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PONot able to make PopOver menu in iOS
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  1. PONot able to make PopOver menu in iOS
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    copied!<p>I want to display a popover menu on button click. It is giving me exception when i tried this code, i am not able to figure it out. here is the code of popViewController which is subclass of UITableViewController</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @protocol popdelegate &lt;NSObject&gt; @required -(void) getdata; @end @interface popViewController : UITableViewController @property (nonatomic, strong) NSMutableArray *array; @property (nonatomic, weak) id&lt;popdelegate&gt; delegate; @end </code></pre> <p>This is the implementation of popViewController.m</p> <pre><code>#import "popViewController.h" @interface popViewController () @end @implementation popViewController - (id)initWithStyle:(UITableViewStyle)style { self = [super initWithStyle:style]; if (self) { _array = [NSMutableArray alloc]; [_array addObject:@"New"]; [_array addObject:@"Open"]; [_array addObject:@"Shape"]; NSInteger rowsCount = [_array count]; NSInteger singleRowHeight = [self.tableView.delegate tableView:self.tableView heightForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]]; NSInteger totalRowsHeight = rowsCount * singleRowHeight; CGFloat largestLabelWidth = 0; for (NSString *colorName in _array) { CGSize labelSize = [colorName sizeWithFont:[UIFont boldSystemFontOfSize:20.0f]]; if (labelSize.width &gt; largestLabelWidth) { largestLabelWidth = labelSize.width; } } CGFloat popoverWidth = largestLabelWidth + 100; self.contentSizeForViewInPopover = CGSizeMake(popoverWidth, totalRowsHeight); } return self; } - (void)viewDidLoad { [super viewDidLoad]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [_array count]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } // Configure the cell... cell.textLabel.text = [_array objectAtIndex:indexPath.row]; // Configure the cell... return cell; } @end </code></pre> <p>Next is the code of my ViewController.h</p> <pre><code>#import &lt;UIKit/UIKit.h&gt; #import "popViewController.h" @interface ViewController : UIViewController&lt;popdelegate&gt; @property (nonatomic, strong) popViewController *popmenu; @property (nonatomic, strong) UIPopoverController *controller; -(IBAction)pop:(id)sender; @end </code></pre> <p>And finally the ViewController.m</p> <pre><code>#import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; } -(IBAction)pop:(id)sender { if (_popmenu == nil) { _popmenu = [[popViewController alloc] initWithStyle:UITableViewStylePlain]; _popmenu.delegate = self; } if (_controller == nil) { _controller = [[UIPopoverController alloc] initWithContentViewController:_popmenu]; [_controller presentPopoverFromBarButtonItem:(UIBarButtonItem *)sender permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES]; } else { [_controller dismissPopoverAnimated:YES]; _controller = nil; } } - (void) getdata{ } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end </code></pre> <p>When i run this and click on button which is supposed to show the menu, at that time i am getting an exception which i am not able to resolve. Please help me i am new to ios programming.</p>
 

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