适用于iOS的带有导航功能的iOS插件，用于添加新联系人

Question

我正在为AR Unity应用制作iOS插件。当用户按下“添加联系人”按钮时，应将其导航至本机iPhone添加联系人屏幕，其中已填写了联系人详细信息。然后，用户可以确认添加新联系人并导航回到Unity App。 / p>

我已经使用directAddContact方法使功能起作用（请参见下文）。通过这种方法，可以正确添加新联系人，但是它会在后台发生，并且不会通知用户，而是会导航到本机添加联系人屏幕。

我相当确定我的代码存在以下问题：

CNContactViewController *controller = [CNContactViewController viewControllerForUnknownContact:contact];
controller.contactStore = store;
controller.delegate = self;

[self.navigationController pushViewController:controller animated:true];

我猜测ViewController和委托无法正常工作，因为Unity正在控制View。我试图研究一些论坛和教程，以通过插件通过本机ViewController覆盖UnityViewController，但我无法将其中任何一个翻译成我的特定问题。

任何其他帮助或见解将不胜感激！这是我的Unity插件“ MyPlugin.mm”的代码。

#import <Foundation/Foundation.h>
#import <Contacts/Contacts.h>
#import <ContactsUI/ContactsUI.h>
#import <UIKit/UIKit.h>

@interface MyPlugin: UIViewController<CNContactViewControllerDelegate>
{
    NSDate * creationDate;
}
@end

@implementation MyPlugin

static MyPlugin *_sharedInstance;

+(MyPlugin*) sharedInstance
{
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        NSLog(@"Creating MyPlugin shared instance");
        _sharedInstance = [[MyPlugin alloc] init];
    });
    return _sharedInstance;
}

-(void)directlyAddContact:(NSString *)firstName lastName:(NSString *)lastName email:(NSString *)email phone:(NSString *)phone {

    // Create New Contact
    CNMutableContact *contact = [[CNMutableContact alloc] init];

    // Add Name to Contact
    contact.givenName = firstName;
    contact.familyName = lastName;

    // Add Phone Number to Contact
    CNLabeledValue *workPhone = [CNLabeledValue labeledValueWithLabel:CNLabelWork value:[CNPhoneNumber phoneNumberWithStringValue:phone]];
    contact.phoneNumbers = @[workPhone];

    // Add Email to Contact

    // Save the newly created contact
    CNContactStore *store = [[CNContactStore alloc] init];
    CNSaveRequest *saveRequest = [[CNSaveRequest alloc] init];
    [saveRequest addContact:contact toContainerWithIdentifier:nil];
    NSError *error;

    NSLog(@"Added %@ %@ at %@", contact.givenName, contact.familyName, contact.phoneNumbers[0].value.stringValue);
    [store executeSaveRequest:saveRequest error:&error];
}

-(void)addContact:(NSString *)firstName lastName:(NSString *)lastName email:(NSString *)email phone:(NSString *)phone {

    // Create Store
    CNContactStore *store = [[CNContactStore alloc] init];

    // Create New Contact
    CNMutableContact *contact = [[CNMutableContact alloc] init];

    // Add Name to Contact
    contact.givenName = firstName;
    contact.familyName = lastName;

    // Add Phone Number to Contact
    CNLabeledValue *workPhone = [CNLabeledValue labeledValueWithLabel:CNLabelWork value:[CNPhoneNumber phoneNumberWithStringValue:phone]];
    contact.phoneNumbers = @[workPhone];

    // Add Email to Contact

    // Create Controller and Delegate
    CNContactViewController *controller = [CNContactViewController viewControllerForUnknownContact:contact];
    controller.contactStore = store;
    controller.delegate = self;

    [self.navigationController pushViewController:controller animated:true];
}


-(id)init
{
    self = [super init];
    return self;
}


@end

extern "C"
{
    void IOSaddContact(const char* firstName, const char* lastName, const char* email, const char* phone)
    {
        NSString *firstNameString = [[NSString alloc] initWithUTF8String:firstName];
        NSString *lastNameString = [[NSString alloc] initWithUTF8String:lastName];
        NSString *phoneString = [[NSString alloc] initWithUTF8String:phone];
        NSString *emailString = [[NSString alloc] initWithUTF8String:email];

        return [[MyPlugin sharedInstance] addContact:firstNameString lastName:lastNameString email:emailString phone:phoneString];
    }

    void IOSdirectlyAddContact(const char* firstName, const char* lastName, const char* email, const char* phone)
    {
        NSString *firstNameString = [[NSString alloc] initWithUTF8String:firstName];
        NSString *lastNameString = [[NSString alloc] initWithUTF8String:lastName];
        NSString *phoneString = [[NSString alloc] initWithUTF8String:phone];
        NSString *emailString = [[NSString alloc] initWithUTF8String:email];

        return [[MyPlugin sharedInstance] directlyAddContact:firstNameString lastName:lastNameString email:emailString phone:phoneString];
    }
}