Question

好的，所以我试图将一个int传递给另一个接口，编辑int并将其返回给原始接口。我正在尝试使用委托来实现这一点，我相信我已经正确设置了它，并且看起来该方法没有被调用。

//
//  InterfaceController.h
//  DelegateTest WatchKit Extension
//
//  Created by Rohan Hodge on 20/10/2015.
//  Copyright © 2015 Hodge Development. All rights reserved.
//

#import <WatchKit/WatchKit.h>
#import <Foundation/Foundation.h>
#import "SecondController.h"

@interface InterfaceController : WKInterfaceController <DelegateTest>
{
    NSTimer *Update;
}
@property (strong, nonatomic) IBOutlet WKInterfaceLabel      *FirstControllerLabel;
@property (nonatomic,assign) int FirstInteger;
@property (nonatomic,assign) int RecievedInteger;
@property (nonatomic,assign) NSString *PassString;


@end

//  InterfaceController.m
//  DelegateTest WatchKit Extension
//
//  Created by Rohan Hodge on 20/10/2015.
//  Copyright © 2015 Hodge Development. All rights reserved.
//

#import "InterfaceController.h"


@interface InterfaceController()

@end


@implementation InterfaceController
@synthesize FirstInteger;
@synthesize RecievedInteger;
@synthesize PassString;

- (void)awakeWithContext:(id)context {
    [super awakeWithContext:context];

    // Configure interface objects here.
}
-(void)UpdateVoid
{
     self.FirstControllerLabel.text = [NSString stringWithFormat:@"%i", FirstInteger];
}

- (void)willActivate {
    SecondController *interfaceController;
    interfaceController.delegate = self;
    Update = [NSTimer timerWithTimeInterval:1.0 target:self      selector:@selector(UpdateVoid) userInfo:nil repeats:YES];

    // This method is called when watch view controller is about to be visible to user
[super willActivate];
}

- (void)didDeactivate {
    // This method is called when watch view controller is no longer   visible
    [super didDeactivate];
}

-(void)DelegateMethod:(int)ReturningInt
{
    [self popController];
    FirstInteger = ReturningInt;
    self.FirstControllerLabel.text = [NSString stringWithFormat:@"%i", FirstInteger];
}
- (IBAction)UpButton {
    FirstInteger++;
     self.FirstControllerLabel.text = [NSString stringWithFormat:@"%i", FirstInteger];
}

- (IBAction)DownButton {
    FirstInteger--;
    self.FirstControllerLabel.text = [NSString stringWithFormat:@"%i", FirstInteger];
}
- (IBAction)PassDataButton {
    PassString = [NSString stringWithFormat:@"%i", FirstInteger];
    [self pushControllerWithName:@"SecondController" context:PassString];
}

@end

//
//  SecondController.h
//  DelegateTest
//
//  Created by Rohan Hodge on 20/10/2015.
//  Copyright © 2015 Hodge Development. All rights reserved.
//

#import <WatchKit/WatchKit.h>
#import <Foundation/Foundation.h>

//This declaration of delegate.
@protocol DelegateTest <NSObject>

-(void) DelegateMethod:(int)ReturningInt;

@end

@interface SecondController : WKInterfaceController
{
    id delegate;

}
@property (nonatomic, assign) id <DelegateTest> delegate;
@property (strong, nonatomic) IBOutlet WKInterfaceLabel *SecondLabel;
@property (nonatomic,assign) NSString *RecievedString;
@property (nonatomic, assign) int FirstReceivedInteger;

@end

//
//  SecondController.m
//  DelegateTest
//
//  Created by Rohan Hodge on 20/10/2015.
//  Copyright © 2015 Hodge Development. All rights reserved.
//

#import "SecondController.h"
#import "InterfaceController.h"

@interface SecondController ()

@end

@implementation SecondController
@synthesize SecondLabel;
@synthesize FirstReceivedInteger;
@synthesize RecievedString;
@synthesize delegate = _delegate;

- (void)awakeWithContext:(id)context {
    [super awakeWithContext:context];

    //This is where I receive the int inside of a string and split it from the string so I can change it
   RecievedString = context;
   FirstReceivedInteger = [RecievedString intValue];


    // Configure interface objects here.
}

- (void)willActivate {
    self.SecondLabel.text = [NSString stringWithFormat:@"%i",FirstReceivedInteger];

    // This method is called when watch view controller is about to be visible to user
    [super willActivate];
}


- (IBAction)UpButton {
    FirstReceivedInteger++;
    self.SecondLabel.text = [NSString stringWithFormat:@"%i",FirstReceivedInteger];
}
- (IBAction)DownButton {
    FirstReceivedInteger--;
    self.SecondLabel.text = [NSString stringWithFormat:@"%i",FirstReceivedInteger];
}
  //This is a button that is ment to pass back the int.
  - (IBAction)ReturnToOriginalInterface:(id)sender{

      [self.delegate DelegateMethod:FirstReceivedInteger];

 }

 - (void)didDeactivate {
    // This method is called when watch view controller is no longer visible
    [super didDeactivate];
 }
  @end

我是Stack Overflow的新手，对于凌乱的代码格式化感到抱歉。

P.S我使用界面左上角的箭头返回原始界面。我也在使用Objective-C

提前致谢。

Answer 1

您需要在控制器中设置要更改的属性或方法（第一个控制器将更改），然后使用delegate模式返回结果。

Answer 2

你试图在Watch应用程序中执行此操作，是吗？我不知道代表是不行的，但当我为我的Watch应用程序执行此操作时，我使用了context的{{1}}参数。

WKInterfaceController::presentControllerWithName:context:是您要传递的值的NSDictionary。其中一个值可以是指向呈现控制器的指针。

因此，尝试破译您在应用中尝试的内容，我认为正确的做法是：

在 ORIGINAL WKInterfaceController：

中

context

在 OTHER WKInterfaceController：

中

- (IBAction)buttonThatOpensOtherIC
{
    NSDictionary *context = @{
                              @"firstController" : self,
                              };

    [self pushControllerWithName:@"Other IC"
                         context:context];
    }
}

*请注意在 OTHER 接口控制器中使用- (void)awakeWithContext:(id)context { [super awakeWithContext:context]; if (context) { self.originalInterfaceController = context[@"firstController"]; } } //This is the button that calls the delegate method. - (IBAction)ReturnToOriginalInterface:(id)sender { // [self.delegate DelegateMethod:FirstReceivedInteger]; if (self.originalInterfaceController) { self.originalInterfaceController.firstInteger = self.returningInt; } [self popController]; }。

免责声明＃1： 我没有执行此代码，因此可能会出现拼写错误。它适用于我使用的工作代码。

免责声明＃2： 我没有为WatchOS 2更新我的应用程序。我怀疑这部分内容已经发生了变化，但这是有可能的。

Apple Watch - Watch Kit - 未调用Delegate方法

2 个答案: