【发布时间】：2013-11-29 04:46:33
【问题描述】：
我无法将我的旧代码更新为使用 AFNetworking 进行异步调用的新代码，该代码将同步 JSOn 调用。
在我的旧代码中，我使用日期字符串（“release_date”）将单元格与 UICollectionReusableView 进行分组，所有这些都是在 viewDidLoad 中完成的。现在使用 AFNetworking，我将所有内容都移出 viewDidLoad，所以我一直在努力弄清楚如何将旧代码与新代码合并。
这是我必须用 AFNetworking 解析我的 JSON 的新代码：
- (void)viewDidLoad
{
[super viewDidLoad];
self.upcomingReleases = [[NSMutableArray alloc] init];
[self makeReleasesRequests];
[self.collectionView registerClass:[ReleaseCell class] forCellWithReuseIdentifier:@"ReleaseCell"];
}
-(void)makeReleasesRequests //AFNetworking Call
{
NSURL *url = [NSURL URLWithString:@"http://www.soleresource.com/upcoming.json"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
operation.responseSerializer = [AFJSONResponseSerializer serializer];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"@");
self.upcomingReleases = [responseObject objectForKey:@"upcoming_releases"];
[self.collectionView reloadData];
} failure:nil];
[operation start];
}
在我开始使用 AFNetworking 进行 JSON 调用和“分组”我的单元之前，我在 viewDidLoad 中的代码：
- (void)viewDidLoad
{
[super viewDidLoad];
NSURL *upcomingReleaseURL = [NSURL URLWithString:@"http://www.soleresource.com/upcoming.json"];
NSData *jsonData = [NSData dataWithContentsOfURL:upcomingReleaseURL];
NSError *error = nil;
NSDictionary *dataDictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];
NSArray *upcomingReleasesArray = [dataDictionary objectForKey:@"upcoming_releases"];
//This is the dateFormatter we'll need to parse the release dates
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"];
NSTimeZone *est = [NSTimeZone timeZoneWithAbbreviation:@"EST"];
[dateFormatter setTimeZone:est];
[dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"]]; //A bit of an overkill to avoid bugs on different locales
//Temp array where we'll store the unsorted bucket dates
NSMutableArray *unsortedReleaseWeek = [[NSMutableArray alloc] init];
NSMutableDictionary *tmpDict = [[NSMutableDictionary alloc] init];
for (NSDictionary *upcomingReleaseDictionary in upcomingReleasesArray) {
//We find the release date from the string
NSDate *releaseDate = [dateFormatter dateFromString:[upcomingReleaseDictionary objectForKey:@"release_date"]];
//We create a new date that ignores everything that is not the actual day (ignoring stuff like the time of the day)
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components =
[gregorian components:(NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit) fromDate:releaseDate];
//This will represent our releases "bucket"
NSDate *bucket = [gregorian dateFromComponents:components];
//We get the existing objects in the bucket and update it with the latest addition
NSMutableArray *releasesInBucket = [tmpDict objectForKey:bucket];
if (!releasesInBucket){
releasesInBucket = [NSMutableArray array];
[unsortedReleaseWeek addObject:bucket];
}
UpcomingRelease *upcomingRelease = [UpcomingRelease upcomingReleaseWithName:[upcomingReleaseDictionary objectForKey:@"release_name"]];
upcomingRelease.release_date = [upcomingReleaseDictionary objectForKey:@"release_date"];
upcomingRelease.release_date = [upcomingReleaseDictionary objectForKey:@"release_date"];
[releasesInBucket addObject:upcomingRelease];
[tmpDict setObject:releasesInBucket forKey:bucket];
}
[unsortedReleaseWeek sortUsingComparator:^NSComparisonResult(id obj1, id obj2) {
NSDate* date1 = obj1;
NSDate* date2 = obj2;
//This will sort the dates in ascending order (earlier dates first)
return [date1 compare:date2];
//Use [date2 compare:date1] if you want an descending order
}];
self.releaseWeekDictionary = [NSDictionary dictionaryWithDictionary:tmpDict];
self.releaseWeek = [NSArray arrayWithArray:unsortedReleaseWeek];
[self.collectionView registerClass:[ReleaseCell class] forCellWithReuseIdentifier:@"ReleaseCell"];
}
CollectionViewCell
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
static NSString *identifier = @"Cell";
ReleaseCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
// Part of my new code AFNetworking
NSDictionary *upcomingReleaseDictionary = [self.upcomingReleases objectAtIndex:indexPath.row];
//
// I had this in my old code
UpcomingRelease *upcomingRelease = [self.releaseWeekDictionary objectForKey:self.releaseWeek[indexPath.section]][indexPath.row];
//
cell.release_name.text = upcomingRelease.release_name;
return cell;
}
这是剩下的：
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
return [self.releaseWeek count];
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return [[self.releaseWeekDictionary objectForKey:self.releaseWeek[section]] count];
}
-(UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{
ReleaseWeek *releaseWeek = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"releaseWeek" forIndexPath:indexPath];
//We tell the formatter to produce a date in the format "Name-of-the-month day"
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"MMMM dd"];
NSTimeZone *est = [NSTimeZone timeZoneWithAbbreviation:@"EST"];
[dateFormatter setTimeZone:est];
[dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"]];
//We read the bucket date and feed it to the date formatter
NSDate *releaseWeekDate = self.releaseWeek[indexPath.section];
releaseWeek.releaseDate.text = [[dateFormatter stringFromDate:releaseWeekDate] uppercaseString];
return releaseWeek;
}
我基本上是想弄清楚如何将分组我的单元格的代码作为日期字符串并将其与我的新代码集成。
谢谢。
【问题讨论】：
标签： ios objective-c json afnetworking uicollectionviewcell