Hpple使用Objective-C解析HTML [英] Hpple parsing HTML with Objective-C
问题描述
我遵循 RayWendErlich 的教程解析HTML节点。
我从 index.html
获取内容。
我尝试使用此方法获取背景值。
+ (void)parseWithHTMLString:(NSString *)string
{
NSData * data = [string dataUsingEncoding:NSUTF8StringEncoding];
TFHpple * parser = [TFHpple hppleWithData:data isXML:NO];
NSString * XpathQueryString = @// div [class ='content'] / div / div;
NSArray * nodes = [parser searchWithXPathQuery:XpathQueryString];
NSLog(@%@,nodes);
NSMutableArray * resultArray = [[NSMutableArray alloc] initWithCapacity:0];
for(TFHppleElement *节点中的元素){
Model * model = [[Model alloc] init];
model.colorString = [element objectForKey:@style];
[resultArray addObject:model];
//NSLog(@\"%@\",model.colorString);
所以问题是:
我做错了什么?
解决方案在您的代码中出现小错误。
- 您使用的xPath不正确。您在
class
前缺少 @
。
- code> background key是一个属性,所以你需要为
TFHppleElement
查询它的属性
property(它是一个字典),并通过 objectForKey:
获取它的值。
这是最终的代码:
NSArray * nodes = [parser searchWithXPathQuery:@// div [类= '内容'] / DIV / DIV];
$ b $ for(TFHppleElement *节点中的元素){
NSLog(@%@,[element.attributes objectForKey:@style]);
$ / code>
控制台输出为:
背景:#D93D59
背景:#E7923D
背景:#768479
背景:#EBBA95 >
背景:#E26967
背景:#BF343F
背景:#254159
背景:#F2F2F2
背景:#D9A577
背景:#BF8969
背景:#04000D
...
I've follow the tutorial from RayWendErlich to parse HTML node.
I get the content from an index.html
.
I've try to use this method to fetch the background value.
+ (void)parseWithHTMLString:(NSString *)string
{
NSData *data = [string dataUsingEncoding:NSUTF8StringEncoding];
TFHpple *parser = [TFHpple hppleWithData:data isXML:NO];
NSString *XpathQueryString = @"//div[class='content']/div/div";
NSArray *nodes = [parser searchWithXPathQuery:XpathQueryString];
NSLog(@"%@",nodes);
NSMutableArray *resultArray = [[NSMutableArray alloc] initWithCapacity:0];
for (TFHppleElement *element in nodes) {
Model *model = [[Model alloc] init];
model.colorString = [element objectForKey:@"style"];
[resultArray addObject:model];
//NSLog(@"%@",model.colorString);
}
}
So the question is:
What I had done wrong?
解决方案 There are 2 small errors in your code.
- The xPath you used is not correct. You're missing an
@
in front of class
.
- The
background
key is an attribute, so you need to ask the TFHppleElement
for its attributes
property (which is a dictionary) and get its value via objectForKey:
.
This is the final code:
NSArray *nodes = [parser searchWithXPathQuery:@"//div[@class='content']/div/div"];
for (TFHppleElement *element in nodes) {
NSLog(@"%@",[element.attributes objectForKey:@"style"]);
}
The console output is:
background: #D93D59
background: #E7923D
background: #768479
background: #EBBA95
background: #E26967
background: #BF343F
background: #254159
background: #F2F2F2
background: #D9A577
background: #BF8969
background: #04000D
...
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