//若为txt文档
if([encodedString hasSuffix:@".txt"]){ NSData* Data = [NSData dataWithContentsOfURL:weburl]; NSString* aStr = [[NSString alloc] initWithData:Data encoding:NSUTF8StringEncoding]; if (!aStr) { aStr=[[NSString alloc] initWithData:Data encoding:0x80000632]; } if (!aStr) { aStr=[[NSString alloc] initWithData:Data encoding:0x80000631]; }// NSString* aStr = [[NSString alloc] initWithData:Data encoding:0x80000632]; NSString* responseStr = [NSString stringWithFormat: @"<HTML>" "<head>" "<title>Text View</title>" "</head>" "<BODY>" "<pre>" "%@" "</pre>" "</BODY>" "</HTML>", aStr]; [showPdfWebview loadHTMLString:responseStr baseURL:weburl]; [aStr release];