IOS two-dimensional code generation and sweep code detailed and example code _ios

iOS two-dimensional code generation and sweep code

Now more and more applications to join the two-dimensional code-related business, in the iOS development market, many developers are using a third party sweep code and generate a two-dimensional code of the control, the personal view of such third-party control is not high degree of recognition. Recently, just finishing up the new framework of things, studied. The specific code is as follows

Generate two-dimensional Code code

/** * @author half full, 15-12-18 * * @brief generate two-dimensional code picture * * @param code generated two-dimensional code picture content * @param width Two-dimensional code picture breadth * @param height two-dimensional code picture Height * * @return return UIImage object/-(UIImage *) Generateqrcode: (NSString *) c 
  Ode width: (cgfloat) Width height: (cgfloat) Height {ciimage *qrcodeimage; 
  NSData *data = [code datausingencoding:nsisolatin1stringencoding Allowlossyconversion:false]; 
   
  Cifilter *filter = [Cifilter filterwithname:@ "Ciqrcodegenerator"]; 
  [Filter Setvalue:data forkey:@ "InputMessage"]; 
  [Filter setvalue:@ "H" forkey:@ "Inputcorrectionlevel"]; 
   
  Qrcodeimage = [Filter outputimage]; 
  CGFloat ScaleX = width/qrcodeimage.extent.size.width; 
  CGFloat ScaleY = height/qrcodeimage.extent.size.height; Ciimage *transformedimage = [Qrcodeimage Imagebyapplyingtransform:cgaffinetransformscale (CGAffineTransformIdentity 
   
  , ScaleX, ScaleY)]; 
return [UIImage Imagewithciimage:transformedimage]; } 

  Scan two-dimensional code code

#import <AVFoundation/AVFoundation.h> static const float lightwidth = 240.F; 
static const FLOAT lightheight = 240.F; 
static const FLOAT crosslinewidth = 2.F; 
 
static const FLOAT crosslineheight = 15.F; 
  @interface Bbscancodeviewcontroller () <AVCaptureMetadataOutputObjectsDelegate> {float leftwith; 
float Topheight; 
} @property (Strong, nonatomic) Avcapturedevice *capturedevice; 
@property (Strong, nonatomic) Avcapturedeviceinput *captureinput; 
@property (Strong, nonatomic) Avcapturemetadataoutput *captureoutput; 
@property (Strong, nonatomic) avcapturesession *capturesession; 
 
@property (Strong, nonatomic) Avcapturevideopreviewlayer *capturepreview; 
@property (strong,nonatomic) UIButton *flashlightbtn; 
 
@property (strong,nonatomic) Uiimageview *lineimageview; 
@end @implementation bbscancodeviewcontroller @synthesize capturedevice = _capturedevice; 
@synthesize captureinput = _captureinput; 
@synthesize captureoutput = _captureoutput; @sYnthesize Capturepreview = _capturepreview; 
@synthesize capturesession = _capturesession; 
@synthesize delegate = _delegate; 
@synthesize Isrectscan = _isrectscan; 
@synthesize Lineimageview = _lineimageview; 
@synthesize flashlightbtn = _flashlightbtn; 
  -(void) viewdidload {[Super viewdidload]; 
  Self.isshownavigationitem = YES; 
  CGRect screenrect = [UIScreen mainscreen].bounds; 
  Leftwith = (screenrect.size.width-lightwidth)/2; 
   
Topheight = (screenrect.size.height-lightheight)/2; #if! 
Target_iphone_simulator [self initscancode]; 
  #endif [self initlayer]; 
   
   
 
  [Self Initviewcontrol]; [[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (willresignactivenotification) Name: Uiapplicationwillresignactivenotification Object:nil]; 
  Listens to trigger the home key suspend program. [[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (didbecomeactivenotification) Name: Uiapplicationdidbecomeactivenotification Object:nil]; Monitor whether to re-enter the program.
}-(void) Viewwilldisappear: (BOOL) animated {[Self stopscancode]; 
[Super viewwilldisappear:animated]; 
}-(void) willresignactivenotification {_flashlightbtn.selected = NO; 
    }-(void) Didbecomeactivenotification {}//loading the controls on the interface, such as: plus flash buttons, etc.-(void) Initviewcontrol {@autoreleasepool { 
    _FLASHLIGHTBTN = [UIButton buttonwithtype:uibuttontypecustom]; 
    [_flashlightbtn setimage:[uiimage imagenamed:@ "Openflashlight.png"] forstate:uicontrolstatenormal]; 
    [_flashlightbtn setimage:[uiimage imagenamed:@ "Closeflashlight.png"] forstate:uicontrolstateselected]; 
    _flashlightbtn.frame = CGRectMake (Leftwith, 80.F, 30.F, 30.F); 
    [_flashlightbtn addtarget:self Action: @selector (Systemflashlight) forcontrolevents:uicontroleventtouchupinside]; 
     
