Development of Popover's color palette app on iOS ipad _ other widgets can still interact after popover is displayed

Development of Popover's color palette app on iOS ipad _ other widgets can still interact after popover is displayed

 

I. Effect

The following is the xcode console.

Ii. Code ViewController

# Import ViewController. h # import ColorsViewController. h @ interface ViewController ()
  
   
-(IBAction) buttonClick :( UIButton *) btn; @ property (nonatomic, weak) UIButton * colorButton; @ property (nonatomic, strong) UIPopoverController * popover; @ property (weak, nonatomic) IBOutlet UIButton * greenButton;-(IBAction) greenButtonClick; @ end @ implementation ViewController-(void) viewDidLoad {[super viewDidLoad];}-(IBAction) greenButtonClick {NSLog (@ greenButtonClick);}-(IBAction) buttonClick :( UIButton *) btn {// 0. content ColorsViewController * colors = [[ColorsViewController alloc] init]; colors. delegate = self; // 1. create self. popover = [[UIPopoverController alloc] initWithContentViewController: colors]; self. popover. delegate = self; // 2. display // [self. popover presentpoverfromrect: CGRectMake (150,150,100,100) inView: btn. superview permittedArrowDirections ctions: UIPopoverArrowDirectionAny animated: YES]; [self. popover presentpoverfromrect: CGRectMake (924,668,100,100) inView: btn. superview permittedArrowDirections ctions: UIPopoverArrowDirectionAny animated: YES]; // [self. popover presentpoverfromrect: btn. bounds inView: btn permittedArrowDirections: UIPopoverArrowDirectionAny animated: YES]; // [self. popover presentpoverfromrect: btn. frame inView: btn. superview permittedArrowDirections ctions: UIPopoverArrowDirectionAny animated: YES]; // 3. set where controls can still interact with users when popover displays them. popover. passthroughViews = @ [self. greenButton]; self. colorButton = btn;} # pragma mark-color selection proxy-(void) colorsViewController :( ColorsViewController *) vc didSelectColor :( UIColor *) color {self. colorButton. backgroundColor = color; // disable popover [self. popover dismissPopoverAnimated: YES] ;}# pragma mark-popover proxy-(void) handle :( UIPopoverController *) popoverController {NSLog (@ popover destroyed);} @ end
  

ColorsViewController

#import 
  
   @class ColorsViewController;@protocol ColorsViewControllerDelegate 
   
    @optional- (void)colorsViewController:(ColorsViewController *)vc didSelectColor:(UIColor *)color;@end@interface ColorsViewController : UITableViewController@property (nonatomic, weak) id
    
      delegate;@end
    
   
  

#import ColorsViewController.h@interface ColorsViewController ()@end@implementation ColorsViewController- (void)viewDidLoad {    [super viewDidLoad];    self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}#pragma mark - Table view data source- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {    return 30;}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    static NSString *ID = @cell;    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];    if (!cell) {        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ID];        cell.selectionStyle = UITableViewCellSelectionStyleNone;    }    cell.backgroundColor = [UIColor colorWithRed:arc4random_uniform(255)/255.0 green:arc4random_uniform(255)/255.0 blue:arc4random_uniform(255)/255.0 alpha:1.0];    return cell;}- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{    if ([self.delegate respondsToSelector:@selector(colorsViewController:didSelectColor:)]) {        UIColor *color = [tableView cellForRowAtIndexPath:indexPath].backgroundColor;        [self.delegate colorsViewController:self didSelectColor:color];    }}@end