[ios] Prompt for access token in ios-bench

Prompt for an access token before starting benchmarking.

/ref #4728

3 files changed, 51 insertions, 15 deletions

diff --git a/platform/ios/benchmark/MBXBenchAppDelegate.h b/platform/ios/benchmark/MBXBenchAppDelegate.h
index b8f6c2e641..e89add93fd 100644
--- a/platform/ios/benchmark/MBXBenchAppDelegate.h
+++ b/platform/ios/benchmark/MBXBenchAppDelegate.h
@@ -1,5 +1,7 @@
 #import <UIKit/UIKit.h>
 
+extern NSString * const MBXMapboxAccessTokenDefaultsKey;
+
 @interface MBXBenchAppDelegate : UIResponder <UIApplicationDelegate>
 
 @property (strong, nonatomic) UIWindow *window;
diff --git a/platform/ios/benchmark/MBXBenchAppDelegate.m b/platform/ios/benchmark/MBXBenchAppDelegate.m
index 5da6ccfcec..684c90d336 100644
--- a/platform/ios/benchmark/MBXBenchAppDelegate.m
+++ b/platform/ios/benchmark/MBXBenchAppDelegate.m
@@ -2,23 +2,23 @@
 #import "MBXBenchViewController.h"
 #import <Mapbox/Mapbox.h>
 
+NSString * const MBXMapboxAccessTokenDefaultsKey = @"MBXMapboxAccessToken";
+
 @implementation MBXBenchAppDelegate
 
 - (BOOL)application:(UIApplication*)application
     didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
-    NSString* accessToken = [[NSProcessInfo processInfo] environment][@"MAPBOX_ACCESS_TOKEN"];
-    if (accessToken) {
-        // Store to preferences so that we can launch the app later on without having to specify
-        // token.
-        [[NSUserDefaults standardUserDefaults] setObject:accessToken forKey:@"access_token"];
-    } else {
-        // Try to retrieve from preferences, maybe we've stored them there previously and can reuse
-        // the token.
-        accessToken = [[NSUserDefaults standardUserDefaults] objectForKey:@"access_token"];
-    }
-    if (!accessToken) {
-        NSLog(@"No access token set. Mapbox vector tiles won't work.");
-    } else {
+    if (![MGLAccountManager accessToken]) {
+        NSString *accessToken = [[NSProcessInfo processInfo] environment][@"MAPBOX_ACCESS_TOKEN"];
+        if (accessToken) {
+            // Store to preferences so that we can launch the app later on without having to specify
+            // token.
+            [[NSUserDefaults standardUserDefaults] setObject:accessToken forKey:MBXMapboxAccessTokenDefaultsKey];
+        } else {
+            // Try to retrieve from preferences, maybe we've stored them there previously and can reuse
+            // the token.
+            accessToken = [[NSUserDefaults standardUserDefaults] objectForKey:MBXMapboxAccessTokenDefaultsKey];
+        }
         [MGLAccountManager setAccessToken:accessToken];
     }
 
diff --git a/platform/ios/benchmark/MBXBenchViewController.mm b/platform/ios/benchmark/MBXBenchViewController.mm
index 5745a9748b..43e98d7ccd 100644
--- a/platform/ios/benchmark/MBXBenchViewController.mm
+++ b/platform/ios/benchmark/MBXBenchViewController.mm
@@ -1,5 +1,7 @@
 #import "MBXBenchViewController.h"
 
+#import "MBXBenchAppDelegate.h"
+
 #import <Mapbox/Mapbox.h>
 #import "MGLMapView_Internal.h"
 
@@ -44,10 +46,42 @@
     self.mapView.rotateEnabled = NO;
     self.mapView.userInteractionEnabled = YES;
 
-    [self startBenchmarkIteration];
-
     [self.view addSubview:self.mapView];
+}
 
+- (void)viewDidAppear:(BOOL)animated
+{
+    [super viewDidAppear:animated];
+    
+    if ([MGLAccountManager accessToken].length) {
+        [self startBenchmarkIteration];
+    } else {
+        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Access Token" message:@"Enter your Mapbox access token to load Mapbox-hosted tiles and styles:" preferredStyle:UIAlertControllerStyleAlert];
+        [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
+            textField.keyboardType = UIKeyboardTypeURL;
+            textField.autocorrectionType = UITextAutocorrectionTypeNo;
+            textField.autocapitalizationType = UITextAutocapitalizationTypeNone;
+        }];
+        
+        [alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
+            [self startBenchmarkIteration];
+        }]];
+        UIAlertAction *OKAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
+            UITextField *textField = alertController.textFields.firstObject;
+            NSString *accessToken = textField.text;
+            [[NSUserDefaults standardUserDefaults] setObject:accessToken forKey:MBXMapboxAccessTokenDefaultsKey];
+            [MGLAccountManager setAccessToken:accessToken];
+            [self.mapView reloadStyle:self];
+            
+            [self startBenchmarkIteration];
+        }];
+        [alertController addAction:OKAction];
+        
+        if ([alertController respondsToSelector:@selector(setPreferredAction:)]) {
+            alertController.preferredAction = OKAction;
+        }
+        [self presentViewController:alertController animated:YES completion:nil];
+    }
 }
 
 size_t idx = 0;