js调oc 并返回值给js
js调oc 并返回值给js.gif
1.js 点击‘获取定位’
function locationClick() {
window.webkit.messageHandlers.Location.postMessage(null);
}
2 .ios 内注册 js “Location” 命令
-- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.webView.configuration.userContentController addScriptMessageHandler:self name:@"Location"];
}
3. ios 得到 js 发送的“Location” 命令
#pragma mark - WKScriptMessageHandler
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message
{
// message.body -- Allowed types are NSNumber, NSString, NSDate, NSArray,NSDictionary, and NSNull.
NSLog(@"body:%@",message.body);
if ([message.name isEqualToString:@"Location"]) {
[self getLocation];//ios 通过调用 js方法的方式 ，要把数据传给js，
}
}
4. js 接收ios 结果回调
function setLocation(location) {
asyncAlert(location);
document.getElementById("returnValue").value = location;
}
5. ios 将结果传给 js
- (void)getLocation
{
// 获取位置信息
// 将结果返回给js
NSString *jsStr = [NSString stringWithFormat:@"setLocation('%@')",@"广东省深圳市南山区学府路XXXX号"];
[self.webView evaluateJavaScript:jsStr completionHandler:^(id _Nullable result, NSError * _Nullable error) {
NSLog(@"%@----%@",result, error);
}];
}
js ------- index.html
这是按钮调用
这是文件上传
这是回调结果展示区
竖直方向的表头：
姓名
Bill Gates
电话
555 77 854
传真
555 77 855
ios --- WKWebViewController
//
// WKWebViewController.m
// JS_OC_URL
//
// Created by Harvey on 16/8/4.
// Copyright © 2016年 Haley. All rights reserved.
//
#import
#import
#import "WKWebViewController.h"
#import "HLAudioPlayer.h"
@interface WKWebViewController ()
@property (strong, nonatomic) WKWebView *webView;
@property (strong, nonatomic) UIProgressView *progressView;
@end
@implementation WKWebViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.title = @"MessageHandler";
UIBarButtonItem *rightItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(rightClick)];
self.navigationItem.rightBarButtonItem = rightItem;
[self initWKWebView];
[self initProgressView];
[self.webView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionNew context:nil];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
// addScriptMessageHandler 很容易导致循环引用
// 控制器 强引用了WKWebView,WKWebView copy(强引用了）configuration， configuration copy （强引用了）userContentController
// userContentController 强引用了 self （控制器）
[self.webView.configuration.userContentController addScriptMessageHandler:self name:@"ScanAction"];
[self.webView.configuration.userContentController addScriptMessageHandler:self name:@"Location"];
[self.webView.configuration.userContentController addScriptMessageHandler:self name:@"Share"];
[self.webView.configuration.userContentController addScriptMessageHandler:self name:@"Color"];
[self.webView.configuration.userContentController addScriptMessageHandler:self name:@"Pay"];
[self.webView.configuration.userContentController addScriptMessageHandler:self name:@"Shake"];
[self.webView.configuration.userContentController addScriptMessageHandler:self name:@"GoBack"];
[self.webView.configuration.userContentController addScriptMessageHandler:self name:@"PlaySound"];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
// 因此这里要记得移除handlers
[self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"ScanAction"];
[self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"Location"];
[self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"Share"];
[self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"Color"];
[self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"Pay"];
[self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"Shake"];
[self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"GoBack"];
[self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"PlaySound"];
}
- (void)initWKWebView
{
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
WKPreferences *preferences = [WKPreferences new];
preferences.javaScriptCanOpenWindowsAutomatically = YES;
preferences.minimumFontSize = 40.0;
configuration.preferences = preferences;
self.webView = [[WKWebView alloc] initWithFrame:self.view.frame configuration:configuration];
// NSString *urlStr = @"http://www.baidu.com";
// NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlStr]];
// [self.webView loadRequest:request];
NSString *urlStr = [[NSBundle mainBundle] pathForResource:@"index.html" ofType:nil];
NSURL *fileURL = [NSURL fileURLWithPath:urlStr];
[self.webView loadFileURL:fileURL allowingReadAccessToURL:fileURL];
self.webView.UIDelegate = self;
[self.view addSubview:self.webView];
}
- (void)initProgressView
{
CGFloat kScreenWidth = [[UIScreen mainScreen] bounds].size.width;
