I'm building a grid using UIViewTable and adding 4 items for each cel.
However, when I rotate to portrait, I need to reduce the number of items from 4 to 3. And therefore I recompute the rowsArray and I display again the table.
Is this the correct way to proceed ?
thanks
I advice you to use AQGridView
https://github.com/AlanQuatermain/AQGridView
It's an open source grid implementation that is simple and that have many samples.
otherwise, if you add items like described, you will have to redraw all cells content every time the orientation change
Related
below i attached an app help guide screen. I am understanding how to build this screen.
If any body have idea please share here
View with semi transparent background color (backgroundColor:"rgba(0,0,0,0.5)";) and some images on top of it.
So, using images is bad. You'll need images for translations and if you do this as one image you'll need to ensure all devices are covered so your arrows point to the right element.
Minimise images == smaller app.
First thing you'll need to do is a create a blocker view -- so that's a view that will fill the screen and have a black background with opacity.
You can't apply that to the window as everything in it will be semi-transparent so:
Create a transparent Window that fills the screen.
Add to that window a view that fills the window and has opacity say 0.5 and black background
Add to the Window (not the view you just created) the other elements and button -- ideally, these should be individual graphics of the arrows, sized in such a way that you can position them based on the host element (the item they are pointing to / referring to). Use real text so you can handle translations / reduce file size.
So you'll need a way to associate each tip with a control they are anchored too, and that will ensure that regardless of the screen size, the tip will appear in the correct place.
First of all, always give a try before putting questions anywhere because it makes you learn things on your own for long time.
The easiest step for you to do this is to ask your designer to create a complete image just like that & you just have to show it on top.
If you have to show that image in different translations, then you can ask your designer to provide you required translations images.
I have developed an app using iPhone 5 storyboard. The storyboard contains many views and I haven't used any constraints on any of the views.
What I am trying to achieve is to make the iPhone 5 storyboard expand to fit on iPhone 6 and 6+ without the need for any constraints, is this possible?
I have read many answer on SO already which lead me to believe that it is possible to get it to work but have not yet succeeded.
I don't have any launch images set, and I ticked the 'Use Size Classes' box for the storyboard.
Why is the storyboard not auto sizing for the iPhone 6. It's driving me crazy.
I hope you can help me,
thanks.
Have you tried using the Autoresizing feature? Uncheck the size classes box and you will see the option to use autoresizing under the measurements section to resize your storyboard for the 6 and 6plus.
http://i.stack.imgur.com/qM4Vu.png
You wont have to use size constraints since you're only making it for the iPhones
Click the "Use Auto Layout" checkbox shown below
Also here is a link to the size of the Launch images you should be using for the 6 and 6 plus.
One way but not recommended. Don't add splash screen for 6 and 6+
If you don't add the splash screen for 6 and 6+ OS will automatically scale all your UI.
The default auto resizing masks, which you probably have, have a fixed top and left margin and a fixed height and width. This would give you all the views packed into the top left corner as you are seeing - the flexibility is all in the right and bottom margins.
You're seriously better off using constraints (even adding the default constraints will probably get you most of the way there) but if you insist on sticking with auto resizing, you need to set fixed left and right margins and flexible width. Height is a bit more difficult, you have to decide which elements will fill the extra space and have flexible height on those.
To ensure that your app supports multiple screen sizes (instead of just scaling up the smaller interface) you should add a launch image .xib file which is much easier than using lots of images.
I have a UIView and a UITableView. I'm trying to align them in a way so they are sticked to each other. The UIView has a fixed height and I want the UITableView to consume the rest of the horizontal space.
I applied a set of constraints which got me pretty close to what I want to achieve but there's a problem that I don't know how to solve. The layout is OK in the portrait orientation but there's a gap between the two elements in the landscape mode. Please see the screenshots below.
Here are the constraint setups for the elements.
UITableView: (all constants are set to 0)
UIView: (all constants are set to 0 except for Height)
Thanks in advance.
