I am following Chapter 5 in O'Reilly Learning iPhone Programming.
When I launch the app in Xcode, the list will scroll straight away to the bottom. When I try to drag the tableview upwards, it will go back to the last row when I release my mouse.
Unfortunately I am unable to post the codes since it has many sections.
Anyone has a clue what code might have caused this problem?
It is likely that the UITableView is actually extending off the visible screen. Use the debugger to check at runtime the frame of the table view. It is not scrolling because it thinks the content is fitting. Without seeing the code though, this is just an educated guess.
I grabbed the sample code for Chapter 5 from here: http://www.learningiphoneprogramming.com/pages/samplecode.html and I'm unable to duplicate your problem. Are you sure you didn't change any of the code? What is your Base SDK?
Related
Since I am using Xcode 11 I am having problems with the Safe Area. My App is an ArKit- App that uses an ARSCNView. after upgrading to Xcode 11 the safe Are doesn't allow me to display it full screen anymore. Actually all the views in all ViewControllers can't be displayed in full screen. I really don't know where to start. Did anyone experience this kind of behavior?
Thanks!
Edit:
I unchecked all the necessary boxes I hope. The behavior I still get is this:
Storyboard Main
Inspector
Live View
There seems to be a view underneath. But I never added one and the inspector doesn't show. This changed with xcode11.
I just found out what happened to my ViewControllers. I am checking for internet connection with a LaunchViewController. The segue from this controller to the next one did not specify "full screen". I still don't know why I have to explicitly tell the segue to do so in Xcode 11. But in the end that solved my problem.
Thank you
The Safe Area is used as a reference for constraints for views and objects that you want the user to be able to interact with. It is used as a guide during the layout of objects on the screen. If you want to take advantage of the entire screen, constrain your views to the superview (basically the main view of the view controller). This is handy for displaying things like backgrounds on the entire view. Take a look at Apple's human interface guidelines for more info:
Apple's Human Interface Guidelines: Adaptivity and Layout
Similar Question:
iPhone X - Safe Area does not achieve full-screen experience?
I have seen a few grids made with UITableView but I don't really like how close together each cell is to the other. If there is a way of creating a grid system like the home screen on an iphone (the screen after it is unlocked) if would be great. I don't need an exact solution but a point in the right direction, maybe a set of libraries to look through would be great. I am running xcode 4.4.1
Thanks!
The key is UIScrollView has a paging mode (since could have more buttons than fit in the view). It's covered here's in Apple ocs:
http://developer.apple.com/library/ios/#documentation/WindowsViews/Conceptual/UIScrollView_pg/ScrollViewPagingMode/ScrollViewPagingMode.html
If you use that, each 'page' would have n buttons/views that when clicked would call a protocol/delegate call back for the consumer with the data to handle and it would evenly layout the UIView/buttons across that page view. Contact me if you want my sample.
You probably don't want to require iOS6 as a minimum requirement but if you do, you can do as H2CO3 suggested in the comment and us UICollectionview. Here's a tutorial: http://www.raywenderlich.com/22324/beginning-uicollectionview-in-ios-6-part-12
There's also some open source launchers that you can look into their code. Here's some (I'm sure there's more).
http://www.cocoacontrols.com/platforms/ios/controls/sespringboard
Code is at: https://github.com/sarperdag/SESpringBoard
Also: http://www.cocoacontrols.com/platforms/ios/controls/openspringboard
Use UICollectionView. You can create grid type views using that. It is available in iOS 6.
If you can target iOS 6+, use UICollectionView. It's one of the best new things in iOS for years and it will be as important as UITableView.
The layout you're asking for is only a few lines of code.
NSHipster has a good explanation of UICollectionViews and Ray Wenderlich has a good tutorial.
(There's lots of example code out there, but here's a very simple example project I did recently for another question involving UICollectionViews)
I have a NavigationController that stacks UIViewcontrollers that have UITableView among other UI elmeents. The tables I use are actually custom tables that use custom cell views. With this arrangement those tables don't show scrollbars of any kind even though I have configured in IB the Shows Vertical Scrollers to show them.
I've tried several ways of debugging this without success. If I print to console the value of this property (showsVerticalScrollers), it prints 1, so the property is properly set, and no, my table is not wider than its parent view, actually it's way more narrow than its parent view.
Are there reasons why a table won't show it's scrolls?... btw, this happens in iOS5 running in simulator. I'm using xcode 4.2 with SLeopard. I don't have access to an iPad to test it in the hardware but other tables I have in the same project, show their scroll bars without a problem.
EDIT
thanks for the answer... I did one last test and found that one of the causes for not showing a scrollbar is the number of elements shown in the table, when they fit in it without the need to actually scroll. Say if you have a table with 1 row and the vertical size of the table is too big for just one row?, then iOS won't show the scrollbar when bouncing.
It's hard to provide a possible solution without seeing any code, but the advice I can offer is to update your code to the bare minimum needed code to implement a UITableView and see if scrolling works, if it does, add in functionality in small increments, testing the scrolling with each new code addition till you reach the point that scrolling breaks. Incremental testing in this fashion helps to avoid issues like this where you are unable to effectively debug your application.
I'm an iOS developer looking for a solution to a tricky problem.
I need to create a grid view/ mosaic view to layout cells of different sizes (both width and height).
I basically need the functionality of a GMGridView, with horizontal scrolling/paging, the ability to edit, and drag cells to new locations, thus rearranging the entire grid view. I've looked at all of the current open source grid views out there, and found none with variable sized cells.
One solution I have thought about is 2 tableviews both rotated for the horizontal scrolling, and then intercept some UITableView scrolling methods, to then scroll the other tableview together. This is not ideal, as I will be unable to move a cell from one view to another, and I'm not sure how happy apple will be about it.
I also know of some possible (confidential?) support for this coming in the next version of iOS, but would like to keep my app supporting previous versions of iOS.
Thanks for any insight you can provide.
I realize this post is kind of old, but here is a list of relevant projects: *https://github.com/betzerra/MosaicUI
*https://github.com/betzerra/MosaicLayout
GridViews on iOS are a pain. Fortunately Apple is coming up with UICollectionViews that are optimized to build grids. This is coming in iOS6 and it's still under NDA so check out the documentation on Apple's website for more information.
The question you need to solve now is whether you want iOS5 retro-compatibility or not
i m new to iphone development
i want to create a view like this..
1.home screen contains
a. a navigation bar
b.a uiimageview
c.a toolbar(with 4 buttons)
2.new view contains
a.navigation bar with back button which leads to home screen.
b.a UITableView.
3.another table view
with navigation bar leads back to (2nd view)
note i want to load new view with the tool bar button.
That's excellent. Thanks for the update! Keep us informed on how you're doing with that.
Actually, it would be a disservice to you for us to write your code for you. Why don't you try looking at Apple's sample code on the iPhone Dev Center? It'll answer your question.
You can come back here and post code that you've tried that isn't working.
Probably not the answer you want, but I'm pretty sure you'll benefit more from actually researching the question and trying it out on your own.
Following up on Jordan's answer, the place you want to start is Getting Started w/ iPhone OS. For the type of code you're talking about, you should then investigate the View Controller Programming Guide. When you've gone through the samples and start having trouble with your own code, the Cocoa/iPhone crowd here at Stack Overflow is incredibly helpful. But a statement of program requirements isn't an SO question.