UIActivityViewController 不在 gmail 中显示正文

Question

我正在使用 uiactivityviewcontroller 来显示共享选项。除了用户选择 Gmail 共享选项外，一切正常。如果用户选择电子邮件，则它会正确显示内容。但是，如果我选择 gmail，则正文中不会显示任何内容。

代码如下：

 NSString *str = [NSString stringWithFormat:@"%@",@"Check the application"];
 NSArray* dataToShare = @[str];  // ...or whatever pieces of data you want to share.

UIActivityViewController* activityViewController = [[UIActivityViewController alloc] initWithActivityItems:dataToShare applicationActivities:nil];
[activityViewController setValue:@"Check it out" forKey:@"subject"];

if(SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) {
    activityViewController.popoverPresentationController.sourceView = self.view;
    activityViewController.popoverPresentationController.sourceRect = CGRectMake(0,self.view.frame.size.height, self.view.frame.size.width, 400);

}

[self presentViewController:activityViewController animated:YES completion:nil];

[activityViewController setCompletionHandler:^(NSString *activityType, BOOL completed) {
    if(completed){

    }
}];
}

- (NSString *)activityViewController:(UIActivityViewController *)activityViewController subjectForActivityType:(NSString *)activityType{
    return @"Check it out";
}

Answer 1

您可以使用 URL 方案 Gmail 创建 UIActivity 的子类：

下面的代码提取了这个答案：

//ActivityViewCustomActivity.h
@interface ActivityViewCustomActivity : UIActivity

@end

//ActivityViewCustomActivity.m
@implementation ActivityViewCustomActivity

- (NSString *)activityType {
    return @"googlegmail";
}

- (NSString *)activityTitle {
    return @"Gmail";
}

- (UIImage *)activityImage {
    // Note: These images need to have a transparent background and I recommend these sizes:
    // iPadShare@2x should be 126 px, iPadShare should be 53 px, iPhoneShare@2x should be 100
    // px, and iPhoneShare should be 50 px. I found these sizes to work for what I was making.

    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
    {
        return [UIImage imageNamed:@"iPadShare.png"];
    }
    else
    {
        return [UIImage imageNamed:@"iPhoneShare.png"];
    }
}

- (BOOL)canPerformWithActivityItems:(NSArray *)activityItems {
    NSLog(@"%s", __FUNCTION__);
    return YES;
}

- (void)prepareWithActivityItems:(NSArray *)activityItems {
    NSLog(@"%s",__FUNCTION__);
}

- (UIViewController *)activityViewController {
    NSLog(@"%s",__FUNCTION__);
    return nil;
}

- (void)performActivity {
    NSString *email = @"googlegmail:///co?subject=Check it out&body=Check the application";
    email = [email stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:email]];

    [self activityDidFinish:YES];
}

@implementation ViewController2

- (void)viewDidLoad{
    [super viewDidLoad];

    NSString *textItem = @"Check the application";

    ActivityViewCustomActivity * ca = [ActivityViewCustomActivity new];

    UIActivityViewController *activityVC =
    [[UIActivityViewController alloc] initWithActivityItems:@[textItem] applicationActivities:[NSArray arrayWithObject:ca]];

    activityVC.excludedActivityTypes = @[UIActivityTypePostToWeibo, UIActivityTypeAssignToContact, UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeSaveToCameraRoll];
    [activityVC setValue:@"Check it out" forKey:@"subject"];

    activityVC.completionHandler = ^(NSString *activityType, BOOL completed)
    {
        NSLog(@" activityType: %@", activityType);
        NSLog(@" completed: %i", completed);
    };

    [self presentViewController:activityVC animated:YES completion:nil];
}

查看更多： http://www.macstories.net/links/gmail-for-ios-url-scheme/

Answer 2

Gmail 共享扩展中似乎存在错误。请检查您的 URL 是否有 &，传递 & 字符会使邮件主题和正文为空。您可以使用 & 代替。

PS: 我没有检查其他特殊字符。

Answer 3

在 Swift 3 和 iOS 9+ 中有点棘手。

首先，您需要在Info.plist

中添加googlegmail到LSApplicationQueriesSchemes

其次，这是我的 UIActivity 子类的样子：

在 Swift 3 和 iOS 9+ 中有点棘手。

首先，您需要在Info.plist

中添加googlegmail到LSApplicationQueriesSchemes

其次，这是我的 UIActivity 子类的样子：

final class GmailNewEmailShareActivity: UIActivity {

    private let urlScheme = "googlegmail:"
    private var activityItems: [Any]? = nil

    override class var activityCategory: UIActivityCategory {
        return .share
    }

    override var activityType: UIActivityType? {
        return UIActivityType(rawValue: "googlemail")
    }

    override var activityTitle: String? {
        return "Gmail"
    }

    override var activityViewController: UIViewController? {
        return nil
    }

    override func canPerform(withActivityItems activityItems: [Any]) -> Bool {
        guard let url = URL(string: urlScheme) else {
            return false
        }
        return UIApplication.shared.canOpenURL(url)
    }

    override func prepare(withActivityItems activityItems: [Any]) {
        // At this point I store incoming activity items to use them later in `perform()`
        self.activityItems = activityItems
    }

    override var activityImage: UIImage? {
        // 60x60, 120x120 and 180x180
        return nil
    }

    override func perform() {
        guard let body = activityItems?.first as? String, let encodedBody = body.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) else {
            activityDidFinish(false)
            return
        }
        let urlString = "\(urlScheme)///co?body=\(encodedBody)"
        guard let url = URL(string: urlString) else {
            activityDidFinish(false)
            return
        }
        UIApplication.shared.openURL(url)
        activityDidFinish(true)
    }

}

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