{"id":141,"date":"2016-03-17T17:06:31","date_gmt":"2016-03-17T09:06:31","guid":{"rendered":"http:\/\/www.yusian.com\/blog\/?p=141"},"modified":"2016-08-16T11:25:04","modified_gmt":"2016-08-16T03:25:04","slug":"object-c%e4%b8%8ejavascript%e4%ba%a4%e4%ba%92%e7%9a%84%e4%b8%a4%e7%a7%8d%e6%96%b9%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.yusian.com\/blog\/project\/2016\/03\/17\/170631141.html","title":{"rendered":"Objective-C\u4e0eJavaScript\u4ea4\u4e92\u7684\u4e24\u79cd\u65b9\u5f0f"},"content":{"rendered":"<p><strong>1\u3001\u5728iOS\u9879\u76ee\u5f00\u53d1\u4e2d<\/strong>\uff0c\u539f\u751f\u9875\u9762\u4e2d\u63ba\u6742Html5\u9875\u9762\u5df2\u4e0d\u662f\u4ec0\u4e48\u65b0\u9c9c\u4e8b\u4e86\uff0c\u6bd5\u7adfH5\u4e5f\u4ed6\u76f8\u5173\u7684\u4f18\u52bf\uff0c\u6bd4\u5982\u5e03\u5c40\u3001\u5bcc\u6587\u672c\u5185\u5bb9\u5c55\u793a\u7b49\uff1b<\/p>\n<p><strong>2\u3001\u968f\u7740H5\u9875\u9762\u7684\u4fb5\u5165<\/strong>\uff0cOC\u4e0eJS\u7684\u4ea4\u4e92\u610f\u613f\u8d8a\u6765\u8d8a\u5f3a\u70c8\uff0c\u5c31\u76ee\u524d\u6765\u770b\uff0c\u5728\u4e0d\u5f15\u7528\u7b2c\u4e09\u65b9\u5e93\u7684\u524d\u63d0\u4e0b\uff0c\u6709\u4e24\u79cd\u65b9\u5f0f\u53ef\u4ee5\u89e3\u51b3\uff1b<br \/>\n2.1\u3001iOS6\u53ca\u4ee5\u524d\u901a\u8fc7\u62e6\u622aNSRequest\u8bf7\u6c42\u6765\u8c03\u7528\u539f\u751f\u65b9\u6cd5\u8fdb\u884c\u4ea4\u4e92\uff1b<br \/>\n2.2\u3001iOS7\u53ca\u4ee5\u540e\u7684\u7248\u672c\u82f9\u679c\u5b98\u65b9\u5f15\u5165\u4e86JavaScriptCore\u6846\u67b6\uff1b<\/p>\n<p><strong>3\u3001\u62e6\u622aNSRequest\u8bf7\u6c42<\/strong><br \/>\nA\u3001UIwebView\u6709\u4e2a\u4ee3\u7406\u65b9\u6cd5\uff1a<\/p>\n<pre lang=\"objc\" line=\"1\">- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType;<\/pre>\n<p>B\u3001\u6b64\u65b9\u6cd5\u901a\u8fc7\u8fd4\u56deYES\/NO\u6765\u51b3\u5b9a\u662f\u5426\u8df3\u8f6c\u5230request\u7684\u9875\u9762\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u534f\u8bae\u5934\u6765\u533a\u5206\u662f\u6b63\u5e38\u7684URL\u8bf7\u6c42\u8fd8\u662f\u672c\u5730\u65b9\u6cd5\u7684\u8c03\u7528\u8bf7\u6c42\uff1b<!