的UIViewController困难

Question

//RootViewViewController.h

#import <UIKit/UIKit.h> 
#import "SettingsViewController.h" 
#import "OneSlotViewController.h" 
#import "TwoSlotViewController.h" 
#import "BingoSlotViewController.h" 
#import "SettingsViewController.h" 

@interface RootViewViewController : UIViewController{ 

    IBOutlet UIButton *owaru; 
    OneSlotViewController *oneSlotViewController; 
    TwoSlotViewController *button2ViewController; 
    BingoSlotViewController *button3ViewController; 
    UIViewController *pushedController; 
    UIButton *hajimekara; 
    SettingsViewController *settingsVc; 


} 
@property (retain, nonatomic) UIButton *hajimekara; 
@property (strong, nonatomic) IBOutlet UIButton *owaru; 
@property (nonatomic, retain) OneSlotViewController *button1ViewController; 
@property (nonatomic, retain) TwoSlotViewController *button2ViewController; 
@property (nonatomic, retain) BingoSlotViewController *button3ViewController; 
@property (nonatomic, retain) UIViewController *pushedController; 
@property (nonatomic, retain) SettingsViewController *settingsVc; 

//RootViewViewController.m

@synthesize button1ViewController; 
@synthesize button2ViewController; 
@synthesize button3ViewController; 
@synthesize pushedController; 
@synthesize settingsVc; 


-(IBAction) startButtonPressed:(id) sender { 
    if (self.settingsVc.pushedController!=nil) { 
     NSLog(@"push"); 
     [self presentViewController:self.settingsVc.pushedController animated:YES completion:NULL]; 
    } 
} 

//SettingViewController.h

#import "OneSlotViewController.h" 
#import "TwoSlotViewController.h" 
#import "BingoSlotViewController.h" 

#import "SettingsViewController.h" 

#import "AGImagePickerController.h" 


@class RootViewViewController; 


@interface SettingsViewController : UIViewController<UINavigationControllerDelegate, UIImagePickerControllerDelegate, UIPopoverControllerDelegate,UIScrollViewDelegate>{ 


    OneSlotViewController *oneSlotViewController; 
    TwoSlotViewController *button2ViewController; 
    BingoSlotViewController *button3ViewController; 
    UIViewController *pushedController; 
    RootViewViewController *mainVc; 
    UIImageView *lastPriceView; 
    CustomImagePicker *_imagePicker; 
    UINavigationController *navController; 

} 


@property (nonatomic, retain) UIPopoverController *popoverController; 
@property (nonatomic, retain) OneSlotViewController *button1ViewController; 
@property (nonatomic, retain) TwoSlotViewController *button2ViewController; 
@property (nonatomic, retain) BingoSlotViewController *button3ViewController; 
@property (nonatomic, retain) UIViewController *pushedController; 
@property (nonatomic, retain) RootViewViewController *mainVc; 
@property (strong, nonatomic) IBOutlet UIImageView *lastPriceView; 
@property (nonatomic, retain) CustomImagePicker *imagePicker; 
@property (nonatomic, retain) IBOutlet UINavigationController *navController; 

//SettingViewController.m

-(IBAction) button1Pressed:(id)sender { 
    if (self.button1ViewController==nil) { 
     button1ViewController = [[OneSlotViewController alloc] init]; 
    } 
    self.pushedController = button1ViewController; 
} 

-(IBAction) button2Pressed:(id)sender { 
    if (self.button2ViewController==nil) { 
     button2ViewController = [[TwoSlotViewController alloc] init]; 
    } 
    self.pushedController = button2ViewController; 
} 

-(IBAction) button3Pressed:(id)sender { 
    if (self.button3ViewController==nil) { 
     button3ViewController = [[BingoSlotViewController alloc] init]; 
    } 
    self.pushedController = button3ViewController; 
} 

我已经声明有两个控制器的实例。 只要在SettingsViewController中按下按钮，它就会将ViewController传递给MainViewController的startButton。 但我似乎无法使它工作。谢谢你的帮助。

Answer 1

SettingsViewController.pushedController和MainViewController.pushedController是单独的变量。改变一个不会影响另一个。

您有两种选择。您需要将SettingsViewController存储在MainViewController中，或将MainViewController传递给SettingsViewController。

如果MainViewController保持对SettingsViewController的引用，那么你可以：

-(IBAction) startButtonPressed:(id) sender { 
    if (self.settingsViewController.pushedController!=nil) { 
     NSLog(@"push"); 
     [self presentViewController:self.settingsViewController.pushedController animated:YES completion:NULL]; 
    } 
} 

如果SettingsViewController传递给MainViewController参考，那么您可以：

-(IBAction) button1Pressed:(id)sender { 
    if (self.button1ViewController==nil) { 
     button1ViewController = [[ViewOneController alloc] init]; 
    } 
    self.mainViewController.pushedController = button1ViewController; 
} 

-(IBAction) button2Pressed:(id)sender { 
    if (self.button2ViewController==nil) { 
     button2ViewController = [[ViewTwoController alloc] init]; 
    } 
    self.mainViewController.pushedController = button2ViewController; 
} 

-(IBAction) button3Pressed:(id)sender { 
    if (self.button3ViewController==nil) { 
     button3ViewController = [[ViewThreeController alloc] init]; 
    } 
    self.mainViewController.pushedController = button3ViewController; 
} 

挑选的这些事情之一，你应该没问题。