之前我曾在Android上问过一个类似的问题，现在在iOS中使用相同的方法。我使用UIwebview构建了一个iOS应用程序。我如何允许网页视图访问相机，这是我的代码
#import "ViewController.h"
#define YourURL @"https://XXXXXXXXXXX"
@interface ViewController ()<UIWebViewDelegate>
@property (nonatomic,strong)UIWebView *webView;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
self.webView.scrollView.frame =self.webView.frame;
_webView.backgroundColor = [UIColor grayColor];
_webView = [[UIWebView alloc]initWithFrame:CGRectMake(0, 20, self.view.bounds.size.width, self.view.bounds.size.height-20)];
_webView.delegate = self;
if ([[[[NSUserDefaults standardUserDefaults]dictionaryRepresentation]allKeys]containsObject:@"cookie"]) {
NSArray *cookies =[[NSUserDefaults standardUserDefaults] objectForKey:@"cookie"];
NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];
[cookieProperties setObject:[cookies objectAtIndex:0] forKey:NSHTTPCookieName];
[cookieProperties setObject:[cookies objectAtIndex:1] forKey:NSHTTPCookieValue];
[cookieProperties setObject:[cookies objectAtIndex:3] forKey:NSHTTPCookieDomain];
[cookieProperties setObject:[cookies objectAtIndex:4] forKey:NSHTTPCookiePath];
NSHTTPCookie *cookieuser = [NSHTTPCookie cookieWithProperties:cookieProperties];
[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookieuser];
}
NSURLRequest *req = [NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@",YourURL]]];
_webView.scalesPageToFit = YES;
[ self.webView loadRequest:req];
[self.view addSubview:self.webView];
}
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:YES];
}
- (void)webViewDidStartLoad:(UIWebView *)webView{
}
- (void)webViewDidFinishLoad:(UIWebView *)webView{
NSArray *nCookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
NSHTTPCookie *cookie;
for (id c in nCookies)
{
if ([c isKindOfClass:[NSHTTPCookie class]])
{
cookie=(NSHTTPCookie *)c;
if ([cookie.name isEqualToString:@"PHPSESSID"]) {
NSNumber *sessionOnly = [NSNumber numberWithBool:cookie.sessionOnly];
NSNumber *isSecure = [NSNumber numberWithBool:cookie.isSecure];
NSArray *cookies = [NSArray arrayWithObjects:cookie.name, cookie.value, sessionOnly, cookie.domain, cookie.path, isSecure, nil];
[[NSUserDefaults standardUserDefaults] setObject:cookies forKey:@"cookie"];
break;
}
}
}
}
-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error{
NSLog(@"--------------%@",error);
}
@end
html编码
<!DOCTYPE html>
<html>
<head>
<title>///////</title>
<script type="text/javascript" src="../includes/instascan.min.js"></script>
</head>
<body>
<video id="preview" <?php /* style="position:fixed;right:0;bottom:0;min-width:100%;min-height:100%;" */ ?>></video>
<script type="text/javascript">
let opts = {
// Whether to scan continuously for QR codes. If false, use scanner.scan() to manually scan.
// If true, the scanner emits the "scan" event when a QR code is scanned. Default true.
continuous: true,
// The HTML element to use for the camera's video preview. Must be a <video> element.
// When the camera is active, this element will have the "active" CSS class, otherwise,
// it will have the "inactive" class. By default, an invisible element will be created to
// host the video.
video: document.getElementById('preview'),
// Whether to horizontally mirror the video preview. This is helpful when trying to
// scan a QR code with a user-facing camera. Default true.
mirror: false,
// Whether to include the scanned image data as part of the scan result. See the "scan" event
// for image format details. Default false.
captureImage: false,
// Only applies to continuous mode. Whether to actively scan when the tab is not active.
// When false, this reduces CPU usage when the tab is not active. Default true.
backgroundScan: true,
// Only applies to continuous mode. The period, in milliseconds, before the same QR code
// will be recognized in succession. Default 5000 (5 seconds).
refractoryPeriod: 5000,
// Only applies to continuous mode. The period, in rendered frames, between scans. A lower scan period
// increases CPU usage but makes scan response faster. Default 1 (i.e. analyze every frame).
scanPeriod: 1
};
let scanner = new Instascan.Scanner(opts);
scanner.addListener('scan', function (content) {
window.location = "result.php?result="+content;
});
Instascan.Camera.getCameras().then(function (cameras) {
if (cameras.length > 0) {
if(cameras.length > 1){
scanner.start(cameras[1]);
}
else{
scanner.start(cameras[0]);
}
} else {
console.error('No cameras found.');
}
}).catch(function (e) {
console.error(e);
});
</script>
</body>
</html>
提前谢谢