iOS系統分享詳解

一、系統分享介紹

iOS系統自帶的分享功能，可以讓用戶方便地將內容分享到社交媒體、郵件、信息等各種平台上，不用一一複製、粘貼或者進入其他app。iOS系統已經為開發者提供了強大的API，可以實現分享內容的自定義和更多的個性化設置。

二、分享內容類型

在iOS系統分享中，可以分享的內容類型主要包括文字、鏈接、圖片、音頻和視頻等，下面分別介紹：

1. 文字分享

分享純文本可以調用系統自帶的分享面板，代碼實現如下：

UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:@[@"分享的文本內容"] applicationActivities:nil];
[self presentViewController:activityVC animated:YES completion:nil];

2. 鏈接分享

分享鏈接同樣也可以使用系統自帶的分享面板，代碼如下：

NSString *urlStr = @"http://www.example.com";
UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:@[[NSURL URLWithString:urlStr]] applicationActivities:nil];
[self presentViewController:activityVC animated:YES completion:nil];

3. 圖片分享

圖片分享可以使用系統提供的UIActivityViewController，並配合UIImagePickerViewController選擇圖片，代碼實現如下：

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:imagePicker animated:YES completion:nil];

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    UIImage* image = [info objectForKey:UIImagePickerControllerOriginalImage];
    NSArray *array = @[image];
    UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:array applicationActivities:nil];
    [picker dismissViewControllerAnimated:YES completion:nil];
    [self presentViewController:activityVC animated:YES completion:nil];
}

4. 音頻分享

分享音頻同樣可以使用UIActivityViewController實現，具體代碼如下：

NSArray *activityItems = @[[NSURL fileURLWithPath:self.audioPath]];
UIActivityViewController *activityController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
[self presentViewController:activityController animated:YES completion:nil];

5. 視頻分享

同樣可以使用UIActivityViewController實現視頻分享，代碼如下：

NSArray *activityItems = @[[NSURL fileURLWithPath:self.videoPath]];
UIActivityViewController *activityController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
[self presentViewController:activityController animated:YES completion:nil];

三、自定義分享

對於開發者來說，系統自帶的分享功能無法滿足需求時，可以自定義分享界面。下面介紹昵稱、頭像自定義分享：

1. 昵稱自定義

首先創建分享的item，並通過UIActivityViewController分享，代碼如下：

NSString *shareTitle = @"需要分享的標題";
UIImage *shareImage = [UIImage imageNamed:@"shareImage"];
NSURL *shareURL = [NSURL URLWithString:@"http://www.example.com"];
NSArray *activityItems = @[shareTitle, shareImage, shareURL];

WeChatSessionActivity *weChatSessionActivity = [[WeChatSessionActivity alloc]init];
WeChatTimeLineActivity *weChatTimelineActivity = [[WeChatTimeLineActivity alloc]init];

NSArray *activityArray = @[weChatSessionActivity,weChatTimelineActivity];

UIActivityViewController *activityController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:activityArray];
activityController.excludedActivityTypes = @[UIActivityTypePostToWeibo, UIActivityTypeMessage, UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll, UIActivityTypeAddToReadingList, UIActivityTypePostToFlickr, UIActivityTypePostToVimeo, UIActivityTypePostToTencentWeibo];

[self presentViewController:activityController animated:YES completion:^{
    NSLog(@"share action sheet shown");
}];

接着修改自定義的UIActivity實現，對於微信分享，可以修改WeChatSessionActivity和WeChatTimeLineActivity，在分享前彈框讓用戶輸入昵稱，代碼如下（以WeChatSessionActivity為例）：

- (UIViewController *)activityViewController{
    return nil;
}

- (NSString *)activityType{
    return NSStringFromClass([self class]);
}

- (NSString *)activityTitle{
    return @"微信好友";
}

- (UIImage *)activityImage{
    return [UIImage imageNamed:@"ActivityIcon_WechatSession"];
}

