iOS-Share Extension

前言

IOS擴展主要的目的是用戶能夠在 app 中使用其餘應用提供的功能，而無需離開當前的應用，所以能夠發如今瀏覽圖片或者是打開safari，點擊分享的按鈕，能夠分享至不少其餘的應用，這都是歸功於IOS share extension擴展強大之處，據個人瞭解目前大部分的應用都沒有實現擴展功能，因此網絡上能查詢到的資料不多，我也是嘗試着去了解其如何使用，我今天要講的並非如何去爲應用建立一個擴展，由於網絡上是有這方面的內容的，我側重講的自定義分享界面，由於可能系統自帶的UI界面並不能知足咱們應用的要求，自定義界面是勢在必行的；

 

1、如何爲當前的應用添加share extension擴展，這個網絡上都有操做步驟，我就再也不重複。

2、在建立好share extension中，去修改info.plist文件，如

如此設置表明着，擴展的入口爲CustomShareViewController（默認的是ShareViewController），接下來就是自定義佈局，你能夠在控制器中定義本身的UI交互，好比我作的簡單的佈局；

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    self.view.backgroundColor = [UIColor colorWithWhite:0 alpha:0.6];
    //定義一個容器視圖來存放分享內容和兩個操做按鈕
    container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 300, 175)];
    container.center = self.view.center;
    container.layer.cornerRadius = 7;
    container.layer.borderColor = [UIColor lightGrayColor].CGColor;
    container.layer.borderWidth = 1;
    container.layer.masksToBounds = YES;
    container.backgroundColor = [UIColor whiteColor];
    container.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin;
    [self.view addSubview:container];
    
    oldRect = container.frame;
    
    othorView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 300, 220)];
    othorView.center = self.view.center;
    othorView.layer.cornerRadius = 7;
    othorView.layer.borderColor = [UIColor lightGrayColor].CGColor;
    othorView.layer.borderWidth = 1;
    othorView.alpha = 0;
    othorView.layer.masksToBounds = YES;
    othorView.backgroundColor = [UIColor whiteColor];
    othorView.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin;
    [self.view addSubview:othorView];
    
    UIButton *backBut = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 65, 44)];
    [backBut setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [backBut setTitle:@"返回" forState:UIControlStateNormal];
    [backBut addTarget:self action:@selector(goBack:) forControlEvents:UIControlEventTouchUpInside];
    
    
    textView = [[UITextView alloc] initWithFrame:CGRectMake(0, 50, 200, 50)];
    textView.text = @"測試";
    
    [othorView addSubview:backBut];
    
    [othorView addSubview:textView];
    
    
    testBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 300, 44)];
    UINavigationItem *ite = [[UINavigationItem alloc] initWithTitle:@"測試"];
    
    //定義Post和Cancel按鈕
    UIButton *cancelBtn = [UIButton buttonWithType:UIButtonTypeSystem];
    [cancelBtn setTitle:@"取消" forState:UIControlStateNormal];
    cancelBtn.frame = CGRectMake(-15, 0, 65, 40);
    [cancelBtn addTarget:self action:@selector(cancelBtnClickHandler:) forControlEvents:UIControlEventTouchUpInside];
    [container addSubview:cancelBtn];
    
    UIButton *postBtn = [UIButton buttonWithType:UIButtonTypeSystem];
    [postBtn setTitle:@"發送" forState:UIControlStateNormal];
    postBtn.frame = CGRectMake(15, 0, 65, 40);
    [postBtn addTarget:self action:@selector(postBtnClickHandler:) forControlEvents:UIControlEventTouchUpInside];
    [container addSubview:postBtn];
    
    ite.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:cancelBtn];
    ite.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:postBtn];
    
    [testBar setItems:@[ite]];
    [container addSubview:testBar];
    [container addSubview:self.tableView];
    
    //定義一個分享連接標籤
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(8,
                                                               cancelBtn.frame.origin.y + cancelBtn.frame.size.height + 8,
                                                               container.frame.size.width - 16,
                                                               container.frame.size.height - 16 - cancelBtn.frame.origin.y - cancelBtn.frame.size.height)];
    label.numberOfLines = 0;
    label.textAlignment = NSTextAlignmentCenter;
    [container addSubview:label];
    
    //獲取分享連接
    __block BOOL hasGetUrl = NO;
    [self.extensionContext.inputItems enumerateObjectsUsingBlock:^(NSExtensionItem *  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
       
        [obj.attachments enumerateObjectsUsingBlock:^(NSItemProvider *  _Nonnull itemProvider, NSUInteger idx, BOOL * _Nonnull stop) {
            
            if ([itemProvider hasItemConformingToTypeIdentifier:@"public.url"])
            {
                [itemProvider loadItemForTypeIdentifier:@"public.url" options:nil completionHandler:^(id<NSSecureCoding>  _Nullable item, NSError * _Null_unspecified error) {
                   
                    if ([(NSObject *)item isKindOfClass:[NSURL class]])
                    {
                        dispatch_async(dispatch_get_main_queue(), ^{
                           
                            label.text = ((NSURL *)item).absoluteString;
                            
                        });
                    }
                    
                }];
                
                hasGetUrl = YES;
                *stop = YES;
            }
            
            *stop = hasGetUrl;
            
        }];
        
    }];
    
    for (NSString *notificationName in @[UIKeyboardWillShowNotification, UIKeyboardWillHideNotification]) {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:notificationName object:nil];
    }
}

其實就是簡單的視圖切換，固然你也能夠定製更加豐富的界面交互，這是跟業務需求掛鉤的；

其中還須要注意的兩個方法：cancelRequestWithError與completeRequestReturningItems，這個是操做必須的方法，一個是錯誤執行，另外一個是成功執行返回，且執行都會關閉擴展程序界面。

- (void)cancelBtnClickHandler:(id)sender
{
    [self.extensionContext cancelRequestWithError:[NSError errorWithDomain:@"CustomShareError" code:NSUserCancelledError userInfo:nil]];
}

- (void)postBtnClickHandler:(id)sender
{
    //執行分享內容處理
    
    coverView = [[CoverView alloc] initWithFrame:self.view.bounds];
    [self.view addSubview:coverView];
    
    [self performSelector:@selector(testAnima) withObject:nil afterDelay:0.1];
    
    //[self.extensionContext completeRequestReturningItems:@[] completionHandler:nil];
}

 

3、擴展中使用AFNetworking，網絡請求確定是必須的，具體的使用與在app中使用的同樣，如

AFHTTPSessionManager *httpClient = [AFAppHFAPIClient sharedClient];
    [httpClient GET:urlString parameters:model progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        
        if (success) {
            
            success(responseObject);
        }
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        
        if (failed) {
            
            failed(error);
        }
    }];

可是，特別須要注意的是，擴展中是沒有[UIApplication sharedApplication]對象的，因此在操做提示界面的時候，這個是須要注意的。

 

4、提交AppStore注意事項：

（1）擴展中的處理不能太長時間阻塞主線程（建議放入線程中到處理），不然可能致使蘋果拒絕你的應用。

（2）擴展不能單獨提審，必需要跟容器程序一塊兒提交AppStore進行審覈。

（3）提審的擴展和容器程序的Build Version要保持一致，不然在上傳審覈包的時候會提示警告，致使程序沒法正常提審。