--more--><br \/>\nC\u3001\u6bd4\u5982\u8bf4\u7f51\u9875\u4e2d\u67d0a\u6807\u7b7e\u8bf7\u6c42\u7684\u5730\u5740\u662f saap:\/\/share\uff0c\u90a3\u4e48\u5728\u8be5\u4ee3\u7406\u65b9\u6cd5\u4e2d\u5c31\u53ef\u4ee5\u901a\u8fc7url\u7684\u534f\u8bae\u5934\u6765\u5c06\u5176\u62e6\u622a\uff0c\u8fd4\u56deNO\uff0c\u9875\u9762\u4e0d\u8df3\u8f6c\uff0c\u540c\u65f6\u6267\u884c\u67d0\u4e2ashare\u65b9\u6cd5\uff0c\u5373\u8fbe\u5230\u4e86\u8c03\u7528OC\u672c\u5730\u65b9\u6cd5\u7684\u6548\u679c\uff1b<br \/>\nD\u3001\u53c2\u6570\u53ef\u4ee5\u901a\u8fc7url\u4e2d\u5e26\u8fc7\u6765\uff0c\u6216\u8005\u53c2\u6570\u5185\u5bb9\u8fc7\u957f\u53ef\u4ee5\u901a\u8fc7post\u8bf7\u6c42\uff0c\u5728request\u7684HTTPBody\u4e2d\u53ef\u4ee5\u5c06post\u8bf7\u6c42\u5185\u5bb9\u89e3\u6790\u51fa\u6765<br \/>\nE\u3001\u73b0\u5728\u8c03OC\u65b9\u6cd5\u6ca1\u95ee\u9898\u4e86\uff0cOC\u5982\u4f55\u8c03\u7528\u9875\u9762\u4e2d\u7684\u65b9\u6cd5\u5462\uff1f\u5176\u5b9eUIWebView\u7ed9\u6211\u4eec\u4e5f\u63d0\u4f9b\u4e86\u4e00\u4e2a\u4ea4\u4e92\u65b9\u6cd5<\/p>\n<pre lang=\"objc\" line=\"1\">- (NSString *)stringByEvaluatingJavaScriptFromString:(NSString *)script;<\/pre>\n<p>\u76f4\u63a5\u4f20\u5165JS\u811a\u672c\uff0c\u8fd8\u53ef\u4ee5\u63a5\u6536\u811a\u672c\u7684\u8fd4\u56de\u503c<\/p>\n<p><strong>4\u3001JavaScriptCore\u6846\u67b6<\/strong><br \/>\n4.1\u3001\u5728iOS7\u53ca\u4ee5\u540e\u7684\u7248\u672c\u4e2d\u53ef\u4ee5\u901a\u8fc7\u5b98\u65b9\u63d0\u4f9b\u7684JS\u6846\u67b6\u6765\u8fdb\u884c\u4ea4\u4e92\uff0c\u4e3b\u8981\u6d89\u53ca\u5230\u7684\u4e24\u4e2a\u7c7b\u662fJSValue\u3001JSContext<br \/>\n4.2\u3001JSContext\u6307\u7684\u662fJS\u7684\u4e0a\u4e0b\u6587\uff0c\u5373\u53ef\u4ee5\u7b80\u5355\u89e3\u7406\u6210<script><\/script>\u6807\u7b7e\u90e8\u5206\uff1b<br \/>\n4.3\u3001JSValue\u662f\u4e00\u4e2a\u5728OC\u548cJS\u4e4b\u95f4\u8fdb\u884c\u6570\u636e\u8f6c\u6362\u7684\u7c7b\uff0c\u4ed6\u53ef\u4ee5\u5c06JS\u5bf9\u8c61\u6216\u6570\u636e\u8f6c\u6362\u6210OC\u7684\u5bf9\u8c61\u6216\u6570\u636e\uff0c\u53cd\u4e4b\u4ea6\u7136\uff1b<br \/>\n4.4\u3001\u5982\u4f55\u4f7f\u7528\u5462\uff0c\u53c8\u5206\u4e3a\u4e24\u79cd\u65b9\u5f0f\uff0c\u4e00\u79cd\u65b9\u5f0f\u901a\u8fc7Block(\u5373\u6240\u8c13\u7684\u533f\u540d\u51fd\u6570)\uff0c\u53e6\u4e00\u79cd\u65b9\u6cd5\u5373\u901a\u8fc7\u4ee3\u7406\uff0c\u8fd9\u662f\u82f9\u679c\u7684\u4e00\u60ef\u4f5c\u98ce\uff01<\/p>\n<p><strong>5\u3001\u4e24\u79cd\u65b9\u6cd5\u7684\u5bf9\u6bd4<\/strong><br \/>\n5.1\u3001Block\u7684\u57fa\u672c\u5b9e\u73b0\u65b9\u5f0f\uff1a<br \/>\nA\u3001\u5728UIWebView\u7684\u4ee3\u7406\u65b9\u6cd5- (void)webViewDidFinishLoad:(UIWebView *)webView\u52a0\u5165\u4ee5\u4e0b\u4ee3\u7801<\/p>\n<pre lang=\"objc\" line=\"1\">- (void)webViewDidFinishLoad:(UIWebView *)webView\n{\n????JSContext *context = [self.webView valueForKeyPath:@\"documentView.webView.mainFrame.javaScriptContext\"];\n????context[@\"ocShow\"] = ^(){\n????????NSLog(@\"\u6765\u81eaJS\u7684\u95ee\u5019...