oc和js互调

来源：互联网发布：创客软件下载编辑：程序博客网时间：2024/06/10 23:18

html代码：

<!DOCTYPE html><html> <head> <meta charset="UTF-8"> <title>Mitchell</title>

function show() { alert(1); }

function showTittle() { alert(document.title); }

function aaa() { location.href="https://www.baidu.com/"; }

function btnClick(){ location.href="mitchell://call"; }

function btnClickTwo(){ location.href="mitchell://callWithNumber_?10086"; }

function btnClickThree(){ location.href="mitchell://sendMessageWithNumber_WithContent_?10086&love"; } </script>

</head>

<body> <style type="text/css"> .test { color: blue; } #op { color: orange; } .outer table, .pp { color: green; } input[type=text] { color: yellow; } </style> <div class="outer"> <label for=“username”>姓名</label> <button style="background:red; height:150px; weight:150px;" onclick="btnClickThree();">哥是按钮</button> </div> </body></html>

oc代码：

- (void)viewDidLoad { [super viewDidLoad]; NSURL*url = [[NSBundle mainBundle] URLForResource:@"test.html" withExtension:nil]; NSURLRequest*request = [NSURLRequest requestWithURL:url]; self.webView.delegate =self; [self.webView loadRequest:request];}-(void)webViewDidFinishLoad:(UIWebView *)webView{

//OC调用JS，只要利用UIWebView的stringByEvaluatingJavaScriptFromString方法，告诉系统

[self.webView stringByEvaluatingJavaScriptFromString:@"show();"];

}

js调oc：

- (void)viewDidLoad {

[super viewDidLoad];

NSURL*url = [[NSBundle mainBundle] URLForResource:@"test.html" withExtension:nil];

NSURLRequest*request = [NSURLRequest requestWithURL:url];

self.webView.delegate =self; [self.webView loadRequest:request];

}

//每次请求都会调用//利用该方法作为JS和OC之间的桥梁

//JS跳转网页

//在OC代理方法中通过判断自定义协议头，决定是否是JS调用OC方法

//在OC代理方法中通过截取字符串，获取JS想调用的OC方法名称

-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{

// NSLog(@"%@",request.URL);

//JS调用OC 无参数

// NSString*schem = @"mitchell://";

// NSString*urlStr = request.URL.absoluteString;

// if ([urlStr hasPrefix:schem]) {// NSLog(@"调用OC方法");

//1、从URL汇总获取方法名称

// //Mitchell：//call

// NSString*methodName = [urlStr substringFromIndex:schem.length];

// NSLog(@"%@",methodName);

// //2、调用方法// SEL sel = NSSelectorFromString(methodName);

// //下面这一行代码是用于指定忽略警告信息

// //忽略警告信息的作用开始//#pragma clang diagnostic push

// //忽略的警告信息//#pragma clang diagnostic ignored"-Warc-performSelector-leaks"

// [self performSelector:sel withObject:nil];//

//忽略警告信息的作用结束//#pragma clang diagnostic pop//// return NO;// }

//1个参数// NSString*schem = @"mitchell://";// NSString*urlStr = request.URL.absoluteString;// if ([urlStr hasPrefix:schem]) {// NSLog(@"调用OC方法");// //1、从URL汇总获取方法名称// NSString*subPath = [urlStr substringFromIndex:schem.length];// //注意：如果制定的用于切割字符串不存在，就会返回整个字符串// NSArray*subPaths = [subPath componentsSeparatedByString:@"?"];// //2、获取方法名称// NSString*methodName = [subPaths firstObject];// methodName = [methodName stringByReplacingOccurrencesOfString:@"_" withString:@":"];// NSLog(@"%@",methodName);// //3、调用方法// SEL sel = NSSelectorFromString(methodName);// NSString*params = nil;// if (subPaths.count ==2) {// params = [subPaths lastObject];// }// [self performSelector:sel withObject:params];// return NO;// } //2个参数// NSString*schem = @"mitchell://";// NSString*urlStr = request.URL.absoluteString;// if ([urlStr hasPrefix:schem]) {// NSLog(@"调用OC方法");// //1、从URL汇总获取方法名称// NSString*subPath = [urlStr substringFromIndex:schem.length];// //注意：如果制定的用于切割字符串不存在，就会返回整个字符串// //sendMessageWithNumber_WithContent_?10086&love// NSArray*subPaths = [subPath componentsSeparatedByString:@"?"];// //2、获取方法名称// NSString*methodName = [subPaths firstObject];// methodName = [methodName stringByReplacingOccurrencesOfString:@"_" withString:@":"];// //3、调用方法// SEL sel = NSSelectorFromString(methodName);// NSString*param = nil;// if (subPaths.count ==2) {// param = [subPaths lastObject];// //3、截取参数// NSArray*params = [param componentsSeparatedByString:@"&"];// [self performSelector:sel withObject:[params firstObject] withObject:[params lastObject]];// return NO;// }// [self performSelector:sel withObject:param];// return NO;// }

//多个参数，这里使用了用NSInvocation封装的一个类

NSString*schem = @"mitchell://";

NSString*urlStr = request.URL.absoluteString;

if ([urlStr hasPrefix:schem]) { NSLog(@"调用OC方法");

//1、从URL汇总获取方法名称

NSString*subPath = [urlStr substringFromIndex:schem.length];

//注意：如果制定的用于切割字符串不存在，就会返回整个字符串

//sendMessageWithNumber_WithContent_?10086&love

NSArray*subPaths = [subPath componentsSeparatedByString:@"?"];

//2、获取方法名称

NSString*methodName = [subPaths firstObject];

methodName = [methodName stringByReplacingOccurrencesOfString:@"_" withString:@":"];

//3、调用方法 SEL sel = NSSelectorFromString(methodName); NSArray *params = nil; if (subPaths.count ==2) {

//3、截取参数 params = [[subPaths lastObject] componentsSeparatedByString:@"&"];

[self performSelector:sel withObjects:params]; return NO;

}

[self performSelector:sel withObjects:params];

return NO;

}

return YES;

}

https://github.com/mcmengchen/iOS---MIthcell-NSInvocation/blob/master/Mitchell%20-%20NSInvocation/Mitchell%20-%20NSInvocation/NSObject%2BperformSelector.m

作者：Mitchell
链接：http://www.jianshu.com/p/eddb140f3311
來源：简书
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