打开页面时出现问题（许可协议页面）

我很困扰。如何在使用应用程序时仅显示一次协议页面。我不知道如何解释这一点。但我正在尝试解释这一点。 我正在创建一个应用程序，其中有协议页面，其中有两个按钮 (1)按钮名称为Accept (2)按钮名称为拒绝

如果用户单击接受按钮应用程序进入下一页，但当用户单击拒绝按钮应用程序退出应用程序。 但转折就在这里 如果用户第一次运行此应用程序，他会看到协议页面，并且如果用户接受此协议，那么只有在他继续前进之后。但当用户多次使用该应用程序时，如果他已经接受该协议，则不得再次看到该协议页面。请帮助我如何解决这个问题，我很困惑。 提前致谢

您可以通过 Alter View 应用协议页面

and

如果用户接受协议，则您将同意的值（可能是布尔值）存储在 plist 文件（可能来自应用程序的文档目录）中，然后每次您都可以检查它

代码“不显示协议”如果接受一次

将一个 plist 文件添加到资源文件夹中
在 plist 中添加一个布尔变量 将值设置为 UNCHECKED(REJECTED STATE)

//将plist复制到文档目录

-(void)CopyPlistTODocument
  {

BOOL success;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *writableDBPath= [documentsDirectory stringByAppendingPathComponent:@"Settings.plist"];
success = [fileManager fileExistsAtPath:writableDBPath];
if (success) return;
// The writable database does not exist, so copy the default to the appropriate location.
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"Settings.plist"];
success = [fileManager copyItemAtPath:defaultDBPath toPath:writableDBPath error:&error];
if (!success) {
    NSAssert1(0, @"Failed to create writable database file with message '%@'.", [error localizedDescription]);
}

}

//NOW Call Another method that  read data form plist of document directory
      -(void)desclaimer
     {
NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectoryPath = [paths objectAtIndex:0]; 
NSString *path =[documentsDirectoryPath stringByAppendingPathComponent:@"setting.plist"]; 
NSMutableDictionary *plist = [NSMutableDictionary dictionaryWithContentsOfFile: path]; 
BOOL *temp=[plist valueForKey:@"Agreement"];
 //if the value of the temp got YES That Agreed earlier so no need to agreed again
if ([temp isEqualToString:@"NO"]) 
{
    //Show Alert View From Here  And call Method  Accept() on the button           pressed event of the accept  button
}
  }
 //Now From  Button Pressed Event Of The Accept Here is the Accept method
  -(void)Accept
    {
   NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectoryPath = [paths objectAtIndex:0]; 
NSString *path =[documentsDirectoryPath stringByAppendingPathComponent:@"Settings.plist"]; 
NSMutableDictionary *plist = [NSMutableDictionary dictionaryWithContentsOfFile: path]; 
[plist setValue:@"YES" forKey:@"Agreement"]; 
    //now every time the value read from here has agreed state so alert view will not get called
[plist writeToFile:path atomically:YES]; 

   }