    [Self.view ADDSUBVIEW:_FLASHLIGHTBTN]; 
    _lineimageview = [[Uiimageview alloc] initwithimage:nil]; 
    _lineimageview.backgroundcolor = [Uicolor Greencolor]; _lineimageview.frame = CGRectMake (Leftwith,Topheight, Lightwidth, 2); 
    [Self.view Addsubview:_lineimageview]; 
  [Self scanlineanimation]; 
  }-(void) scanlineanimation {[UIView beginanimations:nil context:nil]; 
  [UIView SETANIMATIONDURATION:4.F]; 
  Set agent [UIView setanimationdelegate:self]; 
  Set the event that the animation has finished calling [UIView setanimationdidstopselector: @selector (didviewanimation)]; 
  _lineimageview.frame = CGRectMake (leftwith,topheight + lightheight-2,lightwidth,2); 
 
[UIView commitanimations]; }-(void) didviewanimation {//Self.navigationcontroller _lineimageview.frame = CGRectMake (Leftwith, TopHeight, Li 
  Ghtwidth, 2); 
[Self scanlineanimation]; 
    }-(void) Insertlayerwithframe: (CGRect) frame withbackgroundcolor: (Uicolor *) BackgroundColor {@autoreleasepool { 
    Calayer *layer = [Calayer layer]; 
    Layer.backgroundcolor = Backgroundcolor.cgcolor; 
    Layer.frame = frame; 
  [Self.view.layer Addsublayer:layer]; }///Initialize layer layer, draw semitransparent region-(void) Initlayer {//Public parameter UicoloR *fillcolor = [Uicolor colorwithred:0xae/255.f green:0xae/255.f blue:0xae/255.f alpha:0.4]; 
  Uicolor *crosscolor = [Uicolor Greencolor]; 
  CGRect screenrect = [UIScreen mainscreen].bounds; 
  [Self insertlayerwithframe:cgrectmake (0, 0, Leftwith, screenRect.size.height) Withbackgroundcolor:fillcolor]; 
  [Self insertlayerwithframe:cgrectmake (leftwith, 0, Lightwidth, topheight) Withbackgroundcolor:fillcolor]; [Self Insertlayerwithframe:cgrectmake (leftwith + lightwidth, 0, Leftwith, screenRect.size.height) withbackgroundcolor 
  : FillColor]; [Self Insertlayerwithframe:cgrectmake (leftwith, Topheight + lightheight, Lightwidth, topheight) WithBackgroundColor: 
   
   
  FillColor]; [Self Insertlayerwithframe:cgrectmake (Leftwith, Topheight, Crosslinewidth, crosslineheight) WithBackgroundColor: 
  Crosscolor]; [Self Insertlayerwithframe:cgrectmake (Leftwith, Topheight, Crosslineheight, crosslinewidth) WithBackgroundColor: 
   
  Crosscolor]; [Self Insertlayerwithframe:cgrectmake (Leftwith + LIghtwidth-crosslineheight, Topheight, Crosslineheight, Crosslinewidth) Withbackgroundcolor:crosscolor]; [Self Insertlayerwithframe:cgrectmake (leftwith + lightwidth-crosslinewidth, Topheight, Crosslinewidth, 
   
  crosslineheight) Withbackgroundcolor:crosscolor]; [Self Insertlayerwithframe:cgrectmake (leftwith, Topheight + lightheight-crosslineheight, CrossLineWidth, 
  crosslineheight) Withbackgroundcolor:crosscolor]; [Self Insertlayerwithframe:cgrectmake (leftwith, Topheight + lightheight-crosslinewidth, Crosslineheight, 
   
