Right now I have a table with a number of PDFs listed. From the table the user can select a PDF and it will be displayed in the view. Right now when I select and item from the table it should change the detailView's detailItem to the item in the row I selected, in addition change the variable i to the selected row number.
Here is what my DidSelectRowAtIndexPath method looks like:
- (void)tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
affirmaPDFViewController.detailItem = [NSString stringWithFormat:#"%#", [listOfPDF objectAtIndex:indexPath.row]];
affirmaPDFViewController.i = indexPath.row;
NSLog(#"%d", indexPath.row); //returns the proper value
NSLog(#"%#", [listOfPDF objectAtIndex:indexPath.row]); //returns the proper value
//NSLog(#"%d", affirmaPDFViewController.i); //DOES NOT return the proper value
//NSLog(#"%#", affirmaPDFViewController.detailItem); //DOES NOT return the proper value
}
for the first two NSLog's, they display the proper information, however when i check the last two they come out with affirmaPDFViewController.i = 0 and affirmaPDFViewController.detailItem = null. When i need the affirmaPDFViewController.i= indexPath.row, and affirmaPDFViewController.detailItem = the item in the row I selected.
Anyone know why they aren't coming out with the proper values?
Thanks in advance!
Your instance of affirmaPDFViewController is nil. Check the method where it's created, and remember you can set a breakpoint in the debugger to see if it's a valid object or not.
Related
I have a view based NSTable with ten or more rows and five columns. To populate data for this table, I have a dictionary of 5 arrays. So each dictionary object is for each column.
Now I need to get information when I click on any cell. I am using tableViewSelectionDidChange delegate to get notified on cell selection. Using this I can get only the [myTableView selectedRow] to get to know the row selected. How can I know which column was the row in. For ex: I select/click on 5th row in 3rd column. Now I need to know which column was it clicked on so that I can extract required object from the dictionary.
Any clues ?
You may override the mouseDown: event of your tableView and get the clicked column as:
- (void)mouseDown:(NSEvent *)theEvent
{
NSPoint globalLocation = [theEvent locationInWindow];
NSPoint localLocation = [self convertPoint:globalLocation fromView:nil];
NSInteger clickedCol = [self columnAtPoint:localLocation];
[super mouseDown:theEvent];
}
or you may use NSTableView delegate method:
tableView:didClickTableColumn:
For reference check:
https://developer.apple.com/library/mac/documentation/Cocoa/Reference/NSTableViewDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/NSTableViewDelegate/tableView:didClickTableColumn:
I am using a UIPickerView and currently their is only a single object in it. How can I display that single object on label.
It has this weird property that when we use pickerView the data is not set selected by default.Once we choose another object or roll it, then only any particular object is selected. Hence if only one object is their in pickerView. It does not count as selected even though when you tap on that single object.
I tried a lot but found that if their are more than one object then only you can display the selected object on label but not if their is only one object.
You need to make a code that is triggered when the UIPickerView changes, like this:
#pragma
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
//Action that triggers following code:
{
NSString *nameString = [nameOnMutubaleArrayYouWannaGetDataFrom objectAtIndex:[picker selectedRowInComponent:0]]; //Or 1 if u have multiple rows
NSString *labelString = [[NSString alloc]initWithFormat:
#" %# ", nameString];
labelOutput.text = labelString;
Hope this helps.
I have an NSTableView where I would like to be notified if the user clicks in a column "ClickMe". I linked the entire table view to a method which can extract the clickedColumn:, but I get an absolute number and not a reference to the "ClickMe" column (which may have been moved to another place).
I could of course program my own search algorithm to see if column X is actually the "Clickme" column, but that would not be very elegant. Is there a way to identify columns properly, and to receive that ID programmatically?
I found a way to do my own search in a fairly fast way, but I still have a feeling I am putting too much effort in this:
First, set the Identifier of the desired column in the Interface Builder to "ClickMeColumn". Then:
NSInteger cmColumn = [tableView columnWithIdentifier:#"ClickMeColumn"];
if ( [tableView clickedColumn] == cmColumn )
NSLog(#"Clicked me!");
I am looking for something along the lines of [tableView clickedColumnIdentifier].
What about querying NSTableView's columnAtPoint: in your table views mouseDown: or mouseUp: method?
Use any of the methods below. Called by the tableView's delegate on selection. You can extract the identifier and the title string from the relevant tableColumn.
- (void)tableView:(NSTableView *)tableView didClickTableColumn:(NSTableColumn *)tableColumn {
NSLog(#"tableView:didClickTableColumn: %#, titleString: %#", [tableColumn identifier], [[tableColumn headerCell] stringValue]);
}
- (void)tableView:(NSTableView *)tableView mouseDownInHeaderOfTableColumn:(NSTableColumn *)tableColumn {
NSLog(#"tableView:mouseDownInHeaderOfTableColumn: %#, titleString: %#", [tableColumn identifier], [[tableColumn headerCell] stringValue]);
}
From: https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSTableView_Class
I have two coloumn in NSTableView as Name and Salary with 5-10 values. I want to sort these coloumn after click on header of both the column. There is lots of data present in Internet but I am not able to use these. Please help me to do this in cocoa.
Thanks in advance and appreciate any help.
Each table column has a method setSortDescriptorPrototype
Sort descriptors are ways of telling the array how to sort itself (ascending, descending, ignoring case etc.)
