I want to use the power of UITableViewCell like disclosure accessory, but I don't need the whole UITableView. Is this possible and appropriate to do so ? I don't see any delegate on UITableViewCell, so don't know where should I put code previously in - (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath; any references or suggestions on this ?
Correct me if im wrong but .. Why would you use a cell like that ? If you dont want to use the power of the UITableView you can just add a view and do all the stuff you do in your cell. And that would keep the Apple Standard too.
You could just make a UITableView with one section and one row, and load that cell into it. This would be pretty easy to do and wouldn't run the risk of running afoul of the Apple review board.
Related
I have created numerous Xcode projects to see if this was a single project problem but no. The problem that I am getting is that when I populate a UITableVIiew with either local data or data that is stored in a Parse database it does not show.
I have tried re-installing Xcode, cleaning my project and walking through the code/project to see if I'd made a mistake but everything looks in place.
An example is that I created a UITableViewController with a UIImage in the cell and when I build and run the project it does not show up.
Here is an example:
Thanks in advance.
You should implement two required methods of UITableViewDataSource.
Something like that:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 5;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell"];
return cell;
}
This would go quicker if you just posted the available code... Annnnyway...
The reason I ask is because if you've only done this in storyboard, and it's a dynamic table, the table looks to your numberOfRowsInSection method to see if it should be populating the table or not. If this is 0, then you'll get no rows no matter what you put into the storyboard.
Also, if you've got a cell identifier of cell in your cellForRowAtIndexPath, but you haven't identified your storyboard cell as cell, then you'll still get blank cells.
Furthermore, if you have implemented these two methods correctly, you need to ensure that this table is hooked up to that class as it's dataSource, either via storyboard or programatically.
But these are all just guesses because I would need to see code to figure it out.
If you are using a UITableViewController, have you changed the cells to static?
You said you don't have any custom code other than what Xcode provides. That is your problem.
You need to implement the UITableViewDataSource methods in order to install your data into your table view. Xcode does not do that. The code Xcode puts into your view controller tells the table view that there is no data. You need to report that there is at least 1 section, and at least 1 row in that section. You then need to write code for cellForRowAtIndexPath that installs data from your model into your cells.
Nikita lists 2 of the 3 methods that you must implement before you table view will do anything.
I am somewhat new to iOS, but am experienced in Android.
I have an app I am working on and it needs to populate a page with your "history" of past people you've interacted with, and it shows their picture, name, rating, and some other information.
This needs to populate in a vertical list, maybe a table? See the image below...
Now, in android, I would create a custom class with a layout that houses the picture, name, information, rating, and what not in one xml file, and in the activity I would call that class in a for loop, grabbing all the users and then programmatically it would add each view one after another, with their own unique user information until there is no more users to populate with.
How exactly can I do this in iOS and xcode? Do I need to make an XIB and add the picture, name, rating, and info place holders in that, and create a custom class for it that I would use to run in a for loop as well? I am a little stuck on how to do this with iOS.
Any help is much appreciated, and I can provide any additional information! Thanks :)
In iOS, you probably want to use a UITableView, with each row being a custom subclass of UITableViewCell. You can either create the layout for those cells in a separate XIB, or put the whole lot, tableView and "prototype" cells in a storyboard. You can achieve a lot without even subclassing, so fire up a dummy project in XCode and play (using one of Apple's templates gives you a good start). Enjoy.
What you probably want is to use a UITableView.
You don’t do the for-loop yourself. What you do is implement a set of delegate methods that the table view calls back to.
You can create your prototype cell in your XIB or Storyboard. When you add a Table View to the layout, you can then add a cell to that table view, and that cell will be your prototype. It looks like you only need one prototype cell, but you can create as many as you need. In Interface Builder you give the prototype cell a “reuse identifier”, which is just an arbitrary tag you use to refer to the prototype in your code. Your prototype cell can be your own subclass of UITableViewCell, or if you don’t need any custom code in it, you can just use UITableViewCell.
