how to hide custom button when editing mode is enabled? - iphone

Question

I made a custom button using drawRect: and put it in my headerview for my tableview. I want the custom button to be hidden when editing mode is selected. i know i can do that by using the method:
-(void)setEditing:(BOOL)editing animated:(BOOL)animated
but for some reason, my button isn't actually dissapearing when I either 1) set it to nil, 2) or use the button.hidden property. Here is my code:
TableViewController.h:
#interface ToDoTableViewController : UITableViewController <Properties2ViewControllerDelegate, UITableViewDelegate>{
addButtonView *button;
}
#property (strong, nonatomic) NSMutableArray *taskArray;
#property (strong, nonatomic) NSMutableArray *completedArray;
-(IBAction)addCell:(id)sender;
-(void)buttonPressed:(id)sender;
#end
TableViewController.m
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
UIView *headerView;
UIView *seperatorView;
CGRect testFrame = CGRectMake(280.0, 5.0, 30.0, 30.0);
button = [[addButtonView alloc]initWithFrame:testFrame];
NSString *sectionTitle = #"Incomplete Tasks";
NSString *section2Title = #"Completed Tasks";
UILabel *label = [[UILabel alloc]init];
label.textColor = [UIColor colorWithRed:236.0/255 green:240.0/255 blue:241.0/255 alpha:1.0f];
label.font = [UIFont fontWithName:#"HelveticaNeue-Light" size:25];
label.backgroundColor = [UIColor clearColor];
label.frame = CGRectMake(10.0, 0.0, 320.0, 40.0);
headerView = [[UIView alloc]initWithFrame:label.frame];
[button addTarget:self action:#selector(addCell:) forControlEvents:UIControlEventTouchUpInside];
[button addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
CGRect sepFrame = CGRectMake(0, headerView.frame.size.height-2, 320, 1);
seperatorView = [[UIView alloc] initWithFrame:sepFrame];
seperatorView.backgroundColor = [UIColor colorWithRed:236.0/255 green:240.0/255 blue:241.0/255 alpha:1.0f];
[headerView addSubview:seperatorView];
switch (section) {
case 0:
label.text = sectionTitle;
[headerView addSubview:label];
[headerView addSubview:button];
break;
case 1:
label.text = section2Title;
[headerView addSubview:label];
// if (completedArray == nil)
// headerView.hidden = YES;
break;
}
return headerView;
}
-(void)setEditing:(BOOL)editing animated:(BOOL)animated{
[super setEditing:editing animated:animated];
if([self isEditing]){
button.hidden = YES;
}else {
button.hidden = NO;
}
}
---EDIT----
-(void)setEditing:(BOOL)editing animated:(BOOL)animated{
[super setEditing:editing animated:animated];
if([self isEditing]){
button.hidden = YES;
[[self tableView] reloadData]; //shouldn't this make the button dissapear?
}else {
button.hidden = NO;
}
}

Answer 1

Whenever the table view is reloaded your code will recreate the entire header, including creating a new button. So you may have set the old button to hidden and then it gets destroyed and replaced by a new, visible, button.
When returning the header, either create it once and always return the same instance, then changing the hidden property should work. Or, check if the table isEditing each time the header is created and decide what to do as a result.
Let's go with the more efficient header reuse option:
Create a property to hold the header view(s) - an array.
In viewDidLoad create the header views (using your current code, but moved to a different method).
Add the header views to the property (ensure you initialise the array first)
Change viewForHeaderInSection to just return the header from the array (based on section)
In setEditing: iterate through the array and hide/show each button
(You could store the buttons in another array to make that easy)