\");\n????};\n????\/\/ \u6a21\u62dfJS\u8c03\u7528\n????[context evaluateScript:@\"ocShow()\"];\n}<\/pre>\n<p>\u7f51\u9875\u4e2d\u5982\u679cJS\u8c03\u7528ocShow()\u65b9\u6cd5\uff0c\u5373\u4f1a\u8f93\u5165\u8fd9\u884c&#8221;\u6765\u81eaJS\u7684\u95ee\u5019&#8230;&#8221;\uff1b<\/p>\n<pre lang=\"objc\" line=\"1\">2016-03-17 17:04:34.937 SAJavaScript[8339:233216] \u6765\u81eaJS\u7684\u95ee\u5019...<\/pre>\n<p>B\u3001\u9700\u8981\u4f20\u53c2\u6570\u600e\u4e48\u529e\uff1f\u4e24\u79cd\u65b9\u6cd5<br \/>\nC\u3001\u4e00\u79cd\u65b9\u6cd5\u662f\u5728\u8fd9\u4e2aBlock\u4e2d\u6dfb\u52a0\u53c2\u6570\uff1a^(NSString *str1, NSString *str2){}\uff0c\u5982\u679c\u5bf9Block\u4e0d\u719f\u6089\u53ef\u4ee5\u53c2\u8003http:\/\/www.yusian.com\/thread-976-1-1.html \u6216\u8005\u7f51\u4e0a\u627e\u4e0b\u76f8\u5173\u8d44\u6599\u770b\u770b\u5148\uff1b<br \/>\nD\u3001\u53e6\u5916\u4e00\u79cd\u65b9\u6cd5\uff0c\u901a\u8fc7JSContext\u7684\u7c7b\u65b9\u6cd5currentArguments\u53ef\u4ee5\u83b7\u53d6NSArray *argument = [JSContext currentArguments]; \u7136\u540e\u904d\u5386\u83b7\u5f97\uff1b<br \/>\nE\u3001\u8fd9\u79cd\u65b9\u6cd5\u4f7f\u7528\u7b80\u5355\u65b9\u4fbf\uff0c\u4f46\u6bcf\u6b21\u90fd\u8981\u91cd\u65b0\u5199\uff0c\u53ef\u4e0d\u53ef\u4ee5\u6307\u5411\u6211\u5df2\u6709\u7684\u73b0\u6210\u65b9\u6cd5\uff1f\u5f53\u7136\u662f\u53ef\u4ee5\u7684\uff01\u4f7f\u7528\u4ee3\u7406<br \/>\n5.2\u3001\u901a\u8fc7\u4ee3\u7406\u5b9e\u73b0<br \/>\nA\u3001\u81ea\u5b9a\u4e49\u4e00\u4e2a\u534f\u8bae\uff0c\u7ee7\u627f\u81ea<JSExport>\uff0c\u628aJS\u9700\u8981\u8c03\u7528\u7684\u65b9\u6cd5\u5728\u8be5\u534f\u8bae\u4e2d\u7533\u660e\uff1b<br \/>\nB\u3001\u4f46\u51e1\u9075\u5faa<JSExport>\u534f\u8bae\u7684\u5bf9\u8c61\u90fd\u53ef\u4ee5\u88abJS\u6240\u8c03\u7528<br \/>\nC\u3001\u5b9e\u73b0\u76f8\u5173\u65b9\u6cd5\u5373\u53ef<\/p>\n<pre lang=\"objc\" line=\"1\">\/\/\n\/\/? ViewController.m\n\/\/? SAJavaScript\n\/\/\n\/\/? Created by \u4f59\u897f\u5b89 on 16\/3\/17.\n\/\/? Copyright ? 2016\u5e74 Sian. All rights reserved.\n\/\/\n?\n#import \"ViewController.h\"\n#import <JavaScriptCore\/JavaScriptCore.h>\n?