在同一視圖中使用Objective-C多個委托-ECSlidingViewController

Question

我開始測試ECSlidingViewController ，在嘗試訪問FirstTopViewController之后，我遇到了很大的麻煩-因為在FirstToViewController我已經實現了ZBarReaderDelegate，並且委托的所有示例都不會從委托中觸發任何方法。

基本上我有這個東西：

FirstTopViewController.h

#import ...MyStuff...
#import "UnderRightViewController.h"

@interface FirstTopViewController : UIViewController <RightViewDelegate, ZBarReaderDelegate>

@property (weak, nonatomic) IBOutlet UITextView *labelTotal; 

@end

FirstTopViewController.m

#import "FirstTopViewController.h"

@implementation FirstTopViewController
- (void)setTotalViewController:(UnderRightViewController*)controller didTotalChange:(NSString*)total
{
    //labelTotal.text = total;
    NSLog(@"I'm here!!! and received %@", total);
}

從另一面我有

UnderRightViewController.h

#import <UIKit/UIKit.h>
#import "ECSlidingViewController.h"

@class UnderRightViewController;

@protocol RightViewDelegate <NSObject>

- (void)setTotalViewController:(UnderRightViewController*)controller didTotalChange:(NSString*)total;

@end

@interface UnderRightViewController : UITableViewController

@property (nonatomic, weak) id <RightViewDelegate> delegate;

@end

UnderRightViewController.m

#import "UnderRightViewController.h"

@interface UnderRightViewController ()

@end

@implementation UnderRightViewController

@synthesize delegate;

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    [delegate setTotalViewController:self didTotalChange:@"foo"];
}
@end

我整天都在嘗試解決這個難題，但是我從來沒有被setTotalViewController解雇。

提前致謝。

Answer 1

朋友，您犯了一個小錯誤，當時您從FirstTopViewController導航到UnderRightViewController，您需要在FirstTopViewController.m中執行此操作：

 UnderRightViewController *obj = [[UnderRightViewController
                                                                  alloc] initWithNibName:@"UnderRightViewController" bundle:nil];

obj.delegate  = self; // u forget to assign protocol handler


[self.navigationController pushViewController:obj animated:YES];


[obj release];

Answer 2

您沒有任何代碼為UnderRightViewController設置委托。 我不知道哪個對象同時擁有這兩個控制器，但是在顯示UnderRightViewController和FirstTopViewController之前，它應該運行類似以下的代碼：

FirstTopViewController *ftvc = //... where ever you get a reference to this from
UnderRightViewController *urvc = ...;
urvc.delegate = ftvc;

Answer 3

在上面的代碼中，您正在使用自定義委托，還使用它來將消息發送到一個控制器類到另一個控制器類。 因此，以下是相同的自定義委托示例代碼，它以與您必須實現的方式相似的方式很好地工作，並且代碼中的問題是您未設置委托，因此請按照以下方法進行設置並調用方法。 在這里，我使用了與您相同的方法，只是返回類型我已定義為NSString ，盡管使用void進行了解釋，但您可以根據需要使用void ，希望對您有所幫助：

第一個控制器類AWindowController.h

 @interface AWindowController : NSWindowController<sampleDelegate>

    {
        NSString *textA;
    }
    @property(readwrite,retain)NSString *textA;
    -(IBAction)doSet:(id)sender;
    @end

#import "AWindowController.h"
#import "BWindowController.h"

@interface AWindowController ()
@end
@implementation AWindowController
@synthesize textA;

- (id)initWithWindow:(NSWindow *)window
{
    self = [super initWithWindow:window];
    if (self) {
        // Initialization code here.
    }

    return self;
}

- (NSString *)setTotalViewController:(BWindowController*)controller didTotalChange:(NSString*)total
{
    NSLog(@"recieved");
    return @"recieved";
}

- (void)windowDidLoad
{
    [super windowDidLoad];

    // Implement this method to handle any initialization after your window controller's window has been loaded from its nib file.
}

-(NSString*)windowNibName
{
    return @"AWindowController";
}

-(IBAction)doSet:(id)sender
{
    [self setTextA:@"Awindow Button Pressed"];
    BWindowController *b=[[BWindowController alloc]init];
    b.delegate=self;
    [b showWindow:self];
}
@end

第二個控制器類BWindowController.h

     #import <Cocoa/Cocoa.h>
    #import "sampleDelegate.h"
    @class BWindowController;
    @protocol sampleDelegate <NSObject>
    @required
    //-(NSString *)getDataValue;
    - (NSString *)setTotalViewController:(BWindowController*)controller didTotalChange:(NSString*)total;
    @end
    @interface BWindowController : NSWindowController<sampleDelegate>
    {
        NSString *bTextValue;
        id<sampleDelegate>delegate;
    }
    @property(readwrite,retain)NSString *bTextValue;
    @property(readwrite,assign)id<sampleDelegate>delegate;
    @end


  #import "BWindowController.h"
@interface BWindowController ()

@end
@implementation BWindowController
@synthesize bTextValue,delegate;
- (id)initWithWindow:(NSWindow *)window
{
    self = [super initWithWindow:window];
    if (self) {
        // Initialization code here.
    }

    return self;
}
- (NSString *)setTotalViewController:(BWindowController*)controller didTotalChange:(NSString*)total;
{
    return nil;
}
- (void)windowDidLoad
{
    NSString *str= [[self delegate]setTotalViewController:self didTotalChange:@"recieved"];
    self.bTextValue=str;
    [super windowDidLoad];

    // Implement this method to handle any initialization after your window controller's window has been loaded from its nib file.
}

-(NSString*)windowNibName
{
    return @"BWindowController";
}

@end

輸出中附帶的屏幕截圖：-下面是AwindowController.h類的窗口

在與上面相同的窗口中的下方，按一下按鈕，當按下Awindow按鈕時，數據將發送
並使用上面定義的自定義代理在屏幕快照中在Bwindow中接收通知。