  Crosslinewidth) Withbackgroundcolor:crosscolor]; [Self Insertlayerwithframe:cgrectmake (leftwith + lightwidth-crosslineheight, Topheight + lightheight-crosslinewidth, 
  Crosslineheight, Crosslinewidth) Withbackgroundcolor:crosscolor]; [Self Insertlayerwithframe:cgrectmake (leftwith + lightwidth-crosslinewidth, Topheight + lightheight-crosslineheight, 
Crosslinewidth, Crosslineheight) Withbackgroundcolor:crosscolor]; 
}-(void) Initscancode {  @autoreleasepool {_capturedevice = [avcapturedevice defaultdevicewithmediatype:avmediatypevideo]; 
    _captureinput = [Avcapturedeviceinput deviceinputwithdevice: _capturedevice Error:nil]; 
    _captureoutput = [[Avcapturemetadataoutput alloc] init]; 
    [_captureoutput setmetadataobjectsdelegate:self Queue:dispatch_get_main_queue ()]; 
      if (_isrectscan) {CGRect screenrect = [UIScreen mainscreen].bounds; [_captureoutput Setrectofinterest:cgrectmake (Topheight/screenrect.size.height, Leftwith/screenrect.size.width, Li 
    Ghtheight/screenrect.size.height, Lightwidth/screenrect.size.width)]; 
    } _capturesession = [[Avcapturesession alloc] init]; 
    [_capturesession Setsessionpreset:avcapturesessionpresethigh]; 
    if ([_capturesession canaddinput: _captureinput]) {[_capturesession addinput: _captureinput]; } if ([_capturesession canaddoutput: _captureoutput]) {[_capturesession addOutput: _captureoutput]; 
     
    } _captureoutput.metadataobjecttypes = @[avmetadataobjecttypeqrcode]; 
    _capturepreview =[avcapturevideopreviewlayer layerwithsession: _capturesession]; 
    _capturepreview.videogravity = Avlayervideogravityresizeaspectfill; 
    _capturepreview.frame = Self.view.layer.bounds; 
    [Self.view.layer Insertsublayer: _capturepreview atindex:0]; 
  [_capturesession startrunning]; }}-(void) Captureoutput: ( Avcaptureoutput *) Captureoutput didoutputmetadataobjects: ( Nsarray *) metadataobjects fromconnection: ( Avcaptureconnection *) Connection {if (metadataobjects!= nil && [metadataobjects count] > 0) {Avmeta 
    Datamachinereadablecodeobject *metadataobj = [Metadataobjects objectatindex:0]; 
    NSString *scancoderesult; 
      if ([[Metadataobj type] isequaltostring:avmetadataobjecttypeqrcode]) {[Self stopscancode]; 
      Scancoderesult = Metadataobj.stringvalue; Callback Information if (_delegate && [_delegate respondstoselector: @selector (scancoderesultbyviewcontroller:withscancoderesult:)]) {[_deleg 
        Ate scancoderesultbyviewcontroller:self Withscancoderesult:scancoderesult]; 
      [Self.navigationcontroller Popviewcontrolleranimated:yes]; } else {NSLog (@) scan information Error! 
    "); }}-(void) Systemflashlight {#if! Target_iphone_simulator if ([_capturedevice hastorch] && [Self.capturedevice Hasflash]) {[_capturesessi 
    On beginconfiguration]; 
    [_capturedevice Lockforconfiguration:nil]; 
      if (_capturedevice.torchmode = = Avcapturetorchmodeoff) {_flashlightbtn.selected = YES; 
      [_capturedevice Settorchmode:avcapturetorchmodeon]; 
    [_capturedevice Setflashmode:avcaptureflashmodeon]; 
      else {_flashlightbtn.selected = NO; 
      [_capturedevice Settorchmode:avcapturetorchmodeoff]; 
    [_capturedevice Setflashmode:avcaptureflashmodeoff]; } [_capturedevice unlockforconfIguration]; 
  [_capturesession commitconfiguration]; #else [commonutil showalert:g_alerttitle withmessage:@ virtual device cannot run the camera! 
"]; 
  #endif}-(void) Stopscancode {[_capturesession stoprunning]; 
  _capturesession = nil; 
  _capturedevice = nil; 
  _captureinput = nil; 
  _captureoutput = nil; 
[_capturepreview Removefromsuperlayer]; 
}-(void) didreceivememorywarning {[Super didreceivememorywarning]; 
 } @end

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