\n@protocol SAJSExport <JSExport>\n- (void)showMessage:(JSValue *)message;\n@end\n?\n@interface ViewController () <UIWebViewDelegate, SAJSExport>\n@property (nonatomic, strong) UIWebView *webView;\n@end\n?\n@implementation ViewController\n?\n- (void)viewDidLoad\n{\n????[super viewDidLoad];\n????self.webView = [[UIWebView alloc] init];\n????self.webView.delegate = self;\n????self.webView.frame = self.view.bounds;\n????[self.view addSubview:self.webView];\n????NSURL *url = [NSURL URLWithString:@\"http:\/\/www.yusian.com\/blog\"];\n????[self.webView loadRequest:[NSURLRequest requestWithURL:url]];\n}\n?\n- (void)webViewDidFinishLoad:(UIWebView *)webView\n{\n????JSContext *context = [self.webView valueForKeyPath:@\"documentView.webView.mainFrame.javaScriptContext\"];\n????\/\/ 1\u3001Block\u65b9\u6cd5\n????context[@\"ocShow\"] = ^(){\n????????NSLog(@\"\u6765\u81eaJS\u7684\u95ee\u5019...\");\n????};\n????\/\/ \u6a21\u62dfJS\u8c03\u7528\n????[context evaluateScript:@\"ocShow()\"];\n?????\n????\/\/ 2\u3001\u4ee3\u7406\u65b9\u6cd5\n????[context setObject:self forKeyedSubscript:@\"webView\"];\n????\/\/ \u6a21\u62dfJS\u8c03\u7528webView.showMessage()\u65b9\u6cd5\n????[context evaluateScript:@\"webView.showMessage('Hello JavaScript')\"];\n}\n?\n- (void)showMessage:(JSValue *)message\n{\n????[[[UIAlertView alloc] initWithTitle:nil message:[message toString] delegate:nil cancelButtonTitle:@\"\u6715\u77e5\u9053\u4e86\" otherButtonTitles:nil, nil] show];\n}\n@end<\/pre>\n<p>D\u3001\u6548\u679c\u56fe<\/p>\n<p>E\u3001\u56de\u8c03JS\u5c31\u66f4\u7b80\u5355\u4e86\uff0c\u5176\u5b9e\u4e0a\u9762\u5df2\u7ecf\u8c03\u7528\u8fc7\u4e86\uff0cJSContext\u4e2d\u7684\u65b9\u6cd5<\/p>\n<pre lang=\"objc\" line=\"1\">- (JSValue *)evaluateScript:(NSString *)script;<\/pre>\n<p>F\u3001JSValue\u4e0eOC\u6570\u636e\u8f6c\u6362\u5bf9\u5e94\u5173\u7cfb<\/p>\n<pre lang=\"objc\" line=\"1\">\n@textblock\n???Objective-C type? |?? JavaScript type\n?--------------------+---------------------\n?????????nil???????? |???? undefined\n????????NSNull?????? |??????? null\n???????NSString????? |?????? string\n???????NSNumber????? |?? number, boolean\n?????NSDictionary??? |?? Object object\n???????NSArray?????? |??? Array object\n????????NSDate?????? |???? Date object\n???????NSBlock (1)?? |?? Function object (1)\n??????????id (2)???? |?? Wrapper object (2)\n????????Class (3)??? | Constructor object (3)\n@\/textblock\n<\/pre>\n<p><strong>6\u3001Demo\u4e0b\u8f7d<\/strong><\/p>\n<p><a href=\"http:\/\/www.yusian.com\/blog\/wp-content\/uploads\/2016\/07\/SAJavaScript.zip\">SAJavaScript<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001\u5728iOS\u9879\u76ee\u5f00\u53d1\u4e2d\uff0c\u539f\u751f\u9875\u9762\u4e2d\u63ba\u6742Html5\u9875\u9762\u5df2\u4e0d\u662f\u4ec0\u4e48\u65b0\u9c9c\u4e8b\u4e86\uff0c\u6bd5\u7adfH5\u4e5f\u4ed6\u76f8\u5173\u7684\u4f18\u52bf\uff0c\u6bd4\u5982\u5e03\u5c40\u3001\u5bcc\u6587\u672c\u5185\u5bb9\u5c55\u793a\u7b49\uff1b 2\u3001\u968f\u7740H5\u9875\u9762\u7684\u4fb5\u5165\uff0cOC\u4e0eJS\u7684\u4ea4\u4e92\u610f\u613f\u8d8a\u6765\u8d8a\u5f3a\u70c8\uff0c\u5c31\u76ee\u524d\u6765\u770b\uff0c\u5728\u4e0d\u5f15\u7528\u7b2c\u4e09\u65b9\u5e93\u7684\u524d\u63d0\u4e0b\uff0c\u6709\u4e24\u79cd\u65b9\u5f0f\u53ef\u4ee5\u89e3\u51b3\uff1b 2.1\u3001iOS6\u53ca\u4ee5\u524d\u901a\u8fc7\u62e6\u622aNSRequest\u8bf7\u6c42\u6765\u8c03\u7528\u539f\u751f\u65b9\u6cd5\u8fdb\u884c\u4ea4\u4e92\uff1b 2.2\u3001iOS7\u53ca\u4ee5\u540e\u7684\u7248\u672c\u82f9\u679c\u5b98\u65b9\u5f15\u5165\u4e86JavaScriptCore\u6846\u67b6\uff1b 3\u3001\u62e6\u622aNSRequest\u8bf7\u6c42 A\u3001UIwebView\u6709\u4e2a\u4ee3\u7406\u65b9\u6cd5\uff1a &#8211; (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType; B\u3001\u6b64\u65b9\u6cd5\u901a\u8fc7\u8fd4\u56deYES\/NO\u6765\u51b3\u5b9a\u662f\u5426\u8df3\u8f6c\u5230request\u7684\u9875\u9762\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u534f\u8bae\u5934\u6765\u533a\u5206\u662f\u6b63\u5e38\u7684URL\u8bf7\u6c42\u8fd8\u662f\u672c\u5730\u65b9\u6cd5\u7684\u8c03\u7528\u8bf7\u6c42\uff1b<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[20],"class_list":["post-141","post","type-post","status-publish","format-standard","hentry","category-project","tag-basics"],"_links":{"self":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/141","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/comments?post=141"}],"version-history":[{"count":0,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/posts\/141\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/media?parent=141"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/categories?post=141"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yusian.com\/blog\/wp-json\/wp\/v2\/tags?post=141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}