This question has been bugging me a LOT lately. Any help would be appreciated.
These were my objectives:
- Setup a UIDatePickerView for a UItextField in a UITableViewCell.
I have done all this so far, and I can see the picker working fine. Whenever I change the picker Value, I use NSLog to display the current value and it is working fine for every change.
This is what I want: ** Whenever I change the pickervalue, I need the value to also be changed automatically in the UITextField (which is in the UITableViewCell)**
This is my CellForRowIndexPath code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier] autorelease];
UITextField *textField = [[UITextField alloc]initWithFrame:CGRectMake(110, 10, 185, 30)];
textField.clearsOnBeginEditing = YES;
textField.textAlignment = UITextAlignmentRight;
[cell.contentView addSubview:textField];
UIDatePicker *datePicker = [[UIDatePicker alloc] init];
datePicker.datePickerMode = UIDatePickerModeDate;
[datePicker addTarget:self action:@selector(datePickerValueChangedd:) forControlEvents:UIControlEventValueChanged];
datePicker.tag = indexPath.row;
textField.inputView = datePicker;
NSDateFormatter *df = [[NSDateFormatter alloc] init];
df.dateStyle = NSDateFormatterMediumStyle;
NSString *local;
local = [self datePickerValueChangedd: datePicker];
NSLog(@"%@", local); //DISPLAYS OUTPUT ONCE
textField.text =local;
[datePicker reloadInputViews];
[datePicker release];
// Configure the cell...
NSInteger row = [indexPath row];
cell.textLabel.text = [doseInfoDetailsArray objectAtIndex:row];
return cell;
}
I am also posting other code below.
- (NSString *)datePickerValueChangedd:(UIDatePicker*) datePicker{
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(100, 50, 68, 68)];
NSDateFormatter *df = [[NSDateFormatter alloc] init];
df.dateStyle = NSDateFormatterMediumStyle;
label.text = [NSString stringWithFormat:@"%@",[df stringFromDate:datePicker.date]];
NSLog(@"%@", label.text); // DISPLAYS OUTPUT WHENEVER PICKER IS MOVED
doseInfoDetailsTable.reloadData;
return (label.text);
//[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(t) name:TestNotification object:label];
[df release];
}
Output displays correctly. But I need it to change in the UITextField also.
2011-06-01 17:32:23.740 Tab[13857:207] Jun 1, 2017
2011-06-01 17:32:23.740 Tab[13857:207] Jun 1, 2017
2011-06-01 17:32:25.321 Tab[13857:207] Dec 1, 2017
2011-06-01 17:44:51.453 Tab[13857:207] Jun 1, 2017
2011-06-01 17:44:52.605 Tab[13857:207] Jun 1, 2018
2011-06-01 17:44:53.467 Tab[13857:207] Jun 2, 2018
2011-06-01 17:44:54.247 Tab[13857:207] Jun 5, 2018
This is just a follow up to a flurry of comments on the accepted solution. Thank you all for your help. To make this work, the sample code is as follows:
Where
textFieldThatWillBeUpdatedByTheUIDatePicker
is declared as aUITextField
in the header file.Finally, here is the method that changes the cell:
To handle cell reuse, do what @Deepak said with regards to an array you can use this line:
Where the
tag
is set incellForRowAtIndexPath
like this:I'm assuming that the
dateArray
is pre-populated and prior to the table view getting called for the first time either with real dates or blank values. If you try to replace something that isn't there it is going to fail obviously.Finally, when the
UIDatePicker
is being built incellForRowAtIndexPath
include this line to handle the cell reuse:The first time around it may be blank or pre-populated with a date.
You don't need to instantiate multiple instances of
UIDatePicker
. One should do. Assign it to all the text fields. Now to update the text field, you will have to identify which text field is being updated. For this you should adopt theUITextFieldDelegate
protocol and implement thetextFieldDidBeginEditing:
method to set the active text field. Now, when the value is changed on theUIDatePicker
instance, update the active text field.But this is sadly not enough. You will face a problem with cell reuse. To counter this, you will have to maintain an array of dates for each of your rows and update the array every time the value is changed on the
UIDatePicker
instance. You can identify which cell the text field belongs to by eithertag
ging it or by getting the superview which would be aUITableViewCell
instance and then callingindexPathForCell:
method on theUITableView
.And on a side note,
return (label.text); [df release];
is wrong as the method will return prior todf
beingrelease
d. You should swap the order there.