js调用oc方法
第一种
html代码
<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta content="width=device-width,initial-scale=1,user-scalable=no" name="viewport">
<body style="background-color: white;">
<script type="text/javascript">
function buttonClick1() {
//window.webkit.messageHandlers.<方法名>.postMessage(<数据>)
window.webkit.messageHandlers.jsCallNative1.postMessage(null);
}
function buttonClick2() {
window.webkit.messageHandlers.jsCallNative2.postMessage(['参数1', '参数2']);
}
function buttonClick3() {
window.webkit.messageHandlers.jsCallNative3.postMessage(['参数1', '参数2'])
var result = window.prompt("buttonClick3");
document.getElementById('result').innerText = "result: " + result;
}
</script>
<button type="button1" onclick="buttonClick1()" style="width:100%; height:50px;" />调用OC代码 无参数 无返回值</button>
<div style="width:100%; height:30px;"></div>
<button type="button2" onclick="buttonClick2()" style="width:100%; height:50px;" />调用OC代码 有参数
无返回值</button>
<div style="width:100%; height:30px;"></div>
<button type="button3" onclick="buttonClick3()" style="width:100%; height:50px;" />调用OC代码 有参数 有返回值</button>
<br />
<p id="result">返回值：</p>
</body>
</html>
ios代码
#import "ViewController.h"
#import <WebKit/WebKit.h>
@interface ViewController ()<WKScriptMessageHandler, WKUIDelegate, WKNavigationDelegate>
@property(nonatomic, weak) WKWebView *webView;
@end
@implementation ViewController
- (void)dealloc{
[self.webView.configuration.userContentController removeAllUserScripts];
}
- (void)viewDidLoad {
[super viewDidLoad];
// WKWebView的配置
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
//是否支持JavaScript
configuration.preferences.javaScriptEnabled = true;
//不通过用户交互，是否可以打开窗口
configuration.preferences.javaScriptCanOpenWindowsAutomatically = NO;
WKUserContentController *userContentController = [[WKUserContentController alloc] init];
[userContentController addScriptMessageHandler:self name:@"jsCallNative1"];
[userContentController addScriptMessageHandler:self name:@"jsCallNative2"];
[userContentController addScriptMessageHandler:self name:@"jsCallNative3"];
configuration.userContentController = userContentController;
WKWebView *webView = [[WKWebView alloc]initWithFrame: self.view.bounds configuration: configuration];
[self.view addSubview:webView];
self.webView = webView;
webView.UIDelegate = self;
webView.navigationDelegate = self;
NSString *path = [[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"];
NSURL* url = [NSURL fileURLWithPath:path];
NSURLRequest* request = [NSURLRequest requestWithURL:url];
[webView loadRequest:request];
}
#pragma mark - WKScriptMessageHandler
- (void)userContentController:(nonnull WKUserContentController *)userContentController didReceiveScriptMessage:(nonnull WKScriptMessage *)message {
if ([message.name isEqualToString:@"jsCallNative1"]) {
NSLog(@"调用成功");
}
if ([message.name isEqualToString:@"jsCallNative2"]) {
NSArray *parameters = message.body;
NSLog(@"参数 %@",parameters);
}
if ([message.name isEqualToString:@"jsCallNative3"]) {
NSArray *parameters = message.body;
NSLog(@"参数 %@",parameters);
}
}
#pragma mark - WKUIDelegate delegate method
- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * _Nullable result))completionHandler {
if ([prompt isEqualToString: @"buttonClick3"]) {
completionHandler(@"将内容回调给js");
}
}
@end
oc调用js方法
html代码
<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta content="width=device-width,initial-scale=1,user-scalable=no" name="viewport">
<body style="background-color: white;">
<script type="text/javascript">
function ocCallJs(result) {
document.getElementById('result').innerText = "result: " + result;
}
</script>
<br />
<p id="result">返回值：</p>
</body>
</html>
oc代码
#import "ViewController.h"
#import <WebKit/WebKit.h>
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// WKWebView的配置
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
//是否支持JavaScript
configuration.preferences.javaScriptEnabled = true;
//不通过用户交互，是否可以打开窗口
configuration.preferences.javaScriptCanOpenWindowsAutomatically = NO;
WKWebView *webView = [[WKWebView alloc]initWithFrame: self.view.bounds configuration: configuration];
[self.view addSubview:webView];
webView.navigationDelegate = self;
NSString *path = [[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"];
NSURL* url = [NSURL fileURLWithPath:path];
NSURLRequest* request = [NSURLRequest requestWithURL:url];
[webView loadRequest:request];
}
#pragma mark - WKNavigationDelegate
- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation {
[webView evaluateJavaScript:@"ocCallJs('Hello World')" completionHandler:^(id response, NSError * _Nullable error) {
NSLog(@"response = %@", response);
}];
}
@end
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