IOS OC调用JS传递参数并获得返回值

01.//

02.//  ViewController.m

03.//  IOS_JS_01

04.//

05.//  Created by IMAC on 14-2-25.

06.//  Copyright (c) 2014年 Wanggsx. All rights reserved.

07.//

08. 

09.#import "ViewController.h"

10. 

11.@interface ViewController ()

12. 

13.@end

14. 

15.@implementation ViewController

16.@synthesize webview;

17. 

18.- (void)viewDidLoad

19.{

20.    [super viewDidLoad];

21.    //设置webView

22.    webview.backgroundColor = [UIColor clearColor];

23.    //webview.scalesPageToFit =YES;

24.    webview.delegate =self;

25.    //找到jsIOS.html文件的路径

26.    NSString *basePath = [[NSBundle mainBundle]bundlePath];

27.    NSString *helpHtmlPath = [basePath stringByAppendingPathComponent:@"jsIOS.html"];

28.    NSURL *url = [NSURL fileURLWithPath:helpHtmlPath];

29.    //加载本地html文件

30.    [webview loadRequest:[NSURLRequest requestWithURL:url]];

31.}

32. 

33./*

34. * 点击事件

35. * 调用javaScript的方法postStr(str1,str2)并取得返回值

36. * 输出返回值到控制台

37. */

38.-(IBAction)IOS_JS:(id)sender

39.{

40.    //NSString *str = [self.webview stringByEvaluatingJavaScriptFromString:@"postStr();"];

41.    //要传递的参数一

42.    NSString *str1 = @"我来自于oc";

43.    //要传递的参数二

44.    NSString *str2 = @"我来自于地球";

45.    NSString *str = [self.webview stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"postStr('%@','%@');",str1,str2]];

46.    NSLog(@"JS返回值：%@",str);

47.}

48. 

49. 

50.- (void)didReceiveMemoryWarning

51.{

52.    [super didReceiveMemoryWarning];

53.}

54.@end