I have a layout in which I will have 2 UITableViews with custom cells. The second UITableView must be inside the first.
My question is: how to delegate second UITableView?
Can I delegate both to my ViewController? In that case it will use the same methods and I have to find out which UITableView is managed right now.
Or I have to delegate it inside custom UITableViewCell of the first UITableView?
Any recommendations are appreciated.
EDIT: I don't know how to implement solutions here, because I have Storyboard. Inside my current UIViewController I set delegate and dataSource of the first UITableView to my View Controller.
My problem is that I don't know how to set the same properties of the second Table View (which will be inside UITableViewCell). I can not set them to UITableViewCell (IB does not allow that).
Where and how to set then in the IB?
A far better solution would be to abstract the DataSource and Delegate implementations away from your view controller so that they can be personalised per tableview as required (please note that the code is taken from the objc.io article Lighter View Controllers.
E.g.
#implementation ArrayDataSource
- (id)itemAtIndexPath:(NSIndexPath*)indexPath {
return items[(NSUInteger)indexPath.row];
}
- (NSInteger)tableView:(UITableView*)tableView
numberOfRowsInSection:(NSInteger)section {
return items.count;
}
- (UITableViewCell*)tableView:(UITableView*)tableView
cellForRowAtIndexPath:(NSIndexPath*)indexPath {
id cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier
forIndexPath:indexPath];
id item = [self itemAtIndexPath:indexPath];
configureCellBlock(cell,item);
return cell;
}
#end
Then you could utilise it as follows:
void (^configureCell)(PhotoCell*, Photo*) = ^(PhotoCell* cell, Photo* photo) {
cell.label.text = photo.name;
};
photosArrayDataSource = [[ArrayDataSource alloc] initWithItems:photos
cellIdentifier:PhotoCellIdentifier
configureCellBlock:configureCell];
self.tableView.dataSource = photosArrayDataSource;
The same process could be followed with the UITableViewDelegate implementations to provide you with a very clean, separated and de-coupled code base. Your requirement for two tableviews will then be intrinsically easier to implement.
My answer is
For identifying two table view data source and delegate method is,better to set tag for the table views.
Set this below coding in your tableview delegates method.
if(tableView.tag==0)
{
}
else
{
}
Also you can vary this by assigning different name to these table view.
if(tableView==FirstTableView)
{
}
else
{
}
You just check table condition for every delegate method
Use this code to register custom cell.
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if(tableView == self.yourFirstTable)
{
CustomCell *cell=[tableView dequeueReusableCellWithIdentifier:#"cellModifier"];
// your code
}
else
{
// second table cell code
}
return cell;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if(tableView == self.yourFirstTable)
{
// first tableView number of row return
}
else
{
// second table number of row return
}
}
And create prototype cell in TableView
And Set CellReusableId like this way
Related
I Want to Implement Two Tableview In One Class.
I Khow objective-C does not support method overloading and also Khow How Use Two TableView With Same Method but what if have different parameter type?
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView dismisWithIndexPath:indexPath];
}
- (void)tableView:(YALContextMenuTableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
}
You cannot use two separate delegate method for two table views in same view controller.Instead of using two different table view delegate methods,you can better to set tag and name for table Views.
