custom font not displaying on some simulator

Follow this steps,it's work fine

1.Select the project

2.Select Targets->Build Phases->Copy Bundle Resoures->Click + Button->Add your Custom font

Like this:

My problem was that I had a fonts folder which contained my font files, and I added the file by selecting "Create folder references" instead of "Create groups".

When I did this, my fonts folder was blue (instead of yellow), and only the font folder appeared in bundle resources; the individual font files contained in the folder did not.

When I added the folder by selecting "Create groups" the individual font files were added to bundle resources and the fonts appeared in the simulator.

1. Delete application from simulator
2. Clean (by hitting "CMD + K" in Xcode)
3. Run again

Few things after including the font files in your project:

1. Include them in the target
2. Include them as bundle resources
3. Include them on your app's plist
4. Make sure you're referring to the correct font name.

You can log all fonts by putting this on your app delegate's didFinishLaunchingWithOptions:

for (NSString* family in [UIFont familyNames])
{
    NSLog(@"%@", family);

    for (NSString* name in [UIFont fontNamesForFamilyName: family])
    {
        NSLog(@"  %@", name);
    }
}

Details here: http://codewithchris.com/common-mistakes-with-adding-custom-fonts-to-your-ios-app/