iphone - 如何解析 Objective-C 中 iframe 标签的 src 属性？

Question

我有以下字符串:

<iframe width="1280" height="720" src="http://www.youtube.com/embed/Pb55ep-DrSo?wmode=opaque&autoplay=1&fs=1&feature=oembed&showinfo=0&autohide=1&controls=0" frameborder="0" allowfullscreen></iframe>

我想提取 src 属性，但不确定如何在 Objective-C 中解析它？

Answer 1

这很丑陋，但它有效:

NSString* str = @"<iframe width=\"1280\" height=\"720\" src=\"http://www.youtube.com/embed/Pb55ep-DrSo?wmode=opaque&autoplay=1&fs=1&feature=oembed&showinfo=0&autohide=1&controls=0\" frameborder=\"0\" allowfullscreen></iframe>";
str = [str substringFromIndex:[str rangeOfString:@"src=\""].location+[str rangeOfString:@"src=\""].length];
str = [str substringToIndex:[str rangeOfString:@"\""].location ];
NSLog(@"Str %@",str);

我测试了它，它输出:

2012-08-17 09:16:55.285 TEST[24413:c07] Str http://www.youtube.com/embed/Pb55ep-DrSo?wmode=opaque&autoplay=1&fs=1&feature=oembed&showinfo=0&autohide=1&controls=0