CODEWITHSUNDEEP
objective-c
Theodoros80
Theodoros80

Reputation: 796

How to set UITextField's correct tag in a loop

I have a loop that generates 100 textfields 10x10.

int counter=0;
for (int i = 0; i < 10; i++) 
{
    for (int ii = 0; ii < 10; ii++) 
    {
        counter++;
        UITextField *tf = [[UITextField alloc] initWithFrame:CGRectMake(0 + 25 * i ,60+25*ii,25,25)];
        counter++;
        tf.tag =counter;

        [self.view addSubview:tf];
    }
}

This is what I get:

1.Tags representation

1 11 21 31 41 51 61 71 81 91
2 12 22 32 42 52 62 72 82 92
3 …………

2.This is what I want:

1  2  3  4  5  6  7  8  9  10
11 12 13 14 15 16 17 18 19 20
21………..

Any ideas? Thank you!

Upvotes: 2

Views: 662

Answers (3)

Sinisa Drpa
Sinisa Drpa

Reputation: 917

Another possibility:

int row = 0;
int column = 0;

for (int i = 0; i < 100; i++) {
   if (!(i % 10) && i) {
      row++;
      column = 0;
   }
   CGRect newRect = CGRectMake(25.0 * column, 60.0 + 25.0 * row, 25.0, 25.0);
   UITextField *tf = [[UITextField alloc] initWithFrame:newRect];

   tf.tag = i;
   [self.view addSubview:tf];

   column++;
}

Upvotes: 0

Warif Akhand Rishi
Warif Akhand Rishi

Reputation: 24248

for (int i = 0; i < 10; i++)
{
    for (int ii = 0; ii < 10; ii++)
    {
        UITextField *tf = [[UITextField alloc] initWithFrame:CGRectMake(0 + 25 * ii,60+25*i, 25, 25)];
        tf.tag = ii + i * 10 + 1;
        [self.view addSubview:tf];
    }
}

Upvotes: 1

Larme
Larme

Reputation: 26036

So, forget about counter. You can retrieve it with you i and ii.

Let's see what your 2 for loop do, where a "-" mean nothing yet, and a "•" a UITextField is put.

----------
----------
----------

Then:

•---------
----------
----------

Then:

•---------
•---------
----------

etc.

So we quickly see that i represents a column and ii a line. It would be good to rename them like this.
Now, if you had logged i and ii you could have figured out what was the logic, which is:

[tf setTag:(ii*10+i+1)];

Note that's just a kindly advice (not a "you could have done it alone if you did the debug yourself") to log things sometimes (like the counter: i or ii in our case) to understand them, especially in loops, when it can get tricky. I do that often when my loops don't do what I expect.

Upvotes: 2

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