I am working on Accessibility. I am using XIB file and I enabled all the views which need to be read by voiceover.Now the issue is first cell in tableview is reading twice by the voiceover. That happens only first time. I have multiple cells in tableview. But Voiceover reading first cell that too first time. If I swipe to next cells and come to the first cell again it reads only once.
Its very Inconsistent behavior. I could not able to find out the problem. I tried by passing nil values to both accessibilityLabel and accessibilityValue of the cells. But no impact on the Issue.When I disable the accessibility from the XIB file and enable it by programmatically also, but no Use.
Any Suggestions on this would be helpful.
You positing the UIAccessbilitypostnotification for the table with (Screenchange notification), will leads to read twice.
Dont post screenchange notification for Table view. UIKit will handle that by default.
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 am using an NSFetchedResultsController with a data source that is updated in the background. This is working really well - as new objects are saved to the managed context they appear in the UITableView. However, this leads to the problem I'm having.
When you swipe to delete a cell, putting the cell into edit mode, if at that point an object is created which pushes the cell down in the table view, the position which the cell occupied will be in edit mode, and not the cell you selected. Basically, the UITableView retains the edit mode on the original index path, without adjusting for the movement of cells.
Is there any way to get around this? Thus far everything I've tried has lead to a dead end.
reminds me of a problem i had when reordering uitableview cells.Look at 'Responding to changes' in NSFetchedResultsController reference. It shows a way to temporarily disable the change notification. I used it for reordering, maybe you can get inspiration from it to solve your problem too.
kind regards
y
I have a UITableView with around 10 cells, placed in a view controller in the middle of a program. When I run the program, the table view shows. But if I start quickly selecting random UITableViewCells, the program crashes. I don't know how this is possible because I can do it in another application with a UITableView and nothing interesting happens. How????
EDIT: Nevermind. I fixed it by removing some unnecessary statements.
Check with your coding.May be you have done some silly mistake at the time assigning text to the cells are some where else. Look into your coding.
For your reference you can refer this link.
http://iphonesdevsdk.blogspot.com/2011/04/uitableview.html
I have a program with a NSOutlineView (that supports single selection only) from which I'd like to be able to drag elements. These elements should either be received as text or files: for instance, dropping the item on a TextEdit window should put text, but dropping the item on the Finder should create a file. I don't want anything to be dropped over my outline view, even it it comes from itself. This seems easy enough, but for some reason, I can't get it to work.
I checked the NSOutlineView drag and drop example from Apple, and I came to implement the following methods (plus a few definitely unrelated ones):
-(BOOL)outlineView:shouldSelectItem: // I don't expect to drag unselectable items
-(NSArray*)outlineView:namesOfPromisedFilesDroppedAtDestination:forDraggedItems:
-(BOOL)outlineView:writeItems:toPasteboard:
However, when I try to drag an item from my outline view, nothing happens. Instead, it just changes the selection following the cursor.
I've put breakpoints in the two last methods, and they never get called, so their implementation is not the immediate issue.
I must be missing something really obvious here.
Also, this is not (yet) a problem, but how am I supposed to provide contents to my promised files?
I was being stupid and I implemented the methods in the delegate instead of the data source (the two are distinct in my app). Problem solved!
Are you using a custom table view cell? The result of NSCell's hitTestForEvent:inRect:ofView: determines whether a dragging operation can be initiated. It also determines whether your outlineView:writeItems:toPasteboard: should be called.
This method should return NSCellHitContentArea to initiate a drag, or NSCellHitTrackableArea to extend or change the selection.
A standard text cell returns NSCellHitContentArea when you click on the actual text of the cell, and NSCellHitTrackableArea when you click outside of the text. This produces the drag behavior you see in Finder's table view.
You can override this method and always return NSCellHitContentArea if you want all areas of the cell to initiate a drag operation.
See Hit Testing for more information.
I'm having trouble creating a mouseover function with an NSTableView. The idea is that (if the feature is selected in prefs) placing the mouse pointer above a particular row in an NSTabelView will display a small popup window with additional information regarding the entry in that particular row. The effect should not be immediate (as e.g. highliting a button when rolling over it), but come with a delay of a few seconds.
So far, I have implemented this functionality using the tooltip delegate method, but this does not allow for customization of the window and does not work well (layout wise) if more than 1-3 rows of info need to be displayed.
In Hillegass' book it is suggested that one uses the mouseEntered/mouseExited methods for rollovers, but as far as I can tell this works with pre-defined areas of a window and not rows in a table view.
Does anyone have any suggestions?
Gregor Tomasevic,
Sweden
You're on the right track with -mouseEntered: and -mouseExited:.
Look into NSView's -addTrackingRect:owner:userData:assumeInside: and -removeTrackingRect: methods. You can either set up your tableView to create trackingRects for every row that's in there whenever the contents of the tableView change, or alternatively, set up/update one tracking area on the entire tableView whenever -tile or another layout related method is called.