UIProgressView *progressView = [[UIProgressView alloc] initWithFrame:CGRectMake(0, 0, kScreenWidth, 2)];
progressView.tintColor = [UIColor redColor];
progressView.trackTintColor = [UIColor lightGrayColor];
[self.view addSubview:progressView];
self.progressView = progressView;
}
- (void)rightClick
{
[self goBack];
}
- (void)dealloc
{
NSLog(@"%s",__FUNCTION__);
[self.webView removeObserver:self forKeyPath:@"estimatedProgress"];
}
#pragma mark - private method
- (void)getLocation
{
// 获取位置信息
// 将结果返回给js
NSString *jsStr = [NSString stringWithFormat:@"setLocation('%@')",@"广东省深圳市南山区学府路XXXX号"];
[self.webView evaluateJavaScript:jsStr completionHandler:^(id _Nullable result, NSError * _Nullable error) {
NSLog(@"%@----%@",result, error);
}];
}
- (void)shareWithParams:(NSDictionary *)tempDic
{
if (![tempDic isKindOfClass:[NSDictionary class]]) {
return;
}
NSString *title = [tempDic objectForKey:@"title"];
NSString *content = [tempDic objectForKey:@"content"];
NSString *url = [tempDic objectForKey:@"url"];
// 在这里执行分享的操作
// 将分享结果返回给js
NSString *jsStr = [NSString stringWithFormat:@"shareResult('%@','%@','%@')",title,content,url];
[self.webView evaluateJavaScript:jsStr completionHandler:^(id _Nullable result, NSError * _Nullable error) {
NSLog(@"%@----%@",result, error);
}];
}
- (void)changeBGColor:(NSArray *)params
{
if (![params isKindOfClass:[NSArray class]]) {
return;
}
if (params.count < 4) {
return;
}
CGFloat r = [params[0] floatValue];
CGFloat g = [params[1] floatValue];
CGFloat b = [params[2] floatValue];
CGFloat a = [params[3] floatValue];
self.view.backgroundColor = [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:a];
}
- (void)payWithParams:(NSDictionary *)tempDic
{
if (![tempDic isKindOfClass:[NSDictionary class]]) {
return;
}
NSString *orderNo = [tempDic objectForKey:@"order_no"];
long long amount = [[tempDic objectForKey:@"amount"] longLongValue];
NSString *subject = [tempDic objectForKey:@"subject"];
NSString *channel = [tempDic objectForKey:@"channel"];
NSLog(@"%@---%lld---%@---%@",orderNo,amount,subject,channel);
// 支付操作
// 将支付结果返回给js
NSString *jsStr = [NSString stringWithFormat:@"payResult('%@')",@"支付成功"];
[self.webView evaluateJavaScript:jsStr completionHandler:^(id _Nullable result, NSError * _Nullable error) {
NSLog(@"%@----%@",result, error);
}];
}
- (void)shakeAction
{
AudioServicesPlaySystemSound (kSystemSoundID_Vibrate);
[HLAudioPlayer playMusic:@"shake_sound_male.wav"];
}
- (void)goBack
{
[self.webView goBack];
}
- (void)playSound:(NSString *)fileName
{
if (![fileName isKindOfClass:[NSString class]]) {
return;
}
[HLAudioPlayer playMusic:fileName];
}
#pragma mark - KVO
// 计算wkWebView进度条
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if (object == self.webView && [keyPath isEqualToString:@"estimatedProgress"]) {
CGFloat newprogress = [[change objectForKey:NSKeyValueChangeNewKey] doubleValue];
if (newprogress == 1) {
[self.progressView setProgress:1.0 animated:YES];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.7 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
self.progressView.hidden = YES;
[self.progressView setProgress:0 animated:NO];
});
}else {
self.progressView.hidden = NO;
[self.progressView setProgress:newprogress animated:YES];
}
}
}
#pragma mark - WKUIDelegate
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler
{
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提醒" message:message preferredStyle:UIAlertControllerStyleAlert];
[alert addAction:[UIAlertAction actionWithTitle:@"知道了" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
completionHandler();
}]];
[self presentViewController:alert animated:YES completion:nil];
}
#pragma mark - WKScriptMessageHandler
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message
{
// message.body -- Allowed types are NSNumber, NSString, NSDate, NSArray,NSDictionary, and NSNull.
NSLog(@"body:%@",message.body);
if ([message.name isEqualToString:@"Location"]) {
[self getLocation];
}
}
@end
注：ios 注入js 方法 ↓
NSString *postParamJs = [NSString stringWithFormat:@" function getWKWebViewPostParamsInIOS(){return %@ } ",jsonParamStr];
WKUserScript *script = [[WKUserScript alloc] initWithSource:postParamJs injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:true];
[self.wkWebView.configuration.userContentController addUserScript:script];
demo 地址 https://github.com/lizhi0123/JS_OC_MessageHandler
原贴地址：https://www.jianshu.com/p/433e59c5a9eb
原贴demo地址 https://github.com/Haley-Wong/JS_OC/tree/master/JS_OC_MessageHandler