传递数据并从VC选项卡索引4转到VC选项卡索引2

Question

当我点击搜索按钮时，我希望传递数据并从Search VC（选项卡索引4）转到Classes VC（选项卡索引2）。 Search VC已嵌入Tab View Controller。 Classes VC嵌入了Tab View Controller和Navigation Controller。见附图。

我尝试在以下代码中使用seague，但我丢失了Tab Bar

假设我创建了一个名为SearchToClass的密码，从Search VC到Classes VC

#import "Search.h"    
#import "Classes.h"
#import "ClassNavigationController.h"

@interface Search(){

    NSString *sURL;
}

@end

@implementation Search

- (void)viewDidLoad
{
    [super viewDidLoad];
}

- (IBAction)btnSearch:(UIButton *)sender {

NSLog(@"This is the slider %@", lblStart.text);
sURL = @"&Start=";
sURL = [sURL stringByAppendingString:sStartTime];
sURL = [sURL stringByAppendingString:@"&End="];
sURL = [sURL stringByAppendingString:sEndTime];

[self performSegueWithIdentifier:@"SearhToClass" sender:self];

//======== I have also tried the following but couldn't pass the data and I lost the Tab Bar as well======================================
//ClassNavigationController *fromSearch =  (ClassNavigationController*)[storyboard instantiateViewControllerWithIdentifier:@"Classes"];
//[fromSearch setModalPresentationStyle:UIModalPresentationFullScreen];
//[self presentViewController:fromSearch animated:NO completion:nil];
//===================================================================
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    Classes *target = segue.destinationViewController;

    if ([segue.identifier isEqualToString:@"SearchToClass"]) {

        NSLog(@" To ClassesDet sURL : %@", sURL);
        target.urlFromSearch = sURL;
    }
 }
 @end

Answer 1

这是你能做的。如果您希望将数据从搜索vc传递到类vc。

1. 在类vc
中添加通知观察者

NotificationCenter.default
                .addObserver(forName:NSNotification
                    .Name(rawValue: "testKey"),
                             object:nil, queue:nil, using: yourMethodToBeCalled) //set notification observer

1. 当您搜索该项目并希望将其传递给类vc
时

NotificationCenter.default
            .post(name: NSNotification
                .Name(rawValue: "testKey"),
                  object: nil, userInfo: ["myData": true, "myList": myList])

1. 更改为标签
   self.tabBarController?.selectedIndex = 2

   注意：使用标签栏控制器时不需要segue