ios – UIActivityViewController没有在gmail中显示正文

我正在使用uiactivityviewcontroller来显示共享选项.除非用户选择Gmail共享选项,否则一切正常.如果用户选择电子邮件,则会正确显示内容.但如果我选择gmail,那么正文中就不会显示任何内容.

这是代码：

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";
}

解决方法

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：https://stackoverflow.com/a/12766330/3726577

//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/