第三方：TFHpple
#import "TFHpple.h"
TFHpple *hpple = [TFHpple hppleWithHTMLData:data encoding:@"utf-8"];
NSArray *eles = [hpple searchWithXPathQuery:@"//div[@class='article block untagged mb15']"];
[eles enumerateObjectsUsingBlock:^(TFHppleElement *obj, NSUInteger idx, BOOL * _Nonnull stop) {
NSArray *tempArr = [obj searchWithXPathQuery:@"//div[@class='content']//span"];
TFHppleElement *e = tempArr.firstObject;
NSString *content = e.content;
NSArray *tempArr2 = [obj searchWithXPathQuery:@"//div[@class='author clearfix']/a[@href]/img[@src]"];
TFHppleElement *e2 = tempArr2.firstObject;
NSString *content2 = e2.attributes[@"src"];
CellItem *item = [[CellItem alloc]initWithContentString:content andImageURL:content2];
[_datas addObject:item];
}];
