所有，我失去了理智。我有一个类，下面的代码传递了一个NSArray＆＃34; Events＆＃34;到我的View Controller：
+ (NSArray *)eventsFromJSON:(NSData *)objectNotation error:(NSError **)error {
NSError *localError = nil;
NSArray *parsedObject = [NSJSONSerialization JSONObjectWithData:objectNotation options:0 error:&localError];
if (localError != nil) {
*error = localError;
return nil;
}
NSMutableArray *events = [[NSMutableArray alloc] init];
//NSArray *results = [parsedObject valueForKey:@"results"];
NSLog(@"Count %lu", (unsigned long)parsedObject.count);
for (NSDictionary *eventDic in parsedObject) {
Event *event = [[Event alloc] init];
for (NSString *key in eventDic) {
if ([event respondsToSelector:NSSelectorFromString(key)]) {
[event setValue:[eventDic valueForKey:key] forKey:key];
}
}
[events addObject:event];
}
return events;
}
在我的视图控制器上，我有以下代码：
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"eventCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
// Configure the cell...
Event *event = [self.eventData objectAtIndex:indexPath.row];
cell.textLabel.text = event.title;
cell.detailTextLabel.text = event.link;
return cell;
}
- (void) didReceiveEvents:(NSArray *)events {
self.eventData = [events copy];
dispatch_async(dispatch_get_main_queue(), ^{
[self.tableView reloadData];
});
}
JSON我解析的示例如下：
[
{
"ID": 576,
"title": “Event Title“,
"status": "publish",
"type": "tribe_events",
"author": {
"ID": 1,
"username": "admin",
"name": "admin",
"first_name": “Name”,
"last_name": “Last”,
"nickname": "admin",
"slug": "admin",
"URL": "",
"avatar": "1.gravatar.com/avatar/",
"description": "",
"registered": "-001-11-30T00:00:00+00:00",
"meta": {
"links": {
"self": "url.com/wp-json/users/1",
"archives": "url.com/wp-json/users/1/posts"
}
}
},
"content": "<p>Join us if you are interested.</p>\n",
"parent": {
"ID": 575,
"title": “Title”,
"status": "publish",
"type": "tribe_events",
"author": {
"ID": 1,
"username": "admin",
"name": "admin",
"first_name": “First”,
"last_name": “Last”,
"nickname": "admin",
"slug": "admin",
"URL": "",
"avatar": "1.gravatar.com/avatar/?s=96",
"description": "",
"registered": "-001-11-30T00:00:00+00:00",
"meta": {
"links": {
"self": "url.com/wp-json/users/1",
"archives": "url.com/wp-json/users/1/posts"
}
}
},
"content": "<p>Join us if you are interested in joining </p>\n",
"parent": 0,
"link": "url.com/calendar/worship-service-practice/2014-12-06/",
"date": "2014-12-04T20:09:21-06:00",
"modified": "2014-12-04T20:09:21-06:00",
"format": "standard",
"slug": "worship-service-practice",
"guid": "url.com/?post_type=tribe_events&p=575",
"excerpt": "<p>Join us if you are interested i</p>\n",
"menu_order": 0,
"comment_status": "closed",
"ping_status": "closed",
"sticky": false,
"date_tz": "America/Chicago",
"date_gmt": "2014-12-05T02:09:21+00:00",
"modified_tz": "America/Chicago",
"modified_gmt": "2014-12-05T02:09:21+00:00",
"meta": {
"links": {
"self": "url.com/wp-json/posts/575",
"author": "url.com/wp-json/users/1",
"collection": "url.com/wp-json/posts",
"replies": "url.com/wp-json/posts/575/comments",
"version-history": "url.com/wp-json/posts/575/revisions"
}
},
"post_meta": {
"EventStartDate": "2014-12-06 08:00:00",
"EventEndDate": "2014-12-06 09:00:00"
},
"featured_image": null,
"terms": {
"tribe_events_cat": [
{
"ID": 13,
"name": "Community Outreach",
"slug": "community-outreach",
"description": "",
"parent": null,
"count": 52,
"link": "url.com/calendar/category/community-outreach/",
"meta": {
"links": {
"collection": "url.com/wp-json/taxonomies/tribe_events_cat/terms",
"self": "url.com/wp-json/taxonomies/tribe_events_cat/terms/9"
}
}
}
]
}
},
"link": "url.com/calendar/worship-service-practice/2014-12-13/",
"date": "2014-12-04T20:09:21-06:00",
"modified": "2014-12-04T20:09:21-06:00",
"format": "standard",
"slug": "worship-service-practice-2014-12-13",
"guid": "url.com/?post_type=tribe_events&eventDate=2014-12-13#038;p=575",
"excerpt": "<p>Join us if you are interested </p>\n",
"menu_order": 0,
"comment_status": "closed",
"ping_status": "closed",
"sticky": false,
"date_tz": "America/Chicago",
"date_gmt": "2014-12-05T02:09:21+00:00",
"modified_tz": "America/Chicago",
"modified_gmt": "2014-12-05T02:09:21+00:00",
"meta": {
"links": {
"self": "url.com/wp-json/posts/576",
"author": "url.com/wp-json/users/1",
"collection": "url.com/wp-json/posts",
"replies": "url.com/wp-json/posts/576/comments",
"version-history": "url.com/wp-json/posts/576/revisions",
"up": "url.com/wp-json/posts/575"
}
},
"post_meta": {
"EventStartDate": "2014-12-13 08:00:00",
"EventEndDate": "2014-12-13 09:00:00"
},
"featured_image": null,
"terms": {
"tribe_events_cat": [
{
"ID": 13,
"name": "Community Outreach",
"slug": "community-outreach",
"description": "",
"parent": null,
"count": 52,
"link": "url.com/calendar/category/community-outreach/",
"meta": {
"links": {
"collection": "url.com/wp-json/taxonomies/tribe_events_cat/terms",
"self": "url.com/wp-json/taxonomies/tribe_events_cat/terms/9"
}
}
}
]
}
},
{…
我无法为我的生活获取Event类中的数据以显示在表格上。我有10个空行显示在表格上，但没有文字。当我将NSLog抛入cellForRowAtIndexPath函数并尝试打印event.title时，它会记录为null。关于我做错什么的任何想法？
答案 0 :(得分：0)
您永远不会设置event.title。你遍历json的方式也是不正确的。如果它是属性，你应该这样设置：
for(NSDictionary *eventDic in [parsedObject objectForKey:@"results"]){
Event *event = [[Event alloc] init];
event.title = eventDic[@"title"]; //shorthand for [eventDic objectForKey:@"title"];
event.link = eventDic[@"link"];
[events addObject:event];
}
答案 1 :(得分：0)
事实证明我的代码很好，但是当我设置我的Event类时，我将属性设置为弱而强。一旦使属性属性变强，它就会保留所有指针，并且一切都很好。