我有一个问题，当我点击一个单元格时，没有任何反应，当我点击第二个单元格显示上一个单元格（或我先点击的那个）的数据时，我认为它显示了我错误的index.item（在详细视图中）
#define API_V3_CHANNEL_URL @"examples.json"
@interface MSContestListViewController ()
@end
@implementation MSContestListViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
CGRect frame = CGRectMake(0.0, 0.0, self.view.frame.size.width, self.view.frame.size.height);
NSArray *colors = [[NSArray alloc] initWithObjects:
[UIColor colorWithRed:1 green:0.529 blue:0.357 alpha:1.0],
[UIColor colorWithRed:1 green:0.439 blue:0.357 alpha:1.0],
[UIColor colorWithRed:0.937 green:0.302 blue:0.357 alpha:1.0],
[UIColor colorWithRed:0.737 green:0.212 blue:0.357 alpha:1.0],
nil];
CAGradientLayer *gradient = [DREasyGradient gradientWithFrame:frame
orientation:DRHorizontalGradient
colors:colors];
[self.view.layer insertSublayer:gradient atIndex:0];
_segmentedControl.backgroundColor = [UIColor colorWithWhite:1.0 alpha:0.2];
[self fetchEntries];
[self fetchEntriesWinner];
[self fetchEntriesPhotos];
}
- (void)fetchEntries
{
NSString *searchURL = [API_V3_CHANNEL_URL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSData *searchData = [NSData dataWithContentsOfURL:[NSURL URLWithString:searchURL]];
NSDictionary *searchDict =[NSJSONSerialization JSONObjectWithData:searchData options:NSJSONReadingMutableContainers error:nil];
//self.readArray = [searchDict objectForKey:@"CONTESTS"];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"status == %@", @"LIVE"];
self.readArray = [[searchDict objectForKey:@"CONTESTS"] filteredArrayUsingPredicate:predicate];
NSLog(@"%@", self.readArray);
}
- (void)fetchEntriesWinner
{
NSString *searchURL = [API_V3_CHANNEL_URL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSData *searchData = [NSData dataWithContentsOfURL:[NSURL URLWithString:searchURL]];
NSDictionary *searchDict =[NSJSONSerialization JSONObjectWithData:searchData options:NSJSONReadingMutableContainers error:nil];
//self.readArray = [searchDict objectForKey:@"CONTESTS"];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"status == %@", @"ARCHIVED"];
self.readArrayWinner = [[searchDict objectForKey:@"CONTESTS"] filteredArrayUsingPredicate:predicate];
NSLog(@"winner array : %@", self.readArrayWinner);
}
- (void)fetchEntriesPhotos
{
NSString *searchURL = [API_V3_CHANNEL_URL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSData *searchData = [NSData dataWithContentsOfURL:[NSURL URLWithString:searchURL]];
NSDictionary *searchDict =[NSJSONSerialization JSONObjectWithData:searchData options:NSJSONReadingMutableContainers error:nil];
//self.readArray = [searchDict objectForKey:@"CONTESTS"];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"status == %@", @"LIVE"];
self.readArrayPhotos = [[searchDict objectForKey:@"CONTESTS"] filteredArrayUsingPredicate:predicate];
NSLog(@"%@", self.readArray);
}
- (IBAction)segmentedControlAction:(id)sender
{
switch(_segmentedControl.selectedSegmentIndex)
{
case 0:
if(self.readArray.count == 0)
{
[self fetchEntries];
} else {
[self.collectionView reloadData];
}
break;
case 1:
if(self.readArrayWinner.count == 0)
{
[self fetchEntriesWinner];
} else {
[self.collectionView reloadData];
}
break;
case 2:
if(self.readArrayPhotos.count == 0)
{
[self fetchEntriesPhotos];
} else {
[self.collectionView reloadData];
}
break;
default:
break;
}
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
switch (_segmentedControl.selectedSegmentIndex) {
case 0:
return [self.readArray count];
break;
case 1:
return [self.readArrayWinner count];
break;
case 2:
return [self.readArrayPhotos count];
break;
default:
break;
}
return 0;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"pictureCell";
MSContestListCollectionViewCell *cell = (MSContestListCollectionViewCell *)[self.collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];
cell.titleContest.adjustsFontSizeToFitWidth = YES;
cell.titleContest.minimumScaleFactor = 0.5;
cell.pictureImageView.layer.cornerRadius = 5;
cell.pictureImageView.clipsToBounds = YES;
cell.titleView.layer.cornerRadius = 5;
cell.titleView.clipsToBounds = YES;
switch (_segmentedControl.selectedSegmentIndex) {
case 0: {
