Class: Tgios::ScanQrController

Inherits:
UIViewController
  • Object
show all
Defined in:
lib/tgios/scan_qr_controller.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#types ⇒ Object

Returns the value of attribute types.



3
4
5
 
# File 'lib/tgios/scan_qr_controller.rb', line 3

def types
  @types
end

Instance Method Details

#captureOutput(captureOutput, didOutputMetadataObjects: metadataObjects, fromConnection: connection) ⇒ Object 



87
88
89
90
91
92
93
94
95
 
# File 'lib/tgios/scan_qr_controller.rb', line 87

def captureOutput(captureOutput, didOutputMetadataObjects: metadataObjects, fromConnection: connection)
  metadataObject = metadataObjects[0]

  if !@scanned && metadataObject.present?
    @scanned = true

    self.performSelectorOnMainThread('openQRCode:', withObject: metadataObject.stringValue, waitUntilDone: false)
  end
end

#dealloc ⇒ Object 



142
143
144
145
 
# File 'lib/tgios/scan_qr_controller.rb', line 142

def dealloc
  ap "#{self.class.name} dealloc"
  super
end

#fake_scan ⇒ Object 



121
122
123
124
125
126
127
128
129
 
# File 'lib/tgios/scan_qr_controller.rb', line 121

def fake_scan
  @load_view.stop_loading
  @isScanning = false
  @events[:fake_result].call do |result|
    fake_result = result
  end unless @events[:fake_result].nil?
  fake_result ||= "#{rand(100)+1}"
  openQRCode(fake_result)
end

#init ⇒ Object 



136
137
138
139
140
 
# File 'lib/tgios/scan_qr_controller.rb', line 136

def init
  super
  @events={}
  self
end

#on(event, &block) ⇒ Object 



131
132
133
134
 
# File 'lib/tgios/scan_qr_controller.rb', line 131

def on(event, &block)
  @events[event] = block.weak!
  self
end

#openQRCode(result) ⇒ Object 



97
98
99
100
101
102
 
# File 'lib/tgios/scan_qr_controller.rb', line 97

def openQRCode(result)
  stop_scanning

  @events[:result_scanned].call(result)
  self.dismissViewControllerAnimated(true, completion: nil)
end

#setupCapture ⇒ Object 



23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
 
# File 'lib/tgios/scan_qr_controller.rb', line 23

def setupCapture
  #NSLog "setCapture()"

  @session = AVCaptureSession.alloc.init
  @session.sessionPreset = AVCaptureSessionPresetHigh

  @device = AVCaptureDevice.defaultDeviceWithMediaType AVMediaTypeVideo
  @error = Pointer.new('@')
  @input = AVCaptureDeviceInput.deviceInputWithDevice @device, error: @error

  @previewLayer = AVCaptureVideoPreviewLayer.alloc.initWithSession(@session)
  @previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
  layerRect = self.view.layer.bounds
  @previewLayer.bounds = layerRect
  @previewLayer.setPosition(CGPointMake(CGRectGetMidX(layerRect), CGRectGetMidY(layerRect)))
  self.view.layer.addSublayer(@previewLayer)

  @queue = Dispatch::Queue.new('camQueue')
  @output = AVCaptureMetadataOutput.alloc.init
  @output.setMetadataObjectsDelegate self, queue: @queue.dispatch_object

  camera_size = layerRect.size
  sq_size = 240
  sq_border = 20
  line_length = 60
  border_color = :white.cgcolor(0.8)
  sq_x = (camera_size.width - sq_size) / 2
  sq_y = (camera_size.height - sq_size) / 2

  square = Base.style(CALayer.layer, {frame: [[sq_x, sq_y],[sq_size, sq_size]]})

  top_left = Base.style(CALayer.layer, frame: [[0, 0], [line_length, sq_border]], backgroundColor: border_color)
  top_right = Base.style(CALayer.layer, frame: [[sq_size-line_length, 0], [line_length, sq_border]], backgroundColor: border_color)
  left_top = Base.style(CALayer.layer, frame: [[0, sq_border], [sq_border, line_length - sq_border]], backgroundColor: border_color)
  right_top = Base.style(CALayer.layer, frame: [[sq_size - sq_border, sq_border], [sq_border, line_length - sq_border]], backgroundColor: border_color)
  left_bottom = Base.style(CALayer.layer, frame: [[0, sq_size - line_length], [sq_border, line_length - sq_border]], backgroundColor: border_color)
  right_bottom = Base.style(CALayer.layer, frame: [[sq_size - sq_border, sq_size - line_length], [sq_border, line_length - sq_border]], backgroundColor: border_color)
  bottom_left = Base.style(CALayer.layer, frame: [[0, sq_size - sq_border], [line_length, sq_border]], backgroundColor: border_color)
  bottom_right = Base.style(CALayer.layer, frame: [[sq_size-line_length, sq_size - sq_border], [line_length, sq_border]], backgroundColor: border_color)

  square.addSublayer top_left
  square.addSublayer top_right
  square.addSublayer left_top
  square.addSublayer right_top
  square.addSublayer left_bottom
  square.addSublayer right_bottom
  square.addSublayer bottom_left
  square.addSublayer bottom_right

  self.view.layer.addSublayer square

  @output.rectOfInterest = [[sq_y / camera_size.height, sq_x / camera_size.width], [sq_size / camera_size.height, sq_size / camera_size.width]]

  @session.addInput @input
  @session.addOutput @output
  @output.metadataObjectTypes = ( @types || [AVMetadataObjectTypeQRCode] )

  @isScanning = true

  @session.startRunning

  true
end

#startScanning ⇒ Object 



18
19
20
21
 
# File 'lib/tgios/scan_qr_controller.rb', line 18

def startScanning
  @load_view.stop_loading
  setupCapture
end

#stop_scanning ⇒ Object 



104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
 
# File 'lib/tgios/scan_qr_controller.rb', line 104

def stop_scanning

  NSObject.cancelPreviousPerformRequestsWithTarget(self)

  if @isScanning
    @isScanning = false

    @session.stopRunning

    @previewLayer.removeFromSuperlayer
    @previewLayer = nil

    @session = nil
  end
  self.navigationItem.leftBarButtonItem = nil
end

#viewDidLoad ⇒ Object 



5
6
7
8
9
10
11
12
13
14
15
16
 
# File 'lib/tgios/scan_qr_controller.rb', line 5

def viewDidLoad
  super
  self.view.backgroundColor = :dark_gray.uicolor
  @load_view = Tgios::LoadingView.add_loading_view_to(self.view)
  @load_view.start_loading
  if Device.simulator?
    self.performSelector('fake_scan', withObject: nil, afterDelay: 3)
  else
    self.performSelector('startScanning', withObject: nil, afterDelay: 0.5)
  end

end