Added support for iOS App Extensions

Now, if you add a macro to project settings, LTHPasscode doesn’t crash. Also, with a new method, you can provide the size of the view in which the LHTPasscode view is going to be presented.

Author: javitrujillo

LTHPasscodeViewController/LTHPasscodeViewController.h

@@ -313,6 +313,13 @@
  @param logoutTitle The title of the Logout button.
  */
 - (void)showLockScreenWithAnimation:(BOOL)animated withLogout:(BOOL)hasLogout andLogoutTitle:(NSString*)logoutTitle;
+/**
+ @brief				Used for displaying the lock. The passcode view is added directly on the keyWindow.
+ @param superview   The superview where is to be presented, used to measure the center of the view.
+ @param hasLogout   Set to @c YES for a navBar with a Logout button, set to @c NO for no navBar.
+ @param logoutTitle The title of the Logout button.
+ */
+- (void)showLockScreenIntoSuperview:(UIView *)superview WithAnimation:(BOOL)animated withLogout:(BOOL)hasLogout andLogoutTitle:(NSString*)logoutTitle;
 /**
  @brief				   Used for enabling the passcode.
  @details              The back bar button is hidden by default. Set @c hidesBackButton to @c NO if you want it to be visible.

LTHPasscodeViewController/LTHPasscodeViewController.m

@@ -49,7 +49,11 @@
  Any help would be greatly appreciated.
  */
 
+#if defined(LTH_APP_EXTENSIONS)
+#define LTHMainWindow [UIApplication sharedApplication].keyWindow
+#else
 #define LTHMainWindow [UIApplication sharedApplication].windows[0]
+#endif
 
 @interface LTHPasscodeViewController () <UITextFieldDelegate>
 @property (nonatomic, strong) UIView      *coverView;
@@ -1005,7 +1009,6 @@ - (void)showLockscreenWithoutAnimation {
     [self showLockScreenWithAnimation:NO withLogout:NO andLogoutTitle:nil];
 }
 
-
 - (void)showLockScreenWithAnimation:(BOOL)animated withLogout:(BOOL)hasLogout andLogoutTitle:(NSString*)logoutTitle {
     [self _prepareAsLockScreen];
 
@@ -1048,7 +1051,60 @@ - (void)showLockScreenWithAnimation:(BOOL)animated withLogout:(BOOL)hasLogout an
                                     LTHMainWindow.center.y + self.navigationController.navigationBar.frame.size.height / 2);
         }
     }
+    [UIView animateWithDuration: animated ? _lockAnimationDuration : 0 animations: ^{
+        self.view.center = newCenter;
+    }];
+    
+    // Add nav bar & logout button if specified
+    if (hasLogout) {
+        _isUsingNavBar = hasLogout;
+        [self _setupNavBarWithLogoutTitle:logoutTitle];
+    }
+}
+
+- (void)showLockScreenIntoSuperview:(UIView *)superview WithAnimation:(BOOL)animated withLogout:(BOOL)hasLogout andLogoutTitle:(NSString*)logoutTitle {
+    [self _prepareAsLockScreen];
 
+    // In case the user leaves the app while the lockscreen is already active.
+    if (_isCurrentlyOnScreen) { return; }
+    _isCurrentlyOnScreen = YES;
+    
+    [superview addSubview: self.view];
+    
+    // All this hassle because a view added to UIWindow does not rotate automatically
+    // and if we would have added the view anywhere else, it wouldn't display properly
+    // (having a modal on screen when the user leaves the app, for example).
+    [self rotateAccordingToStatusBarOrientationAndSupportedOrientations];
+    CGPoint superviewCenter = CGPointMake(superview.frame.size.width/2, superview.frame.size.height/2);
+    CGPoint newCenter;
+    [self statusBarFrameOrOrientationChanged:nil];
+    if (LTHiOS8) {
+        self.view.center = CGPointMake(self.view.center.x, self.view.center.y * -1.f);
+        newCenter = CGPointMake(superviewCenter.x,
+                                superviewCenter.y + self.navigationController.navigationBar.frame.size.height / 2);
+    }
+    else {
+        if ([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationLandscapeLeft) {
+            self.view.center = CGPointMake(self.view.center.x * -1.f, self.view.center.y);
+            newCenter = CGPointMake(superviewCenter.x - self.navigationController.navigationBar.frame.size.height / 2,
+                                    superviewCenter.y);
+        }
+        else if ([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationLandscapeRight) {
+            self.view.center = CGPointMake(self.view.center.x * 2.f, self.view.center.y);
+            newCenter = CGPointMake(superviewCenter.x + self.navigationController.navigationBar.frame.size.height / 2,
+                                    superviewCenter.y);
+        }
+        else if ([UIApplication sharedApplication].statusBarOrientation == UIInterfaceOrientationPortrait) {
+            self.view.center = CGPointMake(self.view.center.x, self.view.center.y * -1.f);
+            newCenter = CGPointMake(superviewCenter.x,
+                                    superviewCenter.y - self.navigationController.navigationBar.frame.size.height / 2);
+        }
+        else {
+            self.view.center = CGPointMake(self.view.center.x, self.view.center.y * 2.f);
+            newCenter = CGPointMake(superviewCenter.x,
+                                    superviewCenter.y + self.navigationController.navigationBar.frame.size.height / 2);
+        }
+    }
     [UIView animateWithDuration: animated ? _lockAnimationDuration : 0 animations: ^{
         self.view.center = newCenter;
     }];