如何从嵌入式表视图中调用RootViewController中的操作？

时间：2013-10-30 15:27:47

标签： ios delegation

我有一个故事板应用程序，在根视图控制器上的容器中嵌入了表视图。用户将在嵌入式表视图中通过弹出窗口进行一些选择。完成所有选择后，我希望根视图控制器视图中的NEXT按钮被激活（不变暗），以便用户可以触摸它。

当我可以完成这项工作时，我在RootViewController中放了一个动作 - 检查所有值是否已归档并且如果它们是，则取消按钮，如果它们是音符则调暗它。但是我怎么称呼这个动作呢？我有代表，只要用户做出选择就会被解雇，所以看起来他就是我称之为行动的地方，但它不可用。

非常感谢任何帮助。

布赖恩

以下是一些代码：

#import <UIKit/UIKit.h>
//#import "popViewController.h"
#import "pvcProteinIntendedFor.h"
#import "pvcProteinNotOriginateFrom.h"
#import "pvcProteinTaste.h"
#import "pvcProteinPrice.h"
#import "userInputs.h"

@interface embeddedTableViewController : UITableViewController <UITableViewDataSource,UITableViewDelegate,pvcProteinIntendedForDelegate,pvcProteinTasteDelegate,pvcProteinPriceDelegate,pvcProteinNotOriginateFromDelegate>

@property(strong, nonatomic) UIButton *test;

@property(nonatomic, strong) UIButton *parentNextButton;

//Buttons for pop
@property (weak, nonatomic) IBOutlet UIButton *btnProteinIntendedFor;
@property (weak, nonatomic) IBOutlet UIButton *btnProteinNotOriginateFrom;
@property (weak, nonatomic) IBOutlet UIButton *btnProteinTaste;
@property (weak, nonatomic) IBOutlet UIButton *btnProteinPrice;

//Propert for the current PopPover  - this will change to one popover
//@property (strong, nonatomic) popViewController* currentPopoverController;
@property (strong, nonatomic) UIStoryboardPopoverSegue *segPopViewController;

//The button action
//This is to keep track of which button we came from
//@property (weak, nonatomic) IBOutlet UIButton* currentButton;

// Access Protein Intended For
@property (strong, nonatomic) UIStoryboardPopoverSegue *pvcSegueProteinIntendedFor;
@property (strong, nonatomic) pvcProteinIntendedFor *pvcProteinIntendedFor;

// Access Protein Not Orignate From
@property (strong, nonatomic) UIStoryboardPopoverSegue         *pvcSegueProteinNotOriginateFrom;
 @property (strong, nonatomic) pvcProteinNotOriginateFrom *pvcProteinNotOriginateFrom;

// Access Protein Taste
@property (strong, nonatomic) UIStoryboardPopoverSegue *pvcSegueProteinTaste;
@property (strong, nonatomic) pvcProteinTaste *pvcProteinTaste;

// Access Protein Price
@property (strong, nonatomic) UIStoryboardPopoverSegue *pvcSegueProteinPrice;
@property (strong, nonatomic) pvcProteinPrice *pvcProteinPrice;

@end

以下是实施文件：

#import "embeddedTableViewController.h"
//#import "popViewController.h"
#import "pvcProteinIntendedFor.h"
#import "pvcProteinNotOriginateFrom.h"
#import "pvcProteinTaste.h"
#import "pvcProteinPrice.h"
#import "userInputs.h"
#import "myDataController.h"

@interface embeddedTableViewController ()

//@property(nonatomic, strong) UIButton *parentNextButton;

@end

@implementation embeddedTableViewController

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];


}

- (void)viewDidAppear:(BOOL)animated
{

    //For Testing
    [self.btnProteinIntendedFor setTitle:@"Bakery" forState:UIControlStateNormal];
    [self.btnProteinNotOriginateFrom setTitle:@"China" forState:UIControlStateNormal];
    [self.btnProteinPrice setTitle:@"Extremely Important" forState:UIControlStateNormal];
    [self.btnProteinTaste setTitle:@"Somewhat Important" forState:UIControlStateNormal];
    myDataController *dataController = [myDataController sharedDataController];
    dataController.proteinIsIntendedFor = @"Bakery";
    dataController.proteinNotOriginate = @"China";
    dataController.proteinHowImportantIsPrice = @"Extremely Important";
    dataController.proteinHowImportantIsTaste = @"Somewhat Important";

