将应用程序优先时弹出警报设置 Opens/Let 用户在应用程序密码中设置

Question

无法在用户首次打开应用程序时弹出提醒。我希望每个视图都有不同的警报，以引导用户完成他们的第一个运行.

我不知道我错过了什么。浏览了网站上的各种帖子，无法弄清楚。

ViewController.h

    #import <UIKit/UIKit.h>



@interface ViewController : UIViewController <UINavigationControllerDelegate,UIImagePickerControllerDelegate> {

}

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end



@implementation ViewController


- (void)viewdDidLoad {
    [super viewDidLoad];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    if(![[NSUserDefaults standardUserDefaults] boolForKey:@"AlreadyRan"] )
    {
        UIAlertController * alert=   [UIAlertController
                                      alertControllerWithTitle:@"The Key"
                                      message:@"Press The Key Hole"
                                      preferredStyle:UIAlertControllerStyleAlert];

        UIAlertAction* ok = [UIAlertAction
                             actionWithTitle:@"OK"
                             style:UIAlertActionStyleDefault
                             handler:^(UIAlertAction * action)
                             {
                                 [alert dismissViewControllerAnimated:YES completion:nil];

                             }];
        UIAlertAction* cancel = [UIAlertAction
                                 actionWithTitle:@"Cancel"
                                 style:UIAlertActionStyleDefault
                                 handler:^(UIAlertAction * action)
                                 {
                                     [alert dismissViewControllerAnimated:YES completion:nil];

                                 }];

        [alert addAction:ok];
        [alert addAction:cancel];

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

        [[NSUserDefaults standardUserDefaults] setBool:TRUE forKey:@"AlreadyRan"];
    }
    return 0;
}



@end

另外，在另一个视图控制器上，我希望用户能够在应用程序首次运行时通过警报弹出窗口设置密码运行。这是我将密码设置为标准密码的代码。密码不需要存储到钥匙串，不是那种我只是希望应用程序将其保存在本地的应用程序。

通过ViewController.m

- (IBAction)enterPassword {
    NSString *passwordString = [NSString stringWithFormat:@"1234"];

    if ([passwordField.text isEqualToString:passwordString]) {
        //Password is Correct
        NSString * storyboardName = @"Main";
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
        UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:@"PhotoView"];
        [self presentViewController:vc animated:YES completion:nil];

    }


    else {
        //Password is wrong
        [self dismissViewControllerAnimated:YES completion: nil];

}
}

Answer 1

您已经在视图控制器中实现了 (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions，但实际上此方法属于 UIApplicationDelegate 协议（通常位于您的 AppDelegate.m 中）。

所以iOS永远不会调用这个方法。

我想你要找的是-(void) viewDidAppear: (BOOL) animated { ... }。当视图控制器出现在屏幕上时，它会被调用。所以你的实现看起来像

-(void) viewDidAppear: (BOOL) animated {
    [super viewDidAppear: animated];
    /* All your other code that used to be in didFinishLaunchingWithOptions */
}

将应用程序优先时弹出警报设置 Opens/Let 用户在应用程序密码中设置

Set Alert to Pop when App first Opens/Let User Set in App Password

objective-c

uialertview

ios