iOS-Share Extension

前言

IOS扩展主要的目的是用户能够在 app 中使用其余应用提供的功能，而无需离开当前的应用，所以能够发如今浏览图片或者是打开safari，点击分享的按钮，能够分享至不少其余的应用，这都是归功于IOS share extension扩展强大之处，据个人了解目前大部分的应用都没有实现扩展功能，因此网络上能查询到的资料不多，我也是尝试着去了解其如何使用，我今天要讲的并非如何去为应用建立一个扩展，由于网络上是有这方面的内容的，我侧重讲的自定义分享界面，由于可能系统自带的UI界面并不能知足咱们应用的要求，自定义界面是势在必行的；

 

1、如何为当前的应用添加share extension扩展，这个网络上都有操做步骤，我就再也不重复。

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

如此设置表明着，扩展的入口为CustomShareViewController（默认的是ShareViewController），接下来就是自定义布局，你能够在控制器中定义本身的UI交互，好比我作的简单的布局；

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    self.view.backgroundColor = [UIColor colorWithWhite:0 alpha:0.6];
    //定义一个容器视图来存放分享内容和两个操做按钮
    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 = @"测试";
    
    [othorView addSubview:backBut];
    
    [othorView addSubview:textView];
    
    
    testBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 300, 44)];
    UINavigationItem *ite = [[UINavigationItem alloc] initWithTitle:@"测试"];
    
    //定义Post和Cancel按钮
    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:@"发送" 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];
    
    //定义一个分享连接标签
    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];
    
    //获取分享连接
    __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];
    }
}

其实就是简单的视图切换，固然你也能够定制更加丰富的界面交互，这是跟业务需求挂钩的；

其中还须要注意的两个方法：cancelRequestWithError与completeRequestReturningItems，这个是操做必须的方法，一个是错误执行，另外一个是成功执行返回，且执行都会关闭扩展程序界面。

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

- (void)postBtnClickHandler:(id)sender
{
    //执行分享内容处理
    
    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、扩展中使用AFNetworking，网络请求确定是必须的，具体的使用与在app中使用的同样，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，特别须要注意的是，扩展中是没有[UIApplication sharedApplication]对象的，因此在操做提示界面的时候，这个是须要注意的。

 

4、提交AppStore注意事项：

（1）扩展中的处理不能太长时间阻塞主线程（建议放入线程中到处理），不然可能致使苹果拒绝你的应用。

（2）扩展不能单独提审，必需要跟容器程序一块儿提交AppStore进行审核。

（3）提审的扩展和容器程序的Build Version要保持一致，不然在上传审核包的时候会提示警告，致使程序没法正常提审。