First table view name
if([tableView isEqual:YourFirstTableViewName]) {
......//Your coding part
}
else if([tableView isEqual:YourSecondTableViewName]) {
......//Your coding part
}
else {
......//Your coding part
}
Second use the tag for table view
if(tableView.tag == 0) //Set tag whatever you want for first table view
{
......//Your coding part
}
else if(tableView.tag == 1) //Set tag whatever you want for second table view
{
......//Your coding part
}
In the delegate method, test for the type of table view class to determine which table view called the method,
if ([tableView isMemberOfClass:[YALContextMenuTableView class]]) {
// do stuff for table 1
} else {
// do stuff for table 2
}
I have taken over an iOS project and have to refactor a list of views into a UITableView. I am using Storyboards and have subclassed UITableViewCell. One subclass is called MenuItemCell and has a headerLabel, detailLabel, and priceLabel which are properties set up in the Storyboard and configured in MenuItemCell. I am able to manipulate these via cellForAtIndexPath like this:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *MenuItemCellIdentifier=#"MenuItemCell";
id dic=self.tmpMenu.listItems[indexPath.row];
if([dic isKindOfClass:[MenuItem class]]){
MenuItemCell *cell = [self.menuTV dequeueReusableCellWithIdentifier:MenuItemCellIdentifier];
MenuItem *menuItem=(MenuItem *)dic;
cell.menuItem=menuItem;
cell.headerLabel.text=menuItem.header;
cell.headerLabel.numberOfLines=0;
cell.priceLabel.text=menuItem.price;
// how to handle this custom spotView
if([menuItem hasInstoreImage]){
UIView *instoreImageDot=[self circleWithColor:[UIColor redColor] radius:4];
[cell.spotView addSubview:instoreImageDot]; // ON SCROLLING, this populates to all the different table cells
}
return cell;
}
return nil;
}
The last piece is that there is a custom UIView called spotView. Currently, I am creating this circle in code in my controller via circleWithColor and trying to add to [cell.spotView] but scrolling causes this to populate on different table cells. How should I set this up? I have added a method to my custom view but this suffers from the same problem.
Cells get reused, you will need to tell the tableView to remove the custom View
if([menuItem hasInstoreImage]){
UIView *instoreImageDot=[self circleWithColor:[UIColor redColor] radius:4];
[cell.spotView addSubview:instoreImageDot];
}else{
//remove it if condition is not met
//or You can add a place holder view instead
}
What is happening is that iOS is reusing cells as you scroll and some of the reused cells already have the instoreImageDot view added as a subview.
You really shouldn't do layout stuff in the cellForRowAtIndexPath method. It should only ever be used to dequeue a reusable cell and then set the data for the cell. All the layout stuff should be handled by the cell itself.
Don't create the instoreImageDot in the controller. Add a method in your custom cell - something like (written in C#, but should be easy to translate):
UpdateCell(MenuItem item, bool hasInstoreIamge)
{
menuItem = item;
headerLabel.text = item.header;
priceLabel.text = item.price;
headerLabel.numberOfLines=0;
if (hasInstoreImage)
{
// code to add the instoreImageDot as a subview of the cell
}
}
Also in the Custom Cell, Implement the prepareForReuse method and inside this method, remove the instoreImageDot view from the cell - so that it can only ever be added once.
- (void)prepareForReuse {
if([self.subviews containsObject:instoreImageDot])
{
[instoreImageDot removeFromSuperview];
}
[super prepareForReuse];
}
Now your cellForRowAtIndexPath method can look like:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *MenuItemCellIdentifier=#"MenuItemCell";
id dic=self.tmpMenu.listItems[indexPath.row];
if([dic isKindOfClass:[MenuItem class]]){
MenuItemCell *cell = [self.menuTV dequeueReusableCellWithIdentifier:MenuItemCellIdentifier];
MenuItem *menuItem=(MenuItem *)dic;
cell.UpdateCell(menuItem, [menuItem hasInstoreImage]);
return cell;
}
return nil;
}
This question already has an answer here:
How to make a Sub Table view in a TableViewCell
(1 answer)
Closed 9 years ago.
In one of the cell of a tableView, i want to put another tableView(toyTable for example). Can anyone help me in this? I have created a tableView (main one) and another tableview in my project. Now in my main tableView, i have many cells and in one of the cell, i want that another table(toyTable) to be present in the cell.
Lets say you have two tables.
Make properties for both of them
// This one might be connected as an outlet with your storyboard
#property (nonatomic) IBOutlet UITableViewController *mainTable;
// This one should be in the .m file
#property (nonatomic) UITableViewController *toyTable;
Implement delegate and datasource protocol methods for each.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
if (tableView == self.mainTable) {
return 2;
} else {
return 1;
}
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.mainTable) {
return 10;
} else {
return 5;
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableView == self.mainTable) {
// If this is the indexPath for the cell that should contain
// the nested table view, initialize your self.toyTable, set
// datasource and delegate etc.