I had the same issue of that space appearing above the top cell of a UITableView.
Like yourself, I looked into the constraints and the properties of the table, though the only way I could fix the issue was to delete the UITableView altogether and re-insert it.
Once re-inserted the gap was gone.
Application requires more than one window (Lets call A,B,C). Each window has more than one view (table views, image views as well as web view). Lets say window A has three views (x, y,z) and window B has three views (d,e,f). Application needs to display images of different size on orientation change.
I have achieved the same using gesture event listener and looping through windows for views and replacing the view with new images. The problem I have is when we navigate from one window to other and the orientation changes, the loading of view after looping goes for a toss. Is there a better way to achieve the same ?
Is there a method in titanium like following code to replace a view ?
var self=Ti.UI.currentWindow
var newView=Ti.UI.createImageView({image:'abc.png'})
self.replace(self.children[1],newView )
Unfortunately there is now replace method.
You need to remove the whole view and add it again but this can cause a wrong layout if you have more than one view on a same level. The implementation then depends on the layout which was set (vertical, horizontal, composite etc).
For example in vertical layout removing an item and simply add a new one would remove your specified item but appends the new one at the end since you can't specify in which order it should be added.
If you have a composite layout you can specify absolute positions but adding a new view causes a higher zIndex for this view so that it will hide views that were previously added at the same/similar position.
Why not simply change the image link ?
var self = Ti.UI.currentWindow;
self.children[1].image = 'bcd.png';
Well you could always lock the orientation of your window. But this isnt exactly good practice (especially for iOS).
Generally orientation changes are handled pretty well if you define the width and height of your views to be percentages or Ti.UI.FILL, if you have a composite layout. Check that you are not giving the views absolute coordinates as this could cause layout problems. If you have a vertical or horizontal layout you usually don't have to worry about orientation change, unless you did not nest your views in a main container correctly.
Prasad,
If this is about just ensuring that the images look good on different orientations,you can make use of the different folders provided by Titanium in the android/images folder.You can just make different images for each of the orientations and device sizes.For IOS you can change just the images on orientation change as you are already doing.
https://wiki.appcelerator.org/display/guides/Using+density-specific+resources+on+Android
If you are concernced about the layout there are couple of things you can do:
1.Give all the height or width values in percentages.This way all elements will be re sized once the orientation changes automatically.
2.On each window open check if the orientation is vertical or horizontal by default and accordingly set the image attribute of the imageView.
Ti.UI.orientation
This property will give you the orientation of the window by default.Values of this property could be this
Ti.UI.PORTRAIT
Ti.UI.UPSIDE_PORTRAIT
Ti.UI.LANDSCAPE_LEFT
Ti.UI.LANDSCAPE_RIGHT
Use "if else" and accordingly set the images.
Initially I was under the impression that it uses the table row slideup/down animations while inserting/deleting new rows but I doubt if it's doing that as it does it so fluidly even with thousands of items in the list (otherwise it would take a lot of time for the deletions/insertions to work).
Am I right in my assumption that it's simply attaching a new instance of the News list at the bottom of the screen, shrinking the above one while the one at the bottom expands to fill up space?
UPDATE:
Please see this video of what I mean: http://dl.dropbox.com/u/4960327/ReederAnim.mov
I can not tell you exactly how Silvio Rizzi made this, but as you see in the playback, a list view is added behind the shown list view, and the front list view fades out (.alpha = 0.0;) while the list view behind it expands its height per row.
When you desicate it frame by frame it becomes quite clear what he does, and it is really not that advanced. But I have to admit, with the white "milky" polished interface, it looks quite neat.
In addition, you can see that while animating, the background list view only renders the top 7 entries (hopefully calculated by dividing the view height with the average height of the cells shown) making the list view quick to load. Then afterwards, he can load an extended array of cells once you start scrolling, or in a background thread starting once the animation is complete.