IOS 二维码
生成二维码
导入CoreImage 库
#import 扫描二维码
导入AVFoundation 库
遵守
#define AUTH_ALERT_TAG (int)281821
#define ScreenHeight [UIScreen mainScreen].bounds.size.height
#define ScreenWidth [UIScreen mainScreen].bounds.size.width
@interface QRCodeController ()<AVCaptureMetadataOutputObjectsDelegate, UIAlertViewDelegate>
{
AVCaptureSession * session;//输入输出的中间桥梁
int line_tag;
UIView *highlightView;
NSDictionary * _resultDic;
NSArray *_buddies;
}
@end
@implementation QRCodeController
/** * @author Whde * * viewDidLoad */
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
[self instanceDevice];
[VCUtil addTitleView:self :@"添加好友"];
//[VCUtil addBackBtnInNavigation:self];
}
- (void)instanceDevice{
line_tag = 1872637;
//获取摄像设备
AVCaptureDevice * device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
//创建输入流
AVCaptureDeviceInput * input = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];
//创建输出流
AVCaptureMetadataOutput * output = [[AVCaptureMetadataOutput alloc]init];
//设置代理 在主线程里刷新
[output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
//初始化链接对象
session = [[AVCaptureSession alloc]init];
//高质量采集率
[session setSessionPreset:AVCaptureSessionPresetHigh];
if (input) {
[session addInput:input];
}
if (output) {
[session addOutput:output];
//设置扫码支持的编码格式(如下设置条形码和二维码兼容)
NSMutableArray *a = [[NSMutableArray alloc] init];
if ([output.availableMetadataObjectTypes containsObject:AVMetadataObjectTypeQRCode]) {
[a addObject:AVMetadataObjectTypeQRCode];
}
if ([output.availableMetadataObjectTypes containsObject:AVMetadataObjectTypeEAN13Code]) {
[a addObject:AVMetadataObjectTypeEAN13Code];
}
if ([output.availableMetadataObjectTypes containsObject:AVMetadataObjectTypeEAN8Code]) {
[a addObject:AVMetadataObjectTypeEAN8Code];
}
if ([output.availableMetadataObjectTypes containsObject:AVMetadataObjectTypeCode128Code]) {
[a addObject:AVMetadataObjectTypeCode128Code];
}
output.metadataObjectTypes=a;
}
AVCaptureVideoPreviewLayer * layer = [AVCaptureVideoPreviewLayer layerWithSession:session];
layer.videoGravity=AVLayerVideoGravityResizeAspectFill;
layer.frame=self.view.layer.bounds;
[self.view.layer insertSublayer:layer atIndex:0];
[self setOverlayPickerView];
[self addAnimation];
//开始捕获
[session startRunning];
}
#pragma 扫码结果 delegate
-(void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection{
DLog(@"%@",metadataObjects);
if (metadataObjects.count>0) {
[session stopRunning];
[self removeAnimation];
AVMetadataMachineReadableCodeObject * metadataObject = [metadataObjects objectAtIndex :0];
NSString *data = metadataObject.stringValue;
NSData *strData = [data dataUsingEncoding:NSUTF8StringEncoding];
NSError *error1 = NULL;
id result = [NSJSONSerialization JSONObjectWithData:strData options: NSJSONReadingMutableContainers|NSJSONReadingAllowFragments error:&error1];
}创建扫码界面
#define MarginW (ScreenWidth-235)/2
#define MarginH (ScreenHeight-235)/2
- (void)setOverlayPickerView
{
//左侧的view
UIImageView *leftView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, MarginW, ScreenHeight)];
leftView.alpha = 0.5;
leftView.backgroundColor = [UIColor blackColor];
[self.view addSubview:leftView];
//右侧的view
UIImageView *rightView = [[UIImageView alloc] initWithFrame:CGRectMake(235+MarginW, 0, MarginW, ScreenHeight)];
rightView.alpha = 0.5;
rightView.backgroundColor = [UIColor blackColor];
[self.view addSubview:rightView];
//最上部view
UIImageView* upView = [[UIImageView alloc] initWithFrame:CGRectMake(MarginW, 0, ScreenWidth-2*MarginW, MarginH)];
upView.alpha = 0.5;
upView.backgroundColor = [UIColor blackColor];
[self.view addSubview:upView];
//底部view
UIImageView * downView = [[UIImageView alloc] initWithFrame:CGRectMake(MarginW, MarginH+235, (ScreenWidth-2*MarginW), MarginH)];
downView.alpha = 0.5;
downView.backgroundColor = [UIColor blackColor];
[self.view addSubview:downView];
UIImageView *centerView = [[UIImageView alloc] initWithFrame:CGRectMake(MarginW, MarginH, 235, 235)];
centerView.image = [UIImage imageNamed:@"scankuang.png"];
centerView.contentMode = UIViewContentModeScaleAspectFill;
centerView.backgroundColor = [UIColor clearColor];
[self.view addSubview:centerView];
UIImageView *line = [[UIImageView alloc] initWithFrame:CGRectMake(MarginW, MarginH, 235, 2)];
line.tag = line_tag;
line.image = [UIImage imageNamed:@"scanline"];
line.contentMode = UIViewContentModeScaleAspectFill;
line.backgroundColor = [UIColor clearColor];
[self.view addSubview:line];
UILabel *msg = [[UILabel alloc] initWithFrame:CGRectMake(MarginW, MarginH-60, ScreenWidth-2*MarginW, 60)];
msg.backgroundColor = [UIColor clearColor];
msg.textColor = [UIColor whiteColor];
msg.textAlignment = NSTextAlignmentCenter;
msg.font = [UIFont systemFontOfSize:16];
msg.text = @"将二维码放入框内,即可自动扫描";
[self.view addSubview:msg];
}