Implemented love.system.vibrate on iOS. Unfortunately due to API limitations the duration argument is ignored, and it always vibrates for roughly 0.5 seconds.

src/common/iOS.h

@@ -59,6 +59,11 @@ bool openURL(const std::string &url);
  **/
 std::string getExecutablePath();
 
+/**
+ * Causes devices with vibration support to vibrate for about 0.5 seconds.
+ **/
+void vibrate();
+
 } // ios
 } // love
 

src/common/iOS.mm

@@ -25,6 +25,8 @@
 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
 
+#import <AudioToolbox/AudioServices.h>
+
 #include <vector>
 
 #include <SDL_events.h>
@@ -321,6 +323,17 @@ std::string getExecutablePath()
 	}
 }
 
+static dispatch_queue_t queue = nil;
+static dispatch_source_t timer = nil;
+
+void vibrate()
+{
+	@autoreleasepool
+	{
+		AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
+	}
+}
+
 } // ios
 } // love