[英]passing parameters from objective to javascript
我想從Objective-C向javascript發送一些NSString
值。 這是代碼:
Javascript.html
<!DOCTYPE html>
<html>
<head>
<title>Sample Page that Writes Out an HTML Addition Table</title>
<script src=“doc.js”></script>
</head>
<body>
</body>
</html>
doc.js
function call(str){
document.write('<table border="1" cellspacing="1" cellpadding="5">')
for(i = 0; i < 4; i++){
document.write('<tr>')
for (j = 0; j < 3; j++){
document.write('<td>'+str+'<img src= '+str+'> </img></td>')
}
document.write('</tr>')
}
document.write('</table>')
}
.m文件
-(IBAction) show:(id) sender{
NSString *htmlpath = [[NSBundle mainBundle] pathForResource:@"Javascript" ofType:@"html"];
NSString *html =[NSString stringWithContentsOfFile:htmlpath encoding:NSUTF8StringEncoding error:nil];
NSURL *baseURl = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@",[[NSBundle mainBundle] bundlePath]] ];
[[webView mainFrame] loadHTMLString:html baseURL:baseURl];
NSString *jsTable=[NSString stringWithFormat:@"call('file:///Users/developer/Library/Billing/Barcodes/CO_BAT01_14.png')"];
NSLog(@"jsTable = %@",jsTable);
[webView stringByEvaluatingJavaScriptFromString:jsTable];
[jsTable release];
}
我想從我的應用程序將圖像路徑發送到.js文件。 任何人都可以幫助我解決我的問題!!! 提前致謝。
在執行javascript之前,您應該等待HTML加載。 為您的WebView設置frameLoadDelegate
並實現此方法:
- (void)webView:(WebView *)sender didFinishLoadForFrame:(WebFrame *)frame
{
NSString *jsTable=[NSString stringWithFormat:@"call('file:///Users/developer/Library/Billing/Barcodes/CO_BAT01_14.png')"];
NSLog(@"jsTable = %@",jsTable);
[sender stringByEvaluatingJavaScriptFromString:jsTable];
[jsTable release];
}
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