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.
Related
I have an NSPopupButton whose content is bound to an NSArray, let’s say the array is
#[
#"Option 1",
#"Option 2"
];
Its selected object is bound to User Defaults Controller, and is written to a preference file by the user defaults system.
In my code I check whether the preference is set to #"Option 1" or not, and perform actions accordingly.
This all worked well (though I did feel a little uneasy checking for what is essentially a UI value, but whatever...) until I needed to localize.
Because the value is the label, I’m having an issue.
If my user is in France, his preferences file will say #"L’option 1", which is not equal to #"Option 1". I need to abstract the presentation from the meaning and it's proving pretty difficult.
I split up the binding into two arrays, let's call them values and labels.
Let’s say they look like this:
values = #[
#"option_1",
#"option_2"
];
labels = #[
NSLocalizedString(#"Option 1", nil),
NSLocalizedString(#"Option 2", nil)
];
I’ve bound the NSPopUpButton’s Content binding to values and its Content Values binding to labels. However, the popup list is showing option_1 and option_2, it does not seem to want to use the labels array to label the items in the popup button.
How do I get the NSPopUpButton to use values internally and store that in the preferences file, but display labels to the user?
It doesn’t have to be architected this way, if you can think of a better solution. The point is I want to store and check one value, and have that value associated with a label that gets localized appropriately.
Cocoa bindings work very well with value transformers, because you can apply them directly in the bindings window, for example
#implementation LocalizeTransformer
+ (Class)transformedValueClass
{
return [NSArray class];
}
+ (BOOL)allowsReverseTransformation
{
return NO;
}
- (id)transformedValue:(id)value {
if (![value isKindOfClass:[NSArray class]]) return nil;
NSMutableArray *output = [NSMutableArray arrayWithCapacity:[value count]];
for (NSString *string in value) {
[output addObject:NSLocalizedString(string, nil)];
}
return [output copy];
}
#end
you have to register the transformer in awakeFromNib or better in +initialize
NSValueTransformer *localizeTransformer = [[LocalizeTransformer alloc] init];
[NSValueTransformer setValueTransformer:localizeTransformer
forName:#"LocalizeTransformer"];
then it appears in the popup menu of value transformers
Bind Selected Tag to your User Defaults Controller instead of Selected Object.
If the NSPopupButton choices are fixed add the NSMenuItems in Interface Builder and set their Tags. Otherwise bind an array of NSMenuItem, again with proper Tags.
Selected Index would also work but only until you change the order.
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];
}
I'm trying to read a reference to an image file out of a plist and make the image display in a detail view. although I can do this for my table view layout, I'm having trouble doing this with my DetailViewController nib file. I'm hoping someone can help me fix the problem and explain to me where I'm going wrong. What follows with the code is my explanation of what I THINK I'm doing. If you could explain to me what I'm doing wrong as much as show me what I should be doing, I'd really appreciate it. I'm trying to learn as much as trying to make things work.
I think the problem resides in two places. The first is my didSelectRowAtIndexPath method:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//Get the dictionary of the selected data source.
NSDictionary *dictionary = [[[self.localSites objectAtIndex:indexPath.section]objectForKey:#"rowData"] objectAtIndex:indexPath.row];
TableDetailViewController *controller = [[TableDetailViewController alloc] initWithNibName:#"TableDetailViewController" bundle:[NSBundle mainBundle]];
controller.title = [dictionary objectForKey:#"Location"];
controller.dText = [dictionary objectForKey:#"details"];
// THIS IS WHERE THE PROBLEM IS
NSString *tiny = [dictionary objectForKey:#"thumb"];
controller.mainImage = [UIImage imageNamed:tiny];
[self.navigationController pushViewController:controller animated:YES];
[controller release];
}
In the code above marked //THIS IS WHERE I THINK THE PROBLEM IS, What I'm trying to do is grab the reference to the image contained in string in the plist and use the reference to get the image. This approach works fine in my cellForRowAtIndexPath method where I use it to populate the left hand side of the table with thumbnail images referred to from my plist.
In the above code mainImage refers to a string I've tried to connect to a UIImageView outlet in my TableDetailViewController.xib through my TableDetailViewController.m file as below. This is where I think Problem number two is:
- (void)viewWillAppear:(BOOL)animated
{
[super viewDidLoad];
//This Bit says that the text contained in UITextView blurb is the string dText, which is used in my didSelectRowAtIndex method
blurb.text = dText;
//This is where I try to do the same thing by saying that UIImageView topImage is the NSString mainImage which I use in my didSelectRowAtIndex method
topImage.image = mainImage;
}
My Logic was that topImage is a UIImageView and mainImage is the string containing the image view which in my didSelectRowAtIndex method I pass the value of the key 'thumb' contained in my plist file.
However the above throws up warnings. Can anyone help?
Thanks for taking the time to read.
Ok, I managed to work this out. My mistake was to declare the pointer mainImage as a NSString instead of as a UIImage. I did this because in the .plist I am using the name of the image is contained within a string. I realised though that as I change this string for the .png file of the same name in my didSelectRowAtIndexPath method, by the time I'm passing it to mainImage it is no longer a string I'm passing, it's an image. Sorted! An easy mistake for a newb like me to make. Thought I should post as I'm sure I wont be the only one who makes this mistake.