}


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{

    if ([[segue identifier] isEqualToString:@"segPopProteinIntendedFor"]) {
        _pvcSegueProteinIntendedFor = (UIStoryboardPopoverSegue *)segue;
        _pvcProteinIntendedFor = [segue destinationViewController];
        [_pvcProteinIntendedFor setDelegate:self];
        }
    else if ([[segue identifier] isEqualToString:@"segPopProteinNotOriginateFrom"]) {
        _pvcSegueProteinNotOriginateFrom = (UIStoryboardPopoverSegue *)segue;
        _pvcProteinNotOriginateFrom = [segue destinationViewController];
        [_pvcProteinNotOriginateFrom setDelegate:self];
    }
    else if ([[segue identifier] isEqualToString:@"segPopProteinTaste"]) {
        _pvcSegueProteinTaste = (UIStoryboardPopoverSegue *)segue;
        _pvcProteinTaste = [segue destinationViewController];
        [_pvcProteinTaste setDelegate:self];
    }
    else if ([[segue identifier] isEqualToString:@"segPopProteinPrice"]) {
        _pvcSegueProteinPrice = (UIStoryboardPopoverSegue *)segue;
        _pvcProteinPrice = [segue destinationViewController];
        [_pvcProteinPrice setDelegate:self];
    }

}

- (void)dismissPopViewController:(NSString *)value{
    [self.btnProteinIntendedFor setTitle:value forState:UIControlStateNormal];
    [[_pvcSegueProteinIntendedFor popoverController] dismissPopoverAnimated: YES];
    myDataController *dataController = [myDataController sharedDataController];
    dataController.proteinIsIntendedFor= value;
    //[self checkFields];
}

- (void)dismissPopProteinIntendedFor:(NSString *)value{
    [self.btnProteinIntendedFor setTitle:value forState:UIControlStateNormal];
    [[_pvcSegueProteinIntendedFor popoverController] dismissPopoverAnimated: YES];
    myDataController *dataController = [myDataController sharedDataController];
    dataController.proteinIsIntendedFor= value;
    //[self checkFields];
}

- (void)dismissPopProteinNotOriginateFrom:(NSString *)value {

    [_btnProteinNotOriginateFrom setTitle:value forState:UIControlStateNormal];
    [[_pvcSegueProteinNotOriginateFrom popoverController] dismissPopoverAnimated: YES]; // dismiss the popover
    myDataController *dataController = [myDataController sharedDataController];
    dataController.proteinNotOriginate = value;
    //[self checkFields];
    }

- (void)dismissPopProteinTaste:(NSString *)value {

    [_btnProteinTaste setTitle:value forState:UIControlStateNormal];
    [[_pvcSegueProteinTaste popoverController] dismissPopoverAnimated: YES]; // dismiss the popover
    myDataController *dataController = [myDataController sharedDataController];
    dataController.proteinHowImportantIsTaste = value;
    //[self checkFields];
}

- (void)dismissPopProteinPrice:(NSString *)value {

    [_btnProteinPrice setTitle:value forState:UIControlStateNormal];
    [[_pvcSegueProteinPrice popoverController] dismissPopoverAnimated: YES]; // dismiss the popover
    myDataController *dataController = [myDataController sharedDataController];
    dataController.proteinHowImportantIsPrice = value;
    //[self checkFields];
}

-(IBAction)doSomething:(id)sender
{
    self.parentNextButton.enabled = YES;
}


@end

查看控制器：

#import <UIKit/UIKit.h>
#import "resultViewController.h"
#import "userInputs.h"
#import "embeddedTableViewController.h"

@interface rootViewController : UIViewController

@property IBOutlet UISwitch *yesNoSwitch;
@property (strong, nonatomic) IBOutlet UIButton *btnNext;
@property (strong, nonatomic) UIStoryboardPopoverSegue *rcvSegueResults;
@property (strong, nonatomic) resultViewController *rvcResults;
@property (strong, nonatomic) userInputs *userInputs;

- (IBAction)unwindResults:(UIStoryboardSegue *)unwindSegue;
- (IBAction)editingChanged:(id)sender;
- (IBAction)switchChanged: sender;

@end

实施

#import "rootViewController.h"
#import "myDataController.h"
#import "embeddedTableViewController.h"

@interface rootViewController ()


@end

@implementation rootViewController


-(void)viewWillAppear:(BOOL)animated
{
    //self.eTableViewController.parentNexButton = self.btnNext;
    //[self.eTableViewController parentNextButton] = self.btnNext;

}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    //self.eTableViewController = segue.destinationViewController;
}


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {

    }
    return self;
}


- (void)viewDidLoad
{
    [super viewDidLoad];
    self.title = @"Pick a Protein Choices";
}

- (void)viewDidAppear:(BOOL)animated
{

}

- (void)viewDidUnload
{
    [super viewDidUnload];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];

}



- (BOOL)prefersStatusBarHidden {
    return YES;
}



-(IBAction)switchChanged:(UISwitch *) sender {
    BOOL setting = sender.isOn;
    [self.yesNoSwitch setOn:setting animated:YES];
    myDataController *dataController = [myDataController sharedDataController];
    if (self.yesNoSwitch.isOn) {
        dataController.proteinMustBeOrganic = YES;
    }
    else
    {
    dataController.proteinMustBeOrganic = NO;
    }
}