- (BOOL)canPerformWithActivityItems:(NSArray *)activityItems{
    return YES;
}

- (void)prepareWithActivityItems:(NSArray *)activityItems{
    self.title = [activityItems objectAtIndex:0];
    self.image = [activityItems objectAtIndex:1];
    self.url = [activityItems objectAtIndex:2];
}

- (void)performActivity{
    UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"請輸入微信昵稱" message:nil preferredStyle:UIAlertControllerStyleAlert];
    [alertVC addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.placeholder = @"微信昵稱";
    }];
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
    UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        WXMediaMessage *message = [WXMediaMessage message];
        message.title = self.title;
        message.description = @"";
        [message setThumbImage:self.image];
        WXWebpageObject *webpageObject = [WXWebpageObject object];
        webpageObject.webpageUrl = self.url.absoluteString;
        message.mediaObject = webpageObject;
        
        SendMessageToWXReq *req = [[SendMessageToWXReq alloc] init];
        req.bText = NO;
        req.message = message;
        req.scene = WXSceneSession;
        
        BOOL isSuccess = [WXApi sendReq:req];
        if (!isSuccess) {
            NSLog(@"微信分享失敗");
        }
        
    }];
    [alertVC addAction:cancelAction];
    [alertVC addAction:okAction];
    UIViewController *currentVC = [UIApplication sharedApplication].keyWindow.rootViewController;
    [currentVC presentViewController:alertVC animated:YES completion:nil];
}

2. 頭像自定義

同樣保存昵稱輸入的內容，代碼如下：

UIActivityViewController *activityController = [[UIActivityViewController alloc] initWithActivityItems:@[@{@"name":@"test", @"avatar":[UIImage imageNamed:@"avatar.jpg"]}] applicationActivities:nil];
[MomentsActivity registerAppSupport];
activityController.excludedActivityTypes = @[UIActivityTypePostToFacebook,
                                             UIActivityTypePostToTwitter,
                                             UIActivityTypePostToWeibo,
                                             UIActivityTypePostToVimeo,
                                             UIActivityTypePostToFlickr,
                                             UIActivityTypeMessage,
                                             UIActivityTypeMail,
                                             UIActivityTypePrint];
[self presentViewController:activityController animated:YES completion:nil];

微信朋友圈分享實現，代碼如下：

- (void)performActivity{
    UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"請輸入微信昵稱" message:nil preferredStyle:UIAlertControllerStyleAlert];
    [alertVC addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.placeholder = @"微信昵稱";
    }];
    
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
    UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        WXMediaMessage *message = [WXMediaMessage message];
        message.title = @"微信朋友圈";
        
        // 設置描述
        message.description = @"";
        UIImage *shareImage = [UIImage imageNamed:@"avatar.jpg"];
        [message setThumbImage:shareImage];
        
        WXImageObject *imageObject = [WXImageObject object];
        imageObject.imageData = UIImageJPEGRepresentation(shareImage, 0.5);
        message.mediaObject = imageObject;
        
        SendMessageToWXReq *req = [[SendMessageToWXReq alloc] init];
        req.bText = NO;
        req.message = message;
        req.scene = WXSceneTimeline;
        [WXApi sendReq:req];
    }];
    
    [alertVC addAction:cancelAction];
    [alertVC addAction:okAction];
    UIViewController *currentVC = [UIApplication sharedApplication].keyWindow.rootViewController;
    [currentVC presentViewController:alertVC animated:YES completion:nil];
}

四、總結

iOS系統分享功能能夠方便地將內容分享到多個社交媒體、郵件、信息等平台上。系統自帶的UIActivityViewController提供了功能齊全的默認分享面板，而自定義分享方式可以大大提高用戶體驗。開發者可以根據需求選擇對應的分享方式來滿足分享需求。

原創文章，作者：TNKLT，如若轉載，請註明出處：https://www.506064.com/zh-hk/n/361134.html