TextView array to TableView - ios

Question

I need to use a UITextView to enter in information, which then moves the information into a UITableView.
I need it to update the tableview each time a new line has been added.
I thought i could create an array out of the information in the TextView and place it into a TableView but i cant seem to figure out how to do this.
With this it still doesn't populate the table with what i type in the 'UITextView'.
-(void)textViewDidChange:(UITextView *)textView{
listArray=[[NSMutableArray alloc]initWithArray:[textView.text componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]]];
[self.tableView reloadData];
}
- (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];
}
cell.textLabel.text = [listArray objectAtIndex:indexPath.row];
return cell;
}

Answer 1

First set the delegate property of the UITextView to your viewController. Then use textViewDidChange method to initialize your array--
in ViewController.h file-
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController<UITableViewDataSource,UITableViewDelegate,UITextViewDelegate>
#property (weak, nonatomic) IBOutlet UITableView *tableView;
#property (weak, nonatomic) IBOutlet UITextView *txtView;
#end
and in ViewController.m file
#import "ViewController.h"
#interface ViewController (){
NSMutableArray *listArray;
}
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.tableView.delegate = self;
self.tableView.dataSource = self;
self.txtView.delegate = self;
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 1;
}
-(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];
}
cell.textLabel.text = [NSString stringWithFormat:#"%#",[listArray objectAtIndex:indexPath.row]];;
return cell;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return listArray.count;
}
-(void)textViewDidChange:(UITextView *)textView{
listArray=[[NSMutableArray alloc]initWithArray:[textView.text componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]]];
[self.tableView reloadData];
NSLog(#"Array-- %#",listArray);
NSLog(#"Array Count-- %lu",(unsigned long)listArray.count);
NSLog(#"Text-- %#",textView.text);
}
#end
Use listArray to show your data on tableView.

Answer 2

You can create an array with the text of textview using the following method :
NSString* string;
NSArray* array = [string componentsSeparatedByString:(nonnull NSString*)]
now you can create your tableview using the above array. whenever you want to update the table, you can call the following method :
[tableView reloadData];

Answer 3

If you just want to look for new lines you can do something like this:
NSArray <NSString*> *components = [self.textView.text componentsSeparatedByString:#"\n"];
If you implement the delegate methods of UITextView specifically to get notifications when the text content changes you can then update an array that feeds into your table view.
Also here's the code in Swift just because we should be thinking about it now.
let components: [String] = textView.text.componentsSeparatedByString("\n")