how to reload the Table view data when tap on UILabel(UITapGestureRecognizer) - ios

Question

I am new to objective c, and i am very interested in learn new technologies.
I have a UITapGestureRecognizer on a label. I am using 2 label ,when i tap on label1 load some data Tableview and when I tap on label 2 i want to change the Tableview.
I didn't find any solution for my requirement. so anyone help me .
suggest me guy's how to change the TableView data when tap on UILabel.

Answer 1

You can do this like following way:
Way 1:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
..
..
..
// Here is your stuff for cell
UILabel *lbl1 = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 80, 40)];
[lbl1 setText:#"Label"];
[lbl1 setUserInteractionEnabled:YES];
[cell.contentView addSubview:lbl1];
UITapGestureRecognizer *tap=[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapAction:)];
tap.tag = [NSIndexPath row];
[tap setNumberOfTapsRequired:1];
[lbl addGestureRecognizer:tap];
...
}
- (void)tapAction:(id)sender {
switch(((UITapGestureRecognizer *)sender).view.tag) {
case 0:
// code for first TableView
break;
case 1:
// code for second TableView
break;
....
}
}
Way 2:
in cellForRowAtIndexPath: method:
UITapGestureRecognizer *tap=[[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(tapAction:)];
tap.tag = [NSIndexPath row];
...
Handler method:
- (void)tapAction:(id)sender
{
switch(((UITapGestureRecognizer *)sender).tag)
{
case 0:
NSLog(#"Tap action 1");
break;
case 1:
NSLog(#"tap action 2");
break;
..... }

Answer 2

I assume you have setup the datasource/delegate methods for the tableview? Then change necessary things within these methods when the label is tapped and simply call
[self.tableView reloadData]
If you don't understand anything about what I'm saying then I advise you to first read some manuals about tableviews before starting asking questions on SO :)

Answer 3

Welcome to Stack Overflow!
This answer should help clear things up for you nicely and give you a stronger understanding of how to use table view's and buttons to do what you need.
FIRST
To Alladinian's comment, I highly recommend switching over to the UIButton object instead of using UILabel objects. This way your elements can still display your text (as you were with labels) but you are able to make use of the built-in target capabilities of the button class.
- (void)addTarget:(nullable id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents;
SECOND
Regarding your question, again, simply make use of an already built-in method that is designed for this very situation:
- (void)reloadData;
This method is available by using / setting UITableViewDelegate and the UITableViewDataSource. Like such: here is an example of a generic UIViewController class that conforms (can use properly) the convenient UITableView delegates.
Header File (SomeClassController.h)
// SomeClassController.h
#import <UIKit/UIKit.h>
#interface SomeClassController : UIViewController <UITableViewDelegate, UITableViewDataSource>
// do anything here. properties, methods, etc :)
#property (nonatomic, ...) UITableView *tableView;
#end
Implementation File (SomeClassController.m)
// ...
- (void)viewDidLoad {
self.tableView.delegate = self;
self.tableView.dataSource = self;
}
Now by using UIButton objects you can set a method that will handle the user touching the screen by performing a method. Like here:
- (void)viewDidLoad {
...
[someButton addTarget:self action:#selector(didTouchButton:) forControlEvents:UIControlEventTouchUpInside];
}
- (void)didTouchButton:(__kindof UIButton *)button {
// Here you received the users touch event on the button, do what you like!
// As your question asked how to reload table data, simply add this line
// after following my other steps.
[self.tableView reloadData]; // Here the magic is done!
// This method will automatically reload the table view to display the
// most recently updated data you have given it.
}
Make sure you change your data before reloading, otherwise it may not change both visually or content-wise.
Happy coding!