set Native Size" will only appear if your Image type is set to Simple (probably what you want) or Filled in the component.
I had the same problem before and here's a possible solution.
By default, the editor camera (Scene Tab) renders the World Space,
so your Canvas component's render mode should be set to "World Space".
The problem may only occur when you're trying to (or supposedly) render your UI in Screen Space - Overlay or Screen Space - Camera in the Canvas component.
So if you want to properly edit UI objects in the scene tab/window; set the Canvas component's render mode to World Space.
We don't have this problem in Unity 4.x before because I think Unity automatically renders any render mode from the Canvas component, however, that doesn't happen in Unity 5.x. I'm guessing it's either intentional that they do that or it's a bug on Unity UI feature.
I'm using xcode 4.5.2 to learn to develop in iOS6. I have this code in my drawRect...
- (void)drawRect:(CGRect)rect
{
CGContextRef context = UIGraphicsGetCurrentContext();
CGPoint midPoint;
midPoint.x = self.bounds.origin.x + self.bounds.size.width/2;
midPoint.y = self.bounds.origin.y + self.bounds.size.height/2;
... etc
For some reason when I run this in iphone simulator, the result is always
midpoint.x = 160
midpoint.y = 252
regardless of whether the simulator (iPhone retina screen) is in portrait mode or rotated to landscape. The result is thus the graphic that I draw in portrait mode is centred on the screen correctly, but offset to the left in landscape.
Can someone suggest where do I begin to look as to why this is the case?
This drawRect code came directly from an earlier app I wrote which functioned correctly in terms of determining this midpoint of the screen (a UIView spanning the whole screen). This problem arises when I imported this code (the whole class) into my currently program which is segue-ing into instances of these UIViews.
Thanks.
figured it out, I think...
it appears that for unknown reasons (to me anyway), when the phone gets rotated, the view inside the phone did not get resized to fill the new vertical & horizontal dimensions. Thus the midpoint coordinates are always the same - because the view basically did not resize. In the size inspector, the view's got struts on the left & right only and no springs.
By adding both vertical & horizontal springs, the view seems to resize with rotation and the midpoint coordinate seem to change accordingly.
While I've gotten by my hurdle, I'm still unclear why I needed to add springs to the view, since the demo that I was following did not seem to require this step. Any suggestions would be appreciated. Thanks.