Java、Objective-Cで実行結果を非同期に取得する方法

いつもやり方を忘れてしまうのでメモ

Javaでメソッドの引数にリスナーを渡す

HogeConnection.java

private SearchWebListener searchWebListener;

public void searchWeb(String searchText, SearchWebListener _searchWebListener) {
	searchWebListener = _searchWebListener;

	
	// 時間がかかる処理を非同期で //

	searchWebListener.didFinish(CONNECTION_NO_ERROR, resultList);

}

public interface SearchWebListener {
	public void didFinish(int err, List<HogeSearchResultData> resultList);	
}

呼び出し側

Hoge.java

HogeConnection hogeConnection = new HogeConnection();
hogeConnection.searchWeb(searchText, new HogeConnection.SearchWebListener() 
	@Override
	public void didFinish(int err, List<HogeSearchResultData> _resultList) {
		if (err == HogeConnection.CONNECTION_NO_ERROR) {
		
		}
		// エラーの時の処理
		else {
							
		}					
	}
});	

または

Hoge.java

public void hogeMain() {
	HogeConnection hogeConnection = new HogeConnection();
	hogeConnection.searchWeb(searchText, new MySearchWebListener());
}

public class MySearchWebListener implements HogeConnection.SearchWebListene{
	@Override
	public void didFinish(int err, List<HogeSearchResultData> _resultList) {
		if (err == HogeConnection.CONNECTION_NO_ERROR) {
		
		}
		// エラーの時の処理
		else {
							
		}					
	}
}	

またはHoge.javaにHogeConnection.SearchWebListeneをimplementsしてもいい

Objective-CでBlocksを使う

typedef void (^TestMethodBlock)(BOOL arg1, BOOL arg2);

- (void)testMethodWithCompletion:(TestMethodBlock)_completion {

	TestMethodBlock completion = [_completion copy];

    // 別スレッド
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0),^{

        /// 時間のかかる処理 ///
        
        // メインスレッド
        dispatch_sync(dispatch_get_main_queue(), ^{
            completion(YES, YES);
        });
    });
}

呼び出

    [self testMethodWithCompletion:^(BOOL arg1, BOOL arg2) {

    }];

Objective-Cでdelegateを使った方法

HogeDelegate.h

@protocol HogeDelegate <NSObject>
- (void)didFinish:(NSArray*)_resultList;
@end

HogeConnection.h

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

@interface HogeConnection : NSObject

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

- (void)connection;

@end

HogeConnection.m

#import "HogeConnection.h"

@implementation HogeConnection

@synthesize delegate = _ delegate;

- (void)connection {
	
	// 別スレッド　時間がかかる処理
	
	[delegate didFinish:resultList];
}

@end

呼び出し側

HogeClass.h

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

@interface HogeClass. : NSObject<HogeDelegate>
@end

HogeClass.m

- (void)hogeMain {
   	HogeConnection hogeConnection = [HogeConnection alloc];
	hogeConnection.delegate = self;
	[hogeConnection connection];
}

#pragma mark - hogeConnection delegate
- (void)didFinish:(NSArray*)_resultList {

}