Question

My program contains three textfields and I am inserting the data into an sqlite database. Now I am trying to display the data from the database in the tableview. For that I tried to add the data into an NSMutableArray and tried to print that. But it is showing a null value in the array. I don’t know why I am getting a null value. cont is the NsMutableArray.

    [cont addObject:name.text];
    [cont addObject:address.text];
    [cont addObject:phone.text];

    NSLog(name.text);
    NSLog(address.text);
    NSLog(phone.text);

    int length= sizeof(cont);


    NSString *strlen = [NSString stringWithFormat:@"%d", length];
    NSLog(strlen);

    for(int i=0;i<strlen;i++)
    {
        NSArray *arr = [cont objectAtIndex:i];

        NSString *u = [NSString stringWithFormat:@"%d",i];
        NSLog(u);
        NSLog(arr);

    }

I am always getting length as 4 and null in arr. Can anyone please tell me why it is so? I know there must be some error in the code.

Answer 1

use

int length=[cont count];
       //array  count 

instead of

int length= sizeof(cont);

and refer that Link

Size of NSArray

Sample

NSMutableArray * cont=[[NSMutableArray alloc]init];

    [cont addObject:@"1"];
    [cont addObject:@"ddg"];
    [cont addObject:@"ggg"];

    for(int i=0;i<[cont count];i++)
    {
        NSLog(@"Index %d",i);
        NSLog(@" Object %@",[cont objectAtIndex:i]);
    }
    [cont release];