[CRD iOS] Add support for three-finger gestures

remoting/ios/client_gestures.h

Index: remoting/ios/client_gestures.h
diff --git a/remoting/ios/client_gestures.h b/remoting/ios/client_gestures.h
index eac4f9f0dd6fafb1cd7067f2eaa055472b9a1655..2ec4ba16224dcf16bfb16cc2db43ab88b7dcc26a 100644
--- a/remoting/ios/client_gestures.h
+++ b/remoting/ios/client_gestures.h
@@ -8,6 +8,7 @@
 #import <Foundation/Foundation.h>
 #import <UIKit/UIKit.h>
 
+@class HostViewController;
 @class RemotingClient;
 
 typedef NS_ENUM(NSInteger, HostInputScheme) {
@@ -44,11 +45,12 @@ typedef NS_ENUM(NSInteger, MouseButton) {
 
   __weak UIView* _view;
   __weak RemotingClient* _client;
+  __weak HostViewController* _controller;
 
   HostInputScheme _inputScheme;
 }
 
-- (instancetype)initWithView:(UIView*)view client:(RemotingClient*)client;
+- (instancetype)initWithHostViewController:(HostViewController*)controller;

[nicholss, 2017/05/24 14:36:49]

I don't think this is a good pattern in Obj-C, you should not be sending in a
full host view controller. The correct way would be to send in the minimum class
required to show the keyboard such as an UIResponder object, or create a small
delegate class that exposes the show/hide keyboard and pass that to the client
gesture class. 

Passing HostViewController tightly couples the application to the current
implementation, which we do not want to do because it will make it hard to
adjust later.

[Yuwei, 2017/05/24 19:52:09]

Done.

 
 // Zoom in/out
 - (IBAction)pinchGestureTriggered:(UIPinchGestureRecognizer*)sender;