I have created a custom UITableViewCell.I have only two rows in my tableView. Now I want to disable 2nd cell when 1st is tapped and disable 1st cell when 2nd is tapped.
How can I do that ? please Help and guide
Implement the UITableViewDelegate method willSelectRowAtIndexPath.
In that method, return the indexPath value that's passed to you if you want the user to be able to select it, or return nil if you don't want it to be selectable.
I'll leave it to you to figure out the logic that decides when different cells should/should not be selectable.
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
tableView.cellForRowAtIndexPath(NSIndexPath(forRow: (indexPath.row + 1) % 2, inSection: 0))?.userInteractionEnabled = false
}
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I am working on xamarin.ios. I have a UITableView control at my view. I select a row in it and then move to next screen. If I come back to UITableView screen again the selected row doesn't highlight. It highlight for a second and then deselect automatically. How it can be managed if I come back to the tableview, the selected row should be highlighted.
Hard to say without seeing any code, but looks like the tableview is being reloaded in viewDidAppear. You may want to store the selected row index in NSUserDefaults or somewhere else to persist the selection between view loads/appearances.
Make sure you are setting it selected after the tableview reloads as well, using an appropriate delegate method. Again, without any code to look at, it's hard to see where - and which order - you're doing this, but an example (Swift):
override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
if indexPath.row == tableView.numberOfRowsInSection(0) - 1 {
cell.selected = true
}
}
Alternatively, you could set the selected property in your datasource directly, and then you could do:
override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
datasource[indexPath.row].selected == true {
cell.selected = true
}
}
If you do it this way, then the selected row will always be set correctly every time the tableview is loaded.
(Full disclosure, I'm not a Xamarin dev, so I'm not sure how those translate from Swift/Obj-C to Xamarin)
I have a tableview which is inside the a tableview cell.
After click the "JAVA" inside "test1", I click the "About" Row which don't have the tableview inside:
But you can see that, the "About" and "JAVA" have the background colour at the same time. This is the automatic feature of tableview in iOS, I don't know how to code to prevent this happen. What I want is that when I click the "Java" inside "test1", the background color of "About" would disappear.
You are going to need to keep track of which cell was selected if you only want one cell selected at a time from both table views.
The best way to do that is to create a delegate for the nested tableview. So when that cell is selected it can call back to the parent tableview and let it know to unselect anything that was selected. The main class will need to keep track of the index that was selected as if another one is chosen then it can reach into the cell with selected cell and deselect that.
A little tricky, are you sure you can't get the same results from just using one tableview and multiple sections?
Use this code it helps you
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
var selectedCell:UITableViewCell = tableView.cellForRowAtIndexPath(indexPath)!
selectedCell.contentView.backgroundColor = UIColor.greyColor()
}
To deselect the selected row use this code
override func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) {
var cellToDeSelect:UITableViewCell = tableView.cellForRowAtIndexPath(indexPath)!
cellToDeSelect.contentView.backgroundColor = colorForCellUnselected
}
The first cell in this TableViewController is suppose to alert the user when their status is liked or favorited. I need to create a function so when a button is tapped, it will call this table view cell and notify them who liked their photo. I am just not sure how to call this specific table view cell. Can anybody help me out? I have searched SO and Apples Swift Documentation with no luck.
In your didSelectRowAtIndexPath tableview delegate method you can get the index path (row position) of the cell they tapped on and then if you've got an array of data (used to populate the tableview in the first place) you know where to look to find out which notification/activity it is:
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let selectedItem = items.objectAtIndex(indexPath.row) as String
}
You can also get the cell by adding this inside the method:
let cell = tableView.cellForRowAtIndexPath(indexPath)
You can get the reference to the cell with cellForRowAtIndexPath method of UITableView.
I want to expand my UITableViewCells with a UITableView that has multiple sections. The way I'm doing it is as follows:
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
selectedRowIndex = indexPath
habitTableView.beginUpdates()
habitTableView.endUpdates()
}
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
if (selectedRowIndex != nil && indexPath == selectedRowIndex!){
return 147
}
return 90
}
However there are some strange behaviors, for example, if one cell expands it sort of "eats up" the next section header underneath it so the section header disappears. I am just wondering - is there any nuances with a UITableView that has multiple sections?
So, you can do one thing is to have two protocol type of UITableViewCell. One is for normal and another one is for expanded. Once you type on a cell, you just need to update the delegate to use expanded one instead normal one. When updating, you only need to call reloadRowsAtIndexPaths to prevent reload everything.
You only need to create one more cell prototype and have a boolean value for indicating the state. Then, add your logic to cellForRowAtIndexPath.
I'm working with a UITableView which is a list of friends (I have 20 friends). I have, on top of those 20 friends cells, a unique cell in another section called "ALL FRIENDS" which allows me to select all my friends in one click.
When this "ALL FRIENDS" cell is selected, this code is called :
var index = 0
for friend in self.friendsList {
var indexPath = NSIndexPath(forRow: index, inSection: 1)
self.tableView.selectRowAtIndexPath(indexPath, animated: true, scrollPosition: UITableViewScrollPosition.None)
index += 1
}
Everything works fine for the visible cells. When a cell is selected the background color changes but this only works for visible cells.
Any ideas why ?
Because UITableView is dynamically displayed and invisible cells are not there.
UITableView basically dequeues a cell that's about to disappear and appends it where you're scrolling. To select all of the cells, you have to do it differently:
You'll have to set a global variable to true, let's say var allSelected = true.
Then call self.tableView.reloadData()
Which will be reflected in tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell by doing cell.selected = true.
That will ensure that all of the future displayed cells will be selected as well.
So Michal's answer is great, but I would like to give you an alternative: you can create that tableview without dequeuing and reusing cells, so the cells remain alive at all points.
You can do this by creating individual cells, and adding them to an array
var array = [UITableViewCell]
for friend in self.friendsList {
var cell = UITableViewCell()
// customize your cell however you want, or use custom nibs
array.append(cell)
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) {
return array[indexPath.row]
}