在ios中仅显示一次Toast或Alert或Popup视图？

Question

I have one sample app. The application contain toast when I login the screen going to home page view load toast appear perfectly my problem is the toast show only once at homepage again comes to the homepage toast does not needed? But when I login again I need to show the toast. How can I do this. Any one give the solution.

The toast is declared on viewDidLoad :

Reachability *reachability = [Reachability reachabilityForInternetConnection];
[reachability startNotifier];
NetworkStatus status = [reachability currentReachabilityStatus];
if(status == NotReachable)
{
    NSLog(@"No Internet.");
}

else if (status == ReachableViaWiFi)
{
    wifiImage.image = [UIImage imageNamed: @"wifi_green.png"];
    [self.view makeToast:@"Wifi Is Connected" duration:3.0 position:CSToastPositionBottom];
}

else if (status == ReachableViaWWAN)
{
    ethernetImage.image = [UIImage imageNamed: @"ethernet_green.png"];
    [self.view makeToast:@"Ethernet Is Connected" duration:3.0 position:CSToastPositionBottom];
}

Answer 1

You can achieve this by saving your login state to NSUserDefaults. You can achieve same by using following steps.

1. Save bool to indicate user has logged in or not

    [[NSUserDefaults standardUserDefaults] setBool:FALSE forKey:@"LoggedIn"]; 

2. Check whether user has logged in previously or login first time and display toast accordingly.

    if([[NSUserDefaults standardUserDefaults] boolForKey:@"LoggedIn"] == FALSE) { [[NSUserDefaults standardUserDefaults] setBool:TRUE forKey:@"LoggedIn"]; //show toast } else { //hide code for previously logged in user } 

3. Clear NSUserDefault value or you can even reset it to false on logout.

    [[NSUserDefaults standardUserDefaults] setBool:FALSE forKey:@"LoggedIn"]; 

Answer 2

Store toast shown status as BOOL value in your NSUserDefaults . Check the value of that variable before showing the popup.

if([[NSUserDefaults standardUserDefaults] boolForKey:@"ToastShown"] == FALSE)
 {
      [[NSUserDefaults standardUserDefaults] setBool:TRUE forKey:@"ToastShown"];
     // add your code
}

During Logout Or in didfinishlaunching

  [[NSUserDefaults standardUserDefaults] setBool:FALSE forKey:@"ToastShown"];

Answer 3

use this three line simple code

  if([[NSUserDefaults standardUserDefaults] boolForKey:@"toast"] == FALSE)
 {
  [[NSUserDefaults standardUserDefaults] setBool:TRUE forKey:@"toast"];
  [[NSUserDefaults standardUserDefaults] synchronize];
  //Toast code will go here...
 }

Answer 4

尝试使用主线程在3秒后切换用户按钮，以显示Toast。