Add new view that renders local video using AVCaptureLayerPreview.

webrtc/examples/objc/AppRTCDemo/ios/ARDMainView.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 "ARDMainView.h"
 
 #import "UIImage+ARDUtilities.h"
 
 // TODO(tkchin): retrieve status bar height dynamically.
 static CGFloat const kStatusBarHeight = 20;
 
 static CGFloat const kRoomTextButtonSize = 40;
 static CGFloat const kRoomTextFieldHeight = 40;
 static CGFloat const kRoomTextFieldMargin = 8;
 static CGFloat const kCallControlMargin = 8;
 static CGFloat const kAppLabelHeight = 20;
 
-@class ARDRoomTextField;
-@protocol ARDRoomTextFieldDelegate <NSObject>
-- (void)roomTextField:(ARDRoomTextField *)roomTextField
-         didInputRoom:(NSString *)room;
-@end
-
 // Helper view that contains a text field and a clear button.
 @interface ARDRoomTextField : UIView <UITextFieldDelegate>
-@property(nonatomic, weak) id<ARDRoomTextFieldDelegate> delegate;
 @property(nonatomic, readonly) NSString *roomText;
 @end
 
 @implementation ARDRoomTextField {
   UITextField *_roomText;
   UIButton *_clearButton;
 }
 
-@synthesize delegate = _delegate;
-
 - (instancetype)initWithFrame:(CGRect)frame {
   if (self = [super initWithFrame:frame]) {
     _roomText = [[UITextField alloc] initWithFrame:CGRectZero];
     _roomText.borderStyle = UITextBorderStyleNone;
     _roomText.font = [UIFont fontWithName:@"Roboto" size:12];
     _roomText.placeholder = @"Room name";
+    _roomText.autocorrectionType = UITextAutocorrectionTypeNo;
+    _roomText.autocapitalizationType = UITextAutocapitalizationTypeNone;
     _roomText.delegate = self;
     [_roomText addTarget:self
                   action:@selector(textFieldDidChange:)
         forControlEvents:UIControlEventEditingChanged];
     [self addSubview:_roomText];
 
     _clearButton = [UIButton buttonWithType:UIButtonTypeCustom];
     UIImage *image = [UIImage imageForName:@"ic_clear_black_24dp.png"
                                      color:[UIColor colorWithWhite:0 alpha:.4]];
 
@@ skipping 30 matching lines @@
   size.height = kRoomTextFieldHeight;
   return size;
 }
 
 - (NSString *)roomText {
   return _roomText.text;
 }
 
 #pragma mark - UITextFieldDelegate
 
-- (void)textFieldDidEndEditing:(UITextField *)textField {
-  [_delegate roomTextField:self didInputRoom:textField.text];
-}
-
 - (BOOL)textFieldShouldReturn:(UITextField *)textField {
   // There is no other control that can take focus, so manually resign focus
   // when return (Join) is pressed to trigger |textFieldDidEndEditing|.
   [textField resignFirstResponder];
   return YES;
 }
 
 #pragma mark - Private
 
 - (void)textFieldDidChange:(id)sender {
   [self updateClearButton];
 }
 
 - (void)onClear:(id)sender {
   _roomText.text = @"";
   [self updateClearButton];
   [_roomText resignFirstResponder];
 }
 
 - (void)updateClearButton {
   _clearButton.hidden = _roomText.text.length == 0;
 }
 
 @end
 
-@interface ARDMainView () <ARDRoomTextFieldDelegate>
-@end
-
 @implementation ARDMainView {
   UILabel *_appLabel;
   ARDRoomTextField *_roomText;
   UILabel *_callOptionsLabel;
   UISwitch *_audioOnlySwitch;
   UILabel *_audioOnlyLabel;
   UISwitch *_loopbackSwitch;
   UILabel *_loopbackLabel;
   UIButton *_startCallButton;
 }
 
 @synthesize delegate = _delegate;
 
 - (instancetype)initWithFrame:(CGRect)frame {
   if (self = [super initWithFrame:frame]) {
     _appLabel = [[UILabel alloc] initWithFrame:CGRectZero];
     _appLabel.text = @"AppRTCDemo";
     _appLabel.font = [UIFont fontWithName:@"Roboto" size:34];
     _appLabel.textColor = [UIColor colorWithWhite:0 alpha:.2];
     [_appLabel sizeToFit];
     [self addSubview:_appLabel];
 
     _roomText = [[ARDRoomTextField alloc] initWithFrame:CGRectZero];
-    _roomText.delegate = self;
     [self addSubview:_roomText];
 
     UIFont *controlFont = [UIFont fontWithName:@"Roboto" size:20];
     UIColor *controlFontColor = [UIColor colorWithWhite:0 alpha:.6];
 
     _callOptionsLabel = [[UILabel alloc] initWithFrame:CGRectZero];
     _callOptionsLabel.text = @"Call Options";
     _callOptionsLabel.font = controlFont;
     _callOptionsLabel.textColor = controlFontColor;
     [_callOptionsLabel sizeToFit];
@@ skipping 88 matching lines @@
                                       CGRectGetMidY(loopbackModeRect));
 
   CGFloat startCallTop =
      CGRectGetMaxY(loopbackModeRect) + kCallControlMargin * 3;
   _startCallButton.frame = CGRectMake(kCallControlMargin,
                                       startCallTop,
                                       _startCallButton.frame.size.width,
                                       _startCallButton.frame.size.height);
 }
 
-#pragma mark - ARDRoomTextFieldDelegate
-
-- (void)roomTextField:(ARDRoomTextField *)roomTextField
-         didInputRoom:(NSString *)room {
-  [_delegate mainView:self
-         didInputRoom:room
-           isLoopback:NO
-          isAudioOnly:_audioOnlySwitch.isOn];
-}
-
 #pragma mark - Private
 
 - (void)onStartCall:(id)sender {
   NSString *room = _roomText.roomText;
   // If this is a loopback call, allow a generated room name.
   if (!room.length && _loopbackSwitch.isOn) {
     room = [[NSUUID UUID] UUIDString];
   }
   room = [room stringByReplacingOccurrencesOfString:@"-" withString:@""];
   [_delegate mainView:self
          didInputRoom:room
            isLoopback:_loopbackSwitch.isOn
           isAudioOnly:_audioOnlySwitch.isOn];
 }
 
 @end