CODEWITHSUNDEEP
iosobjective-cuiviewuialertview
Eddie
Eddie

Reputation: 1009

UIView, animate, completionblock, UIAlertView

I have an app with a login screen that hosts a sign in button and a sign up button, using reachibility if I detect that I can't reach the internet I hide those buttons by showing a covering view 

 self.coveringview

Now I do some simple animation playing with the alpha of this view, once that is done, I want an alertview to popup to tell the user what happen, in this code you can see I am doing that by having the alert.show in the completion block of the animatewithduration.

the bahvior is not what I want, the alert pops up too fast without showing the user the fade out I want it to show, what can I do?

NetworkStatus netStatus = [reachability currentReachabilityStatus];
if(netStatus == NotReachable) {
   UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No Internet Connection"
                                                  message:@"Unable to connect to the server.  
     Please check your internet connection and try again."
                                                 delegate:self
                                        cancelButtonTitle:nil
                                        otherButtonTitles:@"OK", nil];
  [UIView animateWithDuration:1.0
                         animations:^{
                                self.coveringView.alpha = 1.0;
                         }completion:^(BOOL finished) {
                             // this is the problem here, I need to make this alert show up after  
                             the fade out occurs completely
                             [alert show];
                             self.coveringView.hidden = NO;
                         }];
}
else {
  [UIView animateWithDuration:1.0
                   animations:^{
                      self.coveringView.alpha = 0.0;
                   }completion:^(BOOL finished) {
                      self.coveringView.hidden = YES;
                   }];
}

Upvotes: 1

Views: 629

Answers (2)

Mirko Catalano
Mirko Catalano

Reputation: 3850

remove your self.coveringView.hidden = YES from your Interface Builder and set just alpha = 0

NetworkStatus netStatus = [reachability currentReachabilityStatus];
if(netStatus == NotReachable) {
   UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No Internet Connection"
                                                  message:@"Unable to connect to the server.  
     Please check your internet connection and try again."
                                                 delegate:self
                                        cancelButtonTitle:nil
                                        otherButtonTitles:@"OK", nil];

    [UIView animateWithDuration:1.0
                     animations:^{
                            self.coveringView.alpha = 1.0;
                     }completion:^(BOOL finished) {
                         // this is the problem here, I need to make this alert show up after  the fade out occurs completely
                      if(finished){
                         [alert show];
                      }
                     }];                     



}
else {
  [UIView animateWithDuration:1.0
                   animations:^{
                      self.coveringView.alpha = 0.0;
                   }completion:^(BOOL finished) {
                      if(finished){
                      self.coveringView.hidden = YES;
                      }
                   }];

Upvotes: 1

HalR
HalR

Reputation: 11083

You don't need to use both setHidden and an alpha of 0.0 They both will make the view so that it doesn't intercept touches. Your hidden/notHidden is likely conflicting with the alpha changes.

Try simplifying like this:

NetworkStatus netStatus = [reachability currentReachabilityStatus];
if(netStatus == NotReachable) {
   UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No Internet Connection"
                                                  message:@"Unable to connect to the server.  
     Please check your internet connection and try again."
                                                 delegate:self
                                        cancelButtonTitle:nil
                                        otherButtonTitles:@"OK", nil];
  [UIView animateWithDuration:1.0
                         animations:^{
                                self.coveringView.alpha = 1.0;
                         }completion:^(BOOL finished) {
                             //I need to make this alert show up after the fade out occurs completely
                             [alert show];
                         }];
}
else {
  [UIView animateWithDuration:1.0
                   animations:^{
                      self.coveringView.alpha = 0.0;
                   }completion:^(BOOL finished) {
                   }];
}

Upvotes: 0

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