Is it possible to use a UITableView to be able to enter a value into a database's field.
For example, if I was to have a UITableView pointing to a field within a database and if I wanted to enter a new entry into the database - tap on the UITableView Cell that would then allow keyboard input into the cell which ultimately end up being a new record in the database??
This is possible, but if something is possible doesn't mean you should be doing so.
You might ask why?
Well! you are trying to input data from view directly to database, this is a very bad practice. There are many reason for it being bad, the major is efficiency and security reasons.
You should consider using MVC pattern.
Now since its completely possible, I will explain the idea on how to do it and conclude with links that will have real code examples.
In tableView:cellForRowAtIndexPath:
add a TextField with tag (to get the reference back in future) and add it to contentView of the cell and have it hidden.
Now in tableView:didSelectRowAtIndexPath: make the cells editing property to YES.
Then, in tableView:willBeginEditingRowAtIndexPath:
get the reference to the textfield in contentview using viewWithTag: method and hide the textLabela and unhide the textfield.
In textfield's delegate textFieldDidEndEditing: make cell's editing property as no (yea, you need to keep the reference) unhide the textlabel and hide textfield.
In tableView:didEndEditingRowAtIndexPath: write methods which will commit the changes to your db.
Below are list of links which will get you code examples:
Having a UITextField in a UITableViewCell
Accessing UITextField in a custom UITableViewCell
iOS Database Tutorial
There are no examples for your requirement 'coz it bit bad way of doing things.
Yes its possible....
You can use delegate methods to take data form you cells textfield to your parent view controller and then save data in database.
Related
So if I have an NSView based tableview and inside the views are NSTextViews which are non-editable but selectable...
how can I get that nice functionality of command-A selects all the text? I don't mean row selection. I have row selection disabled for the tableview. I mean highlighting the text in blue so you can copy it to your clipboard. But not just 1 NSTextView's text from one row, all of them from all the rows.
And in addition to command-A click and drag should do this too. But out of the box it seems I can only select one row's text. Here is video showing problem:
https://dl.dropboxusercontent.com/u/2510380/table.mov
(i keep clicking and dragging but can't highlight text on the next row)
here are two mac apps (skype and gabble) that do this:
https://dl.dropboxusercontent.com/u/2510380/skype.mov
and
https://dl.dropboxusercontent.com/u/2510380/gabble.mov
Assuming they are NOT using WebViews with just HTML inside, how do you get this control over the clipboard? i.e. in Skype you select the text and only the conversation is highlighted, not the timestamp of each message. Also the text copied to the clipboard is formatted very nicely. Can you point me in the right direction to reverse engineer skype?
Unfortunately there's no way to do this easily. This is because only ONE control can be the first responder at a time. This means that, though you can have selection in multiple text views, there are several problems:
Only one text view's text will actually be highlighted with the "live" highlight color; the others will have the gray highlight of non-focused controls.
Copy commands will only apply to the first responder text view.
Drag session starts will be initiated from the control the mouse was actually pointing at (irrespective of first responder) and will only drag that control's text.
In a view-based table view, the controls may not even "exist" for a row not currently displayed, so it'll never get the message unless you forcibly create each row, which could be costly for a large table.
Knowing all this, you might be able to "fake it" by having your controller be complicit in a text view and table view subclass's special handling of a select-all message when it's first responder. On receiving this message, the text view subclass can call super then notify the controller (to get its default behavior AND to let you know it happened), at which point the controller can turn around and send the command to all (existing) text views. Highlighting can be spoofed by overriding the text view's drawing and a drag initiation could defer to a delegate (the controller), which would handle writing ALL the strings from your model to the pasteboard (not even touching the text views in possibly-nonexistent row views). The table view subclass would simply pass the same select-all message to the controller without calling super (and even forcibly making sure nothing is selected before returning for good measure).
I hope this helps. If I've forgotten any of your requirements, let me know.
Try like this:-
First create button programatically then write this code after you create button and also write this code in your load method or awakefromnib method.
NSButton *Buttn=// alloc initwithframe;
[Buttn setKeyEquivalentModifierMask:
NSCommandKeyMask];
[Buttn setKeyEquivalent:#"A"];
[Buttn
setAction:#selector(yourmeth:)];
[Buttn setTarget:self];
// now when you press cmd a write
below code in action method
- (void)selectRowIndexes:(NSIndexSet
*)indexes byExtendingSelection:
(BOOL)extend
I want to make a custom text selection in my table view.
I found this awesome answer on how to set the colors, fonts, etc. of the cells.
However, there is one issue.
It does not work for group rows. I see that the method gets invoked, but I think the style gets overwritten somewhere in either the NSTableCellView, or in the NSTableView class.
How can I fix this?
EDIT
It's a view based NSTableView
I am newbie for iPhone application. For storing data, I am following this tutorial.
I understand how to save data and retrieve the same.
What I am wanted to do is instead of another UITableViewController (first screen in storyboard, where we have list), I will drag a UITableView and show list of items there instead of showing in another screen.
Any idea/ suggestion how to get this done?
Any hints would be greatfull.
What I feel is, I would need to add UITableView. Add delegate and dataSource method on it and add a method where I will have all data shown in UITableView.
Edit 1
What I want is ONLY ONE SCREEN. In the link that I have provided, it is second screen.
That should work fine. But make sure you also have done a
[tableview reloadData];
after you've changed the data in your table view data source delegate.
What I am wanted to do is instead of another UITableViewController (first screen in storyboard, where we have list), I will drag a UITableView and show list of items there instead of showing in another screen.
Why you want to do this way?
UX will not be at best.
What I feel is, I would need to add UITableView. Add delegate and dataSource method on it and add a method where I will have all data shown in UITableView.
Even if you want to do, yes you need to set delegate and datasource methods.
What is the Right Way to Implement This?
For example, say I created an XIB file with a button in it. Say a button on that custom controller get pressed, how do the program knows which "row" of the UITableView get pressed? Does each row has their own UITableViewCell Controller?
There has to be one right way to design this.
You can follow the tutorial for custom cells -
http://cocoawithlove.com/2009/04/easy-custom-uitableview-drawing.html
You are asking about two different controls (buttons and cells), but anyway both have a similar way to "communicate" with the controller. With the button's tag and the cell's index, you have enough to be able to manage the use of these controls.
I'm customizing a tableviewcell which is still very hard to me.
After reading apple's guide, I'm customizing my cells by loading them from a nib file, and managing them programmatically.
so instead of creating two different types of nib files (tableviewcells) one with textfield, and another with pickerview.
I'm doing a hybrid cell. i.e. In my nib file, i'm adding a UILabel, UItextField, UIPickerView.
Now on the 'cellForRowAtIndexPath' for the tableview (after i've bound each cell to the nibfile)
i want to be able to programmatically use the pickerView OR the textfield.
Now there's no 'visible' property to use in order to show one and hides the other.
So what's the best approach here.
I'm a bit new to cocoa , and the framework is not giving me many options.
So for example if indexpath is 0.1 i want it to be a pickerViewCell.
and if indexPath is 0.2 , i want it to be a textfieldCell.
So if indexpath is 0.1? what should i do?
should i dispose of the textfield? change its coordinates to somewhere that can never be viewable? disable it? what?
and if my approach is wrong and not recommended, what is the recommended way?
should i go back and remove the pickerView from the nib, and create another nib file with only label and pickerview? and upon loading decide which one to load?
Thanks
View visibility is controlled by hidden property (that is - the opposite of visible) - you can use it in your case