Question

ios怎么实现点击webview按钮调用oc代码

Answer 1

我们用 javascriptCore.framework 这个库。
首先在建立一个UIWebView，代码如下：
#import "webview.h"
#import <JavaScriptCore/JavaScriptCore.h>

@implementation webview

-(id)initWithFrame:(CGRect)frame
{
self=[super initWithFrame:frame];

if( self ){
self.webview=[[UIWebView alloc]initWithFrame:CGRectMake(0, 310, self.bounds.size.width, 300)];
self.webview.backgroundColor=[UIColor lightGrayColor];
NSString *htmlPath=[[NSBundle mainBundle] resourcePath];
htmlPath=[htmlPath stringByAppendingPathComponent:@"html/index.html"];
NSURL *localURL=[[NSURL alloc]initFileURLWithPath:htmlPath];
[self.webview loadRequest:[NSURLRequest requestWithURL:localURL]];
[self addSubview:self.webview];

JSContext *context = [self.webview valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
context[@"log"] = ^() {

NSLog(@"+++++++Begin Log+++++++");
NSArray *args = [JSContext currentArguments];

for (JSValue *jsVal in args) {
NSLog(@"%@", jsVal);
}

JSValue *this = [JSContext currentThis];
NSLog(@"this: %@",this);
NSLog(@"-------End Log-------");

};

}
return self;
}

@end