//Unwind from Results to Inputs
- (IBAction)unwindResults:(UIStoryboardSegue *)unwindSegue
{
}


//Fire this whenever come back from editing; check to see if we should undim button
- (IBAction)editingChanged:(id)sender {

   //*btnNext;

}

@end

好的我还有问题。我道歉，我确信这是愚蠢的。

rootViewController.h 

#import <UIKit/UIKit.h>
#import "resultViewController.h"
#import "userInputs.h"
#import "embeddedTableViewController.h"

@interface rootViewController : UIViewController

@property IBOutlet UISwitch *yesNoSwitch;
@property (strong, nonatomic) IBOutlet UIButton *btnNext;
@property (strong, nonatomic) UIStoryboardPopoverSegue *rcvSegueResults;
@property (strong, nonatomic) resultViewController *rvcResults;
@property (strong, nonatomic) userInputs *userInputs;

- (IBAction)unwindResults:(UIStoryboardSegue *)unwindSegue;
- (IBAction)editingChanged:(id)sender;
- (IBAction)switchChanged: sender;

@end

rootViewController.m [只是顶部] 

#import "rootViewController.h"
#import "myDataController.h"
#import "embeddedTableViewController.h"

@interface rootViewController ()

@property(strong, nonatomic) UITableViewController *eTableViewController;

@end

@implementation rootViewController


-(void)viewWillAppear:(BOOL)animated
{

    //self.eTableViewController.parentNexButton = self.btnNext;


}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    self.eTableViewController = segue.destinationViewController;
}

embeddedTableViewController.h [顶部] 

#import <UIKit/UIKit.h>
#import "pvcProteinIntendedFor.h"
#import "pvcProteinNotOriginateFrom.h"
#import "pvcProteinTaste.h"
#import "pvcProteinPrice.h"
#import "userInputs.h"

@interface embeddedTableViewController : UITableViewController
<UITableViewDataSource,UITableViewDelegate,pvcProteinIntendedForDelegate,pvcProteinTasteDelegate,pvcProteinPriceDelegate,pvcProteinNotOriginateFromDelegate>

@property(nonatomic, strong) UIButton *parentNextButton;

//Buttons for pop
@property (weak, nonatomic) IBOutlet UIButton *btnProteinIntendedFor;
@property (weak, nonatomic) IBOutlet UIButton *btnProteinNotOriginateFrom;
@property (weak, nonatomic) IBOutlet UIButton *btnProteinTaste;
@property (weak, nonatomic) IBOutlet UIButton *btnProteinPrice;

embeddedTableViewController.m 

#import "embeddedTableViewController.h"
#import "pvcProteinIntendedFor.h"
#import "pvcProteinNotOriginateFrom.h"
#import "pvcProteinTaste.h"
#import "pvcProteinPrice.h"
#import "userInputs.h"
#import "myDataController.h"

@interface embeddedTableViewController ()

@end

@implementation embeddedTableViewController


-(IBAction)doSomething:(id)sender
{
    self.parentNextButton.enabled = YES;
}

我得到的错误是这行代码：

//self.eTableViewController.parentNexButton = self.btnNext;

，错误是

在'UITableViewController *'类型的对象上找不到属性'parentNextButton'

我认为这告诉我eTableViewController没有“看到”文件，因此无法获取该属性。

2 个答案:

答案 0 :(得分：1)

这样的事情应该有效：

#import "ParentViewController.h"
#import "EmbeddedTableViewController.h"

@interface ParentViewController ()

@property(strong, nonatomic) EmbeddedTableViewController *eTableViewController;

@end

@implementation ParentViewController

-(void)viewWillAppear:(BOOL)animated
{
    self.eTableViewController.parentNextButton = self.nextButton;
}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    self.eTableViewController = segue.destinationViewController;
}

@end



@interface EmbeddedTableViewController : UITableViewController

@property(nonatomic, strong) UIButton *parentNextButton;

@end



#import "EmbeddedTableViewController.h"

@interface EmbeddedTableViewController ()

@end

@implementation EmbeddedTableViewController

-(IBAction)doSomething:(id)sender
{
    self.parentNextButton.enabled = YES;
}

@end

基本上，您从父视图控制器中的prepareForSegue委托调用中的embed segue捕获EmbeddedTableViewController，然后在viewDidAppear中，将tableview控制器中的parentNextButton设置为parent nextButton。这将负责下一个按钮的启用/取消启用。

至于你在“RootViewController中的操作”，你对我想要做的事情的描述对我来说有点不清楚。我猜测要填写的值在表视图中。如果是这样，将所有逻辑放在嵌入式tableview控制器中，并根据需要切换下一个按钮的启用状态。

答案 1 :(得分：0)

每当遇到这类问题时，我都会用事件解决它。

  1. 使用NSNotificationCenter从您的代理发布活动
  2. 在RootViewController中为该事件添加一个侦听器。
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