Add stats overlay to iOS AppRTCDemo.

webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallView.m

 /*
  *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #import "ARDVideoCallView.h"
 
 #import <AVFoundation/AVFoundation.h>
 #import "UIImage+ARDUtilities.h"
 
 static CGFloat const kButtonPadding = 16;
 static CGFloat const kButtonSize = 48;
 static CGFloat const kLocalVideoViewSize = 120;
 static CGFloat const kLocalVideoViewPadding = 8;
+static CGFloat const kStatusBarHeight = 20;
 
 @interface ARDVideoCallView () <RTCEAGLVideoViewDelegate>
 @end
 
 @implementation ARDVideoCallView {
   UIButton *_cameraSwitchButton;
   UIButton *_hangupButton;
   CGSize _localVideoSize;
   CGSize _remoteVideoSize;
   BOOL _useRearCamera;
 }
 
 @synthesize statusLabel = _statusLabel;
 @synthesize localVideoView = _localVideoView;
 @synthesize remoteVideoView = _remoteVideoView;
+@synthesize statsView = _statsView;
 @synthesize delegate = _delegate;
 
 - (instancetype)initWithFrame:(CGRect)frame {
   if (self = [super initWithFrame:frame]) {
     _remoteVideoView = [[RTCEAGLVideoView alloc] initWithFrame:CGRectZero];
     _remoteVideoView.delegate = self;
     [self addSubview:_remoteVideoView];
 
     // TODO(tkchin): replace this with a view that renders layer from
     // AVCaptureSession.
     _localVideoView = [[RTCEAGLVideoView alloc] initWithFrame:CGRectZero];
     _localVideoView.delegate = self;
     [self addSubview:_localVideoView];
 
+    _statsView = [[ARDStatsView alloc] initWithFrame:CGRectZero];
+    _statsView.hidden = YES;
+    [self addSubview:_statsView];
+
     // TODO(tkchin): don't display this if we can't actually do camera switch.
     _cameraSwitchButton = [UIButton buttonWithType:UIButtonTypeCustom];
     _cameraSwitchButton.backgroundColor = [UIColor whiteColor];
     _cameraSwitchButton.layer.cornerRadius = kButtonSize / 2;
     _cameraSwitchButton.layer.masksToBounds = YES;
     UIImage *image = [UIImage imageNamed:@"ic_switch_video_black_24dp.png"];
     [_cameraSwitchButton setImage:image forState:UIControlStateNormal];
     [_cameraSwitchButton addTarget:self
                       action:@selector(onCameraSwitch:)
             forControlEvents:UIControlEventTouchUpInside];
     [self addSubview:_cameraSwitchButton];
 
     _hangupButton = [UIButton buttonWithType:UIButtonTypeCustom];
     _hangupButton.backgroundColor = [UIColor redColor];
     _hangupButton.layer.cornerRadius = kButtonSize / 2;
     _hangupButton.layer.masksToBounds = YES;
     image = [UIImage imageForName:@"ic_call_end_black_24dp.png"
                             color:[UIColor whiteColor]];
     [_hangupButton setImage:image forState:UIControlStateNormal];
     [_hangupButton addTarget:self
                       action:@selector(onHangup:)
             forControlEvents:UIControlEventTouchUpInside];
     [self addSubview:_hangupButton];
 
     _statusLabel = [[UILabel alloc] initWithFrame:CGRectZero];
     _statusLabel.font = [UIFont fontWithName:@"Roboto" size:16];
     _statusLabel.textColor = [UIColor whiteColor];
     [self addSubview:_statusLabel];
+
+    UITapGestureRecognizer *tapRecognizer =
+        [[UITapGestureRecognizer alloc]
+            initWithTarget:self
+                    action:@selector(didTripleTap:)];
+    tapRecognizer.numberOfTapsRequired = 3;
+    [self addGestureRecognizer:tapRecognizer];
   }
   return self;
 }
 
 - (void)layoutSubviews {
   CGRect bounds = self.bounds;
   if (_remoteVideoSize.width > 0 && _remoteVideoSize.height > 0) {
     // Aspect fill remote video into bounds.
     CGRect remoteVideoFrame =
         AVMakeRectWithAspectRatioInsideRect(_remoteVideoSize, bounds);
@@ skipping 24 matching lines @@
     // Place the view in the bottom right.
     localVideoFrame.origin.x = CGRectGetMaxX(bounds)
         - localVideoFrame.size.width - kLocalVideoViewPadding;
     localVideoFrame.origin.y = CGRectGetMaxY(bounds)
         - localVideoFrame.size.height - kLocalVideoViewPadding;
     _localVideoView.frame = localVideoFrame;
   } else {
     _localVideoView.frame = bounds;
   }
 
+  // Place stats at the top.
+  CGSize statsSize = [_statsView sizeThatFits:bounds.size];
+  _statsView.frame = CGRectMake(CGRectGetMinX(bounds),
+                                CGRectGetMinY(bounds) + kStatusBarHeight,
+                                statsSize.width, statsSize.height);
+
   // Place hangup button in the bottom left.
   _hangupButton.frame =
       CGRectMake(CGRectGetMinX(bounds) + kButtonPadding,
                  CGRectGetMaxY(bounds) - kButtonPadding -
                      kButtonSize,
                  kButtonSize,
                  kButtonSize);
 
   // Place button to the right of hangup button.
   CGRect cameraSwitchFrame = _hangupButton.frame;
@@ skipping 21 matching lines @@
 #pragma mark - Private
 
 - (void)onCameraSwitch:(id)sender {
   [_delegate videoCallViewDidSwitchCamera:self];
 }
 
 - (void)onHangup:(id)sender {
   [_delegate videoCallViewDidHangup:self];
 }
 
+- (void)didTripleTap:(UITapGestureRecognizer *)recognizer {
+  [_delegate videoCallViewDidEnableStats:self];
+}
+
 @end