Then you implement several delegate methods. One is where you set the number of sections in the table view; it looks like you will only have on section.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tv
{
return 1;
}
Then you tell it how many items are in the table view. Assuming you have the objects you want to display in an array, you just return the length of the array.
- (NSInteger)tableView:(UITableView *)tv numberOfRowsInSection:(NSInteger)section
{
return self.objects.count;
}
Then, for each item in the array, cellForRowAtIndexPath will be called. Make that method return the actual cell. You call dequeueReusableCellWithIdentifier to retrieve your prototype cell, using the reuse identifier you assigned in Interface Builder. Then use the corresponding object to set up the UI elements in your cell.
- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)i
{
UITableViewCell *cell = [tv dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:i];
Thingy *item = self.objects[i.row];
cell.textLabel.text = item.name;
return cell;
}
That should be enough to get you started with the documentation, now that you have the overview of what you need to implement.
The first thing you have to do in switching from Android to iOS is to learn the terminology. Then you'll know what to search for on Google, SO, etc.
What's you're looking to do is create a UITableView.
Here is a link to a super basic 'how-to' to get you started with tableviews.
http://www.appcoda.com/uitableview-tutorial-storyboard-xcode5/
Once you've got the basics down, you'll want to take that a step further with learning how to customize the UITableViewCell within your tableview, so you can accomplish the look you've detailed in the question.
http://www.appcoda.com/customize-table-view-cells-for-uitableview/
I'm not sure I can help anymore than that at the moment. Jump in, learn tableviews, and start searching on OS to answer the million other questions you'll have a long the way.
Good luck!
I am new in iOS programming and I would like to create I view for the settings of my app that looks like iPhone's one (like in the picture). Some of rows will call other views when taped and other will not.
What is the best way to do that? I thought about TableView with prototype cells, but is there a best way to do it? or a best-practice for what I want to do? Or maybe a tutorial online?
The fast way in Interface Builder:
Use a UITableViewController, make it STATIC and use the GROUPED style (all in IB).
You can setup the cells to show disclosure indicators (or not) in IB also.
You can segue directly from the rows or the UITableViewController to where you want to go.
If you segue from the UITableViewController, implement the "didSelectRowForIndexPath" method and call "performSegueWithIdentifier" accordingly.
A structure like this is best by UITableView.
First you select how many sections you want, and customize each section with a data structure that you have to be filled with (Probably an array.)
Then you fill up each rows inside
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
method, and call your value from the array/dictionary that you have.
for going to a next view when clicked upon
Use the method
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
Hope this helps
The best way to do that is using static UITableViewCell.
See UITableView Programming.
The optimal solution here is undoubtedly UITableView. This is because firstly, you have the need to display a list of options that would have external links to other pages and UITableView is designed and used for this purpose.
In an addition to that, if you want, you can also expand and collapse the rows of your parent TableView into a Child TableView i.e a UITableView as a subview of its parent UITableView.
Put up a UITableView and populate it with UITableViewCell. That will be just fine with the requirement you have.
Hope this helps.
I've thought of a couple of approaches to use inside the - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath method:
Create outlets and link the cells to them, then check which one was selected by comparing the reference
Set and check a unique reuseIdentifier property on each cell
Use the indexPath, because you know which cell is at which index since they're defined statically anyway
What is the best approach? Or perhaps there's another, better approach?
Definitely indexpath is the best approach as many of the delegates of tableview works on indexpaths. You can easily get hold of the rows by keeping a track of indexpath. I guess you can also put to use the property of cell called 'selected' to check whether a cell state is selected or not. Hope this helps. Also make use of apple docs on tableviews.
I'm new in Xcode Programming and I'm developing a small application but I have a problem.
I have a Table View with a Custom Cell, taking externally the data to populate the view (by JSon). I have a big slow navigation in list because in the method - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath. I get an external image and this makes it all slow because it runs every time a cell displayed.
How can I populate the entire list without using this method? Or is there an alternative to make it understand that the image exists?
There are few methods Apple suggests when customizing your UITableViewCell. You probably is trying to add subviews to the contentView of the cell. A better approach is described here Subclassing UITableViewCell. Well, I suggest you read the TableView Programming guide.