QRCode--根据系统API, 封装二维码扫描

QRCode

/*!
*  扫一扫
*/
- (void)intoQRCodeVC {
NSString *mediaType = AVMediaTypeVideo;
AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];
if(authStatus == AVAuthorizationStatusDenied){
if (IS_VAILABLE_IOS8) {
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"相机权限受限" message:@"请在iPhone的\"设置->隐私->相机\"选项中,允许\"自游邦\"访问您的相机." preferredStyle:UIAlertControllerStyleAlert];
[alert addAction:[UIAlertAction actionWithTitle:@"好" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
}]];
[alert addAction:[UIAlertAction actionWithTitle:@"去设置" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
if ([self canOpenSystemSettingView]) {
[self systemSettingView];
}
}]];
[self presentViewController:alert animated:YES completion:nil];
} else {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"相机权限受限" message:@"请在iPhone的\"设置->隐私->相机\"选项中,允许\"自游邦\"访问您的相机." delegate:nil cancelButtonTitle:@"好的" otherButtonTitles:nil];
[alert show];
}

return;
}

QRCodeController *qrcodeVC = [[QRCodeController alloc] init];
qrcodeVC.view.alpha = 0;
[qrcodeVC setDidReceiveBlock:^(NSString *result) {
NSLog(@"%@", result);
}];
AppDelegate *del = (AppDelegate *)[UIApplication sharedApplication].delegate;
[del.window.rootViewController addChildViewController:qrcodeVC];
[del.window.rootViewController.view addSubview:qrcodeVC.view];
[UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
qrcodeVC.view.alpha = 1;
} completion:^(BOOL finished) {
}];
}

/**
*  是否可以打开设置页面
*
*  @return
*/
- (BOOL)canOpenSystemSettingView {
if (IS_VAILABLE_IOS8) {
NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
if ([[UIApplication sharedApplication] canOpenURL:url]) {
return YES;
} else {
return NO;
}
} else {
return NO;
}
}

/**
*  跳到系统设置页面
*/
- (void)systemSettingView {
if (IS_VAILABLE_IOS8) {
NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
if ([[UIApplication sharedApplication] canOpenURL:url]) {
[[UIApplication sharedApplication] openURL:url];
}
}
}