iOS开发在js中调用oc可以实现在HTML5中调用手机系统的相册，拍照等。

来源：互联网发布：女诫知乎编辑：程序博客网时间：2024/06/16 18:28

控制器.m的实现如下

#import "ViewController.h"@interface ViewController () <UIWebViewDelegate>@end@implementation ViewController- (void)viewDidLoad{    [super viewDidLoad];    // 1.webView    UIWebView *webView = [[UIWebView alloc] init];    webView.frame = self.view.bounds;    webView.delegate = self;    [self.view addSubview:webView];        // 2.加载网页    NSURL *url = [[NSBundle mainBundle] URLForResource:@"test" withExtension:@"html"];    NSURLRequest *request = [NSURLRequest requestWithURL:url];    [webView loadRequest:request];}#pragma mark - UIWebViewDelegate/** *  webView每当发送一个请求之前，都会先调用这个方法（能拦截所有请求）,利用这个特性，和服务器协商一个自定义的协议头，如“test://”        js中的响应的方法代码如下    function fn_call() {    window.location.href = 'test://call'; } */- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{    NSString *url = request.URL.absoluteString;    NSRange range = [url rangeOfString:@"test://"];    NSUInteger loc = range.location;    if (loc != NSNotFound) { // url的协议头是test        // 方法名        NSString *method = [url substringFromIndex:loc + range.length];                // 转成SEL        SEL sel = NSSelectorFromString(method);        [self performSelector:sel withObject:nil];    }    return YES;}/** *  打电话 */- (void)call{    NSLog(@"call----");}/** *  打开照相机 */- (void)openCamera{    NSLog(@"openCamera----");}@end

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