ios - 扩展委托(delegate)中的调用方法

Question

一般情况下是否可以从其他 IntefaceController 调用扩展委托(delegate)中的方法？

类似于:

InterfaceController *interfaceController =[[InterfaceController alloc] init]; 
interfaceController callMethod

我的界面 Controller

    #import "InterfaceController.h"
#import "OrdinaryEventRow.h"
#import <UIKit/UIKit.h> 
#import <WatchConnectivity/WatchConnectivity.h>

@interface InterfaceController()    

@implementation InterfaceController

- (void)awakeWithContext:(id)context {
    [super awakeWithContext:context];
    //Configure interface objects here.

-(void)doSomething {
    [self presentControllerWithName:@"goalView" context:nil];
}

@end

扩展代理:

#import "ExtensionDelegate.h"
#import "InterfaceController.h"
#import <WatchConnectivity/WatchConnectivity.h>
#import "setGoal.h"

@implementation ExtensionDelegate


//Handle Local Notification Actions
-(void)handleActionWithIdentifier:(NSString *)identifier forLocalNotification:(UNNotification *)localNotification{

    if([identifier isEqualToString:@"action"]){
        //Setup WCSession
        if ([WCSession isSupported]) {
            [[WCSession defaultSession] setDelegate:self];
            [[WCSession defaultSession] activateSession];

            //Get the value from slider
            NSString *someString = [[NSUserDefaults standardUserDefaults]
                                    stringForKey:@"Update"];
            NSString *Update = @"Update";
            NSDictionary *applicationData = [[NSDictionary alloc] initWithObjects:@[Update] forKeys:@[@"Update"]];
            //Send Message to the iPhone (handle over the goal value)
            [[WCSession defaultSession] sendMessage:applicationData
                                       replyHandler:^(NSDictionary *reply) {
                                           //handle reply from iPhone app here
                                       }
                                       errorHandler:^(NSError *error) {
                                           //catch any errors here
                                       }
             ];
        }
    }



//If Goal Setting was clicked
    if([identifier isEqualToString:@"action3"]){
        //here I want to call doSomething from InterfaceController

    }
}

所以我只想从 ExtensionDelegate 调用 InterfaceController 中定义的方法。

Answer 1

没有办法从ExtensionDelegate 初始化WKInterfaceController 并调用它的方法。如果您尝试调用方法的 Controller 是根 Controller ，您可以从 ExtensionDelegate 中的 WKExtension 获取 rootController 并将其转换为对其调用一个方法。

// Objective-C
if ([WKExtension shared].rootController isKindOfClass:[InitialInterfaceController class]) {
    (InitialInterfaceController *)[WKExtension shared].rootController customMethod];
}

// Swift
    if let root = WKExtension.shared().rootInterfaceController as? InitialInterfaceController {
    root.customMethod()
}

* 我的 objective-c 有点生疏，所以如果那里有语法错误，请更新或在评论中让我知道，我可以编辑。

从您的代码示例中，您正尝试根据本地通知执行操作，因此最好的办法是在界面 Controller 本身中处理通知。取决于您使用的 watchOS

watch 操作系统 3

handleAction(withIdentifier:for:) reference

watch 操作系统 2

handleAction(withIdentifier:for:) reference

关于调用这些方法的重要说明，您的扩展委托(delegate)未实现 handleAction(withIdentifier:for:) 方法，WatchKit 在您应用的根接口(interface) Controller 上调用此方法以响应通知界面中的按钮点击。