RaptureXML を使用して各項目を取得し、テーブル セル内に表示する XML パーサーがあります。タイトルと説明はすでに取得できていますが、日付を取得する方法がわかりません。
これが私がこれまでにデートのために持っているものです:
NSString* dateString;
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"EEEE MMMM d, YYYY"];
dateString = [formatter stringFromDate:self.pubDate];
[articleAbstract appendAttributedString:
[[NSAttributedString alloc] initWithString: dateString]
];
デバッガーにこれが表示され続けます:
'NSInvalidArgumentException', reason: 'NSConcreteAttributedString initWithString:: nil value'
何が間違っているのかわかりません。完全なコードは次のとおりです。
RSSItem.h
#import <Foundation/Foundation.h>
@interface RSSItem : NSObject
@property (strong, nonatomic) NSString* title;
@property (strong, nonatomic) NSString* description;
@property (strong, nonatomic) NSURL* link;
@property (strong, nonatomic) NSAttributedString* cellMessage;
@property (strong, nonatomic) NSDate* pubDate;
@property (strong, nonatomic) NSString* dateString;
@end
RSSItem.m
#import "RSSItem.h"
#import "GTMNSString+HTML.h"
@implementation RSSItem
-(NSAttributedString*)cellMessage
{ if (_cellMessage!=nil) return _cellMessage;
NSDictionary* boldStyle = @{NSFontAttributeName: [UIFont fontWithName:@"Helvetica-Bold" size:16.0]};
NSDictionary* normalStyle = @{NSFontAttributeName: [UIFont fontWithName:@"Helvetica" size:16.0]};
NSMutableAttributedString* articleAbstract = [[NSMutableAttributedString alloc] initWithString:self.title];
[articleAbstract setAttributes:boldStyle
range:NSMakeRange(0, self.title.length)];
[articleAbstract appendAttributedString:
[[NSAttributedString alloc] initWithString:@"\n\n"]
];
// Parse for date
NSString* dateString;
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"EEEE MMMM d, YYYY"];
dateString = [formatter stringFromDate:self.pubDate];
[articleAbstract appendAttributedString:
[[NSAttributedString alloc] initWithString: dateString]
];
[articleAbstract appendAttributedString:
[[NSAttributedString alloc] initWithString:@"\n\n"]
];
int startIndex = [articleAbstract length];
NSString* description = [NSString stringWithFormat:@"%@...", [self.description substringToIndex:100]];
description = [description gtm_stringByUnescapingFromHTML];
[articleAbstract appendAttributedString:
[[NSAttributedString alloc] initWithString: description]
];
[articleAbstract setAttributes:normalStyle
range:NSMakeRange(startIndex, articleAbstract.length - startIndex)];
_cellMessage = articleAbstract;
return _cellMessage;
}
@end
編集:ここに私のRSSローダーがあります
#import "RSSItem.h"
#define kBgQueue dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
@implementation RSSLoader
-(void)fetchRssWithURL:(NSURL*)url complete:(RSSLoaderCompleteBlock)c
{
dispatch_async(kBgQueue, ^{
//work in the background
RXMLElement *rss = [RXMLElement elementFromURL: url];
RXMLElement* title = [[rss child:@"channel"] child:@"title"];
RXMLElement* pubDate = [[rss child:@"channel"] child:@"pubDate"];
NSString *usableDate = [pubDate];
NSArray* items = [[rss child:@"channel"] children:@"item"];
NSMutableArray* result = [NSMutableArray arrayWithCapacity:items.count];
//more code
for (RXMLElement *e in items) {
//iterate over the articles
RSSItem* item = [[RSSItem alloc] init];
item.title = [[e child:@"title"] text];
item.pubDate = usableDate
item.description = [[e child:@"description"] text];
item.link = [NSURL URLWithString: [[e child:@"link"] text]];
[result addObject: item];
}
c([title text], result);
});
}
誰かが私の日付を正しく解析するのを手伝ってくれませんか?