// Else configure your default outer cell
} else {
// Configure the cells of your self.toyTable;
}
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableView == self.mainTable) {
// If this is any normal outer cell
return UITableViewAutomaticDimension;
// If this is the outer cell that contains self.toyTable
return some bigger value (if desired)
} else {
// The height of the inner cell
return UITableViewAutomaticDimension;
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableView == self.mainTable) {
// If this is the outer cell that contains self.toyTable
// You should ignore the selection
// Else handle it according to your needs
} else {
// Handle click on inner cell
}
}
If you are using a static table view as your mainTable, you can directly drag a table view onto one of your static cells and define prototype cells etc for it.
Putting table view inside table cell is a bad design. Insert toyTable as a section of main table view instead.
In cellForRowAtIndexPath add that table and do the code like this :
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
if (tableView == mainTable) {
//do this for main table
}
else {
//do this for second table
}
}
Why are u doing this because its a bad idea for nesting the tableview instead UITableview already having expand and collapsing property.
Use below link for reference http://www.cocoanetics.com/2011/03/expandingcollapsing-tableview-sections/
I'm really new to Objective-C here so what I'm asking may be trivial to most of you but any guidance will help.
Here's a picture of my storyboad.
My current objective is to allow for the user to enter in the number of sets (NSInteger *numReps) and then press the "Log Reps" button and have the table initialize with numReps cells that look like the prototype cell.
Now where I'm at a loss for the implementation. I've never done this kind of thing before so I'm not exactly sure what the best way to go about it is. I have thought of making a custom class for the UITableView table that would take info from the view after the Log Reps button is pushed. I'm not entirely sure how this would need to be implemented. Or can I simply add the table to the properties of the view controller and setup the table within the view controller? That was my initial idea and seems ideal so that I would have everything in one place.
Pleas advise. I am new to all of this and come from a C++ background so I'm still learning a lot of the notation.
Try this:
-(IBAction)btnLogClicked {
int iSet = 4 //Number of row in table
UITableView *tblView= [[UITab;eView alloc]initWithFrame:CGRectMake(0,50,320,100)];
tblView.delegate = self;
tblView.dataSource = self;
[self.view addSubView:tblView];
}
Table View Data Source and Delegate Methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return iSet;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Display what you want to display in each cell
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
It's not clear what you want to present in your prototype cells, but you need an array (or probably an array of dictionaries) to populate the cells. The number of rows is determined by the number of entires (the count) of that array. So, if you take the number entered by the user, and add that many object to your array, then call reloadData on the table, you will get the number of rows that you want. What those object are that you add to the array, depends on what you're trying to show there.
you could start reading: Table View Programming Guide for iOS
But I can answer you:
You can add the UITableView to the UIViewController, but you need set your UIViewController like the TableView's delegate and dataSource. Your ViewController need to implement the protocol: UITableViewDataSource
The method that you are looking for is: tableView:numberOfRowsInSection:
But I really recommend you that read the Apple Reference.
I have a tableview with a few items. I want to get a new view when I click on one of the cells. However, I want the view to be different depending on which cell I clicked.
For example: I have a tableview of buildings. These buildings can be Airports, factories and houses.
When I click on a cell that shows an airport, I want the next view to be different than when I click on a cell that shows a factory.
How do I do this?
The problem can be easily solved by giving each cell a type. If you're implementing a custom cell class add it as an enumerated type (improves readability)
// cell header file
typedef enum {
CellTypeAirports,
CellTypeFactories,
CellTypeHouses
} CellType;
#interface CustomTableCell
// ...
#property(assign) CellType type;
#end
Set the type when you're instantiating (dequeueing) the cell and then in your tableView:didSelectRowAtIndexPath: method check the cell's type
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// ...
if ([cell type] == CellTypeAirports) {
// push airports vc
} else if ([cell type] == CellTypeFactories) {
// factories
}
// and so on
}
If you're using standard UITableViewCells then you can utilize their tag property to store the type.