Convert NSString to NSMutableArray to added in tableview - objective-c

Question

Hi I wanted convert NSString into NSMutable array and in the final added into Tableview my String is this
result=Vlad,Mama,Papa,Son
I wanted to do something this
Anarray=(Vlad,Mama,Papa,Son)
And added to Tableview. Can anathing help me.What I do
NSArray *arr = [result componentsSeparatedByString:#","];
dataArray=[[NSArray alloc]initWithObjects:arr ,nil];
And try to added into
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [dataArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString*cellid=#"Cell";
UITableViewCell*cell=[tableView dequeueReusableCellWithIdentifier:cellid];
if(cell==Nil){
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellid];
}
cell.textLabel.text=[dataArray objectAtIndex:indexPath.row];
return cell;
}
But I have mistake
enter image description here

Answer 1

componentsSeparatedByString returns you the array, if you want a mutable array you can use the following code.
NSArray *arrComponents = [str componentsSeparatedByString:#","];
NSMutableArray *arrmFilter = [[NSMutableArray alloc] init];
for(int i = 0; i < [arrComponents count] ;i++)
{
NSString *str = [arrComponents objectAtIndex:i];
[arrmFilter addObject:str];
}

Answer 2

you've added your "arr" as element inside your "dataArray".
in case dataArray is NSMutableArray :
dataArray = [NSMutableArray arrayWithArray:arr];
in case dataArray is NSArray :
datatArray = [NSArray arrayWithArray:arr];

Answer 3

May be you didn't alloc and init dataArray.
You can try below code.
#import "ViewController.h"
#import "MyTableViewCell.h"
#interface ViewController ()
#end
#implementation ViewController
{
NSMutableArray *arrData;
}
- (void)viewDidLoad {
[super viewDidLoad];
NSString *str = #"objective c,swift,java";
arrData = [[NSMutableArray alloc]initWithArray:[str componentsSeparatedByString:#","]];
NSLog(#"%#",arrData);
// 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)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return arrData.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
MyTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell" forIndexPath:indexPath];
cell.lblData.text = [arrData objectAtIndex:indexPath.row];
return cell;
}

Answer 4

componentsSeparatedByString gives you an array. Which is what you want.
[[NSArray alloc]initWithObjects:arr ,nil] gives you an array containing just one element, an array containing your strings. Which is totally wrong. An array containing four strings is absolutely not the same as an array containing an array containing four strings.
dataArray.count will be 1 - because there is one element which is itself an array. And dataArray [0] will be that array, not a string.