iOS中，JS于OC的相互调用

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1.

<!DOCTYPE html>

<head>

<title>OCJS互调</title>

</head>

<body>

周杰伦

110

Call

</button>

<br>

<a href="https://www.baidu.com/">百度一下就知道了</a>

</body>

function ocCallJsNoParams() {

alert("oc调用js无参数");

}

function ocCallJsHsParams(name , address){

alert(name+"的地址是："+address);

}

function jsCallOc(){

location.href = 'InternetProtocol://Parameter1_withParameter2_?name&age';

}

</script>

</html>

用WebView加载以上的静态网页。

2.

#import "NSObject+JSCallOC.h"

@implementation NSObject (JSCallOC)

-(id)t_performSelector:(SEL)aSelector withObject:(NSArray *)objects{

// signature记录方法的返回值和参数类型

NSMethodSignature *signature = [[selfclass] instanceMethodSignatureForSelector:aSelector];

if (signature == nil) {

// 签名没有抛出异常

NSString *reason = [NSStringstringWithFormat:@"没有%@的方法",NSStringFromSelector(aSelector)];

NSException *exception = [NSExceptionexceptionWithName:@"错误"reason:reason userInfo:nil];

@throw exception;

}

// NSInvocation包装了一次方法的调用(方法的调用者，方法名，参数，返回值)

NSInvocation *invocation = [NSInvocationinvocationWithMethodSignature:signature];

invocation.target =self;//指定方法的调用

invocation.selector = aSelector;//指定方法名

// 设置参数

NSInteger parameterCount = signature.numberOfArguments -2;

parameterCount = MIN(parameterCount, objects.count);

for (int i =0 ; i < parameterCount; i ++) {

id param = objects[i];

// 剔除空参数

if (![param isKindOfClass:[NSNullclass]]) {

[invocation setArgument:&paramatIndex:i +2];

}

// 调用

[invocation invoke];

// 设置方法的返回值

id returnValue =nil;

if (signature.methodReturnLength) {

[invocation getReturnValue:&returnValue];

}

return returnValue;

}

3.

#import "ViewController.h"

#import "NSObject+JSCallOC.h"

@interface ViewController ()<UIWebViewDelegate>

@property (weak,nonatomic) IBOutletUIWebView *webView;

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

[self.webViewloadRequest:[NSURLRequestrequestWithURL:[[NSBundlemainBundle] URLForResource:@"ocjs.html"withExtension:nil]]];

self.webView.delegate =self;

}

#pragma mark -- webViewDelegate

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

//获取url全路径

NSString *url = request.URL.absoluteString;

NSString *protocol =@"internetprotocol://";

if ([url hasPrefix:protocol]) {

//获取协议后的路径

NSString *path = [urlsubstringFromIndex:protocol.length];

//利用占位符分割方法名和参数

NSArray *subPath = [pathcomponentsSeparatedByString:@"?"];

//获取方法名

NSString *methodName = [subPath.firstObjectstringByReplacingOccurrencesOfString:@"_"withString:@":"];

//获取参数

NSArray *params =nil;

if (subPath.count ==2) {

params = [subPath.lastObjectcomponentsSeparatedByString:@"&"];

}

SEL sel =sel_registerName([methodName UTF8String]);

//调用方法

[selft_performSelector:sel withObject:params];

return NO;

}

return YES;

}

//oc -----> js

-(void)webViewDidFinishLoad:(UIWebView *)webView{

NSString *javaScript =@"ocCallJsNoParams()";

// NSString *javaScript = [NSString stringWithFormat:@"ocCallJsHsParams('%@' , '%@')",@"无限",@"WIFI"];

[webView stringByEvaluatingJavaScriptFromString:javaScript];

}

//js --- >oc

-(void)call:(NSString *)name{

NSLog(@"参数是：%@",name);

NSLog(@"%s",__FUNCTION__);

}

-(void)Parameter1:(NSString *)parameter1 withParameter2:(NSString *)parameter2{

NSLog(@"%@---%@",parameter1,parameter2);

}

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