I'm building an app for the iPhone and I need to drag and drop allot of different objects.
I have found allot of separate ways to drag and drop UIImageViews, UIButtons etc. But I was wondering if there is a universal way to program any object to able to drag and drop?
You may want to consider using one or more UIGestureRecognizers for each view. Here's a reference to the docs.
http://developer.apple.com/library/ios/#DOCUMENTATION/UIKit/Reference/UIGestureRecognizer_Class/Reference/Reference.html
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I am building an app which enables user to drag a UIView onto another. Currently I have the implementation as a UIScrollView but that does not give me the best experience as to achieve an experience like Apple's drag and drop requires handling of many cases ( including edge cases).
I am curious if this can be done using a UICollectionView. I am looking to drag cells onto another cells after which the cells contents merge and the source cell is removed.
Any idea/ suggestion would be appreciated. I am not sure if adding what I have is neccessary but if needed I can certainly add the code which I have.
Yes, using a collectionView would be a good choice for scrolling and drag/drop. There are many built in methods that support drag and drop.
https://developer.apple.com/documentation/uikit/views_and_controls/collection_views/supporting_drag_and_drop_in_collection_views
I am using CHTCollectionViewWaterfallLayout as the layout for my collectionView, since my cells do all have different sizes. But I would also like to implement drag & drop in my collectionView. The libraries I have found would not allow me to implement both at the same time. Is there any way to do this?
Thanks
I found a way to do it, I used one of the existing Drag 'n Drop libraries and made sure it inherited from the CHTCollectionView instead of the UICollectionViewFlowLayout, this worked pretty good! Still some errors to work out, but the beginning is there
For iOS 7 and iOS 8, we're implementing these things that look like drop-downs, but each just launch a modal window.
What makes more sense, using 3 UIButtons, 3 UITableViews with 1 row, or something else? In the past, there would be more than one of these all lined up, so I would put them in a UITableView and set the accessoryView of the UITableViewCell. Using the cell was nice, but three UITableViews seem like overkill here and a maintenance hassel.
The closest post I found regarding this was one about using an UITableViewCell outside of UITableView
What would make the most sense is to follow the iOS design guidelines. Instead of trying to create custom dropdown menus (or worse: showing a drop down menu, but displaying a modal view when the user is expecting a drop down view), that UI could be replaced with 1 UITableView that has 3 UITableViewCells in it. The text on each cell would be the name of the setting to be changed and selecting the cell would push segue to the next page. This will give the app a uniform iOS UX; allowing users to know exactly how to use your app because it works similarly to other apps on their phone. Check out the Settings app on the simulator to see what I am describing.
I don't see any advantage to using a UITableView or a UITableViewCell. I think this is clearly a case for three UIButtons. You can set constraints to keep them nice and clean. One cool thing that might be worth investigating is using a unicode character for the downward arrow. That way you could have the tap feedback on the whole "thing" as you called it.
When I need to create sort of dropdown menus, I usually take advantages from UITableView, one above all is when you will need to add one or more selections in the dropdown you just need to change the data model.
UITableViewCells are easily customizable that means that you can create almost everything you want.
I think that your design doesn't adapt well to a mobile application, those kind of menu are more web style, with 3 buttons and a UIPickerView you can really improve the user experience and also adapt in a really easy way on the ipad embedding the picker in a UIPopoverController.
as i agree with #keithbhunter, but still if you want then may this links will help you.
http://code4app.net/ios/DXPopover/54741ca3e24741c56db03ca0
https://www.cocoacontrols.com/controls/kxmenu
https://www.cocoacontrols.com/controls/nidropdown
Here is an approximate view for iOS 8 on iPad.
http://i.stack.imgur.com/BQKuD.jpg
As I understand, the only way to simulate these columns is to use a lot of iCarousel instances. But there some problems with dragging which may involve from a view from one carousel instance up to some carousel instances at once.
Could you describe a list of actions I need to perform for such dragging animation? Even if it will be without of code
Finally I've understood that if I use iCarousel then I must implement drag and drop fully manually. So I take HMLauncherView which vice versa has somehow implemented drag and drop but by default supports only grid of views. So now I try to add to it some functionality which is similar to iCarousel
I'm writing a app that contains quite a bit of input fields for collecting data.
and im wondering what are some good methods to display these kind of input fields, if there are too many to fit on a screen? so something like the add contact screen... where u can scroll down and there are fields there
my initial idea is to put them in a scroll view and then i can scroll through them, is there a tutorial to do this? it seems like the scroll view is more for dynamically displaying data like a text view, and not for static forms like i was describing.
if anyone has any different methods for doing this please post.
UITableview will match perfectly for what you need.
My friend wrote this which is a container view that automatically helps with moving fields out of the way of the keyboard - It will certainly save you some time if you don't want to use a UITableView:
https://github.com/mackross/GTKeyboardHelper
The other way as H2CO3 suggested is to use a UITableView. If it is a UITableViewController, then you get the moving out of the keyboards way automatically. You could build custom table view cells that are styled to have a prompt and a UITextField for input. You can also set the selectionStyle to UITableViewCellSelectionStyleNone to prevent these cells from highlighting when selected.
I think the third way is to do this with a UINavigationController (or a UIPageControl) and build a kind of wizard, where you go through various pages of related data. This might be the neatest way depending on how many fields you have and if you can group data into common sets (e.g. personal information, work information etc)
I had the same problem and found GTKeyboardHelper to be an easy way out.
After drag and drop the framework in your project, include the header file.
Download and open the example project, then drag the "Keyboard Helper" object from the objects section in the xib to the objects section in your project's interface builder.
Drag and drop all your views to be children of the "Keyboard Helper".