Iterate over each of the columns you want as sortable and call this method on each of those columns, and pass the required sort descriptor (In my case I'll be using the column identifier)
for (NSTableColumn *tableColumn in tableView.tableColumns ) {
NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:tableColumn.identifier ascending:YES selector:#selector(compare:)];
[tableColumn setSortDescriptorPrototype:sortDescriptor];
}
After writing this piece of initialization code, NSTableViewDataSource has a method - (void)tableView:(NSTableView *)aTableView sortDescriptorsDidChange:(NSArray *)oldDescriptors that notifies you whenever a sort descriptor is changed, implement this method in the data source and send a message to the data array to sort itself
- (void)tableView:(NSTableView *)aTableView sortDescriptorsDidChange:(NSArray *)oldDescriptors
{
self.data = [self.data sortedArrayUsingDescriptors:sortDescriptors];
[aTableView reloadData];
}
This method will get fired each time a column header is clicked, and NSTableColumn shows a nice little triangle showing the sorting order.
I stumbled upon this question while looking for the easiest way of implementing something similar. Although the original question is old, I hope someone finds my answer useful! Please note that I am using Xcode 5.1.1
Ok so to do this you need to:
select the actual column you want to sort in your table.
In your Attributes Inspector you need to fill in two fields: Sort Key, and Selector.
In the Sort Key field, you need to enter the value of your Identifier. The value of your Identifier is located in your Identity Inspector.
In the Selector field you need to enter a suitable selector method based on the object type in the column. The default method is; compare:
Based on the Table View Programming Guide for Mac. The compare: method works with NSString, NSDate, and NSNumber objects. If your table column contains only strings, you may want to consider using the caseInsensitiveCompare: method if case sensitivity is unimportant. However, consider replacing these method signatures with the localizedCompare: or localizedCaseInsensitiveCompare: methods to take into the account the user’s language requirements.
Finally, you need to declare the tableView:sortDescriptorsDidChange: method in your Table View Controller in the format shown below:
-(void)tableView:(NSTableView *)mtableView sortDescriptorsDidChange:(NSArray *)oldDescriptors
{
[listArray sortUsingDescriptors: [mtableView sortDescriptors]];
[tableView reloadData];
}
Just had lately the same issue to get tableView sorted.
My approach :
bind your sortDescriptors to tableview's arrayController
bind tableview's sortDescriptors to Arraycontroller's sort descriptor
perform the settings in attribute inspector (see Tosin's answer above)
Worked perfect for me. No need to set prototypes for columns or something else.
Thanks very much ,It is usefullly for my question.
my code like this
First, set unique values in the XIB interface，like name...
- (void)viewDidLoad {
[super viewDidLoad];
self.itemTableView.dataSource = self;
self.itemTableView.delegate = self;
self.itemTableView.selectionHighlightStyle = NSTableViewSelectionHighlightStyleRegular;
self.itemTableView.usesAlternatingRowBackgroundColors = YES;
for (NSTableColumn *tableColumn in self.itemTableView.tableColumns ) {
NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:tableColumn.identifier ascending:NO selector:#selector(compare:)];
[tableColumn setSortDescriptorPrototype:sortDescriptor];
}
}
-(void)tableView:(NSTableView *)tableView sortDescriptorsDidChange:(NSArray<NSSortDescriptor *> *)oldDescriptors{
NSLog(#"sortDescriptorsDidChange：%#",oldDescriptors);
[self.itemArr sortUsingDescriptors:[tableView sortDescriptors]];
[self.itemTableView reloadData];
}
So I admit to being a total noob to cocoa, so I offer a noob question. I'm probably just missing the dumb obvious somewhere but i just cant seem to get my table to populate data.
I'm following the table view playground example but everytime i try to mimic the Basic TableView Window the first row becomes the height of the number of rows i added (at least thats what it looks like. Here is my code:
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(int)row
{
NSString *identifier = [tableColumn identifier];
if ([identifier isEqualToString:#"filename"]) {
// We pass us as the owner so we can setup target/actions into this main controller object
NSTableCellView *cellView = [fileBrowserTable makeViewWithIdentifier:identifier owner:self];
// Then setup properties on the cellView based on the column
cellView.textField.stringValue = [fileList filenameAtIndex:row];
cellView.imageView.objectValue = [[NSWorkspace sharedWorkspace] iconForFile:[fileList fullPathAtIndex:row]];
return cellView;
}
else if ([identifier isEqualToString:#"path"]) {
NSTextField *textField = [fileBrowserTable makeViewWithIdentifier:identifier owner:self];
textField.objectValue = [fileList pathAtIndex:row];
return textField;
}
else if ([identifier isEqualToString:#"preview"]) {
NSTextField *textField = [fileBrowserTable makeViewWithIdentifier:identifier owner:self];
textField.objectValue = [fileList previewAtIndex:row];
return textField;
}
return nil;
}
I think its worth mentioning that when using a the old school text field cell, I have no problems displaying data (of course the above code is different in that case) so im positive sure its not a problem with my data structure that holds the values. I have also set the correct delegate and data source
The cell using the 'filename' identifier uses the 'image and text table view cell' while the others use just a 'text table cell view'. Neither of them work so i'm guessing something is wrong with how I set my table up. But when comparing my table with that of the example, it's just a spitting reflection (minus identifiers file names).
One thing that I notice that I can't quite figure out is that the example says:
The NSTableView has two reuse identifier assocations: "MainCell" and "SizeCell" are both associated with the nib ATBasicTableViewCells.xib
I don't really understand this statement. However that being said, the example doesn't contain any ATBasicTableViewCells.xib nor does it have any associations with it (code or ib) that I can find.
Have you tried to set the rowSizeStyle of the NSTableView to NSTableViewRowSizeStyleCustom?
[UPDATE] Re-reading your question, it's not clear for me what your problem is. The solution I have given is related to problems with the size of each cell which is not taken into account unless the rowSizeStyle is set to custom.