<script type="text/javaScript">
function postStr(){
return document.getElementById("text1").value;
//return "javaScript返回值啦";
}
</script>
2、將此html文件放到項目代碼目錄裏面，如圖：
3、拖壹個UIWebView控件和UIButton控件到xxxViewController對應的.xib或.storyboard視圖的UIView上；
在xxxViewController的.h文件中分別聲明UIWebView類型變量和UIButton類型的變量，以及壹個按鈕點擊事件(並且跟視圖裏面的控件連線)，
並且添加壹個UIWebViewDelegate類型的委托。<喎?"/kf/ware/vc/" target="_blank" class="keylink">vcD4KPHA+eHh4Vmlld0NvbnRyb2xsZXIuaM7EvP7E2sjdyOfPwqO6PC9wPgo8cD48L3A+CjxwIGNsYXNzPQ=="p1">
#import
@interface ViewController : UIViewController
@property(nonatomic,retain) IBOutlet UIWebView *webview;
@property(nonatomic,retain) IBOutlet UIButton *button;
-(IBAction)IOS_JS:(id)sender;
@end
4、在xxxViewController.m文件中實現通過點擊事件，調用javaScript的方法並取得返回值。
代碼如下：
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize webview;
- (void)viewDidLoad
{
[super viewDidLoad];
//設置webView
webview.backgroundColor = [UIColor clearColor];
//webview.scalesPageToFit =YES;
webview.delegate =self;
//找到jsIOS.html文件的路徑
NSString *basePath = [[NSBundle mainBundle]bundlePath];
NSString *helpHtmlPath = [basePath stringByAppendingPathComponent:@"jsIOS.html"];
NSURL *url = [NSURL fileURLWithPath:helpHtmlPath];
//加載本地html文件
[webview loadRequest:[NSURLRequest requestWithURL:url]];
}
/*
* 點擊事件
* 調用javaScript的方法postStr()並取得返回值
* 輸出返回值到控制臺
*/
-(IBAction)IOS_JS:(id)sender
{
NSString *str = [self.webview stringByEvaluatingJavaScriptFromString:@"postStr();"];
NSLog(@"JS返回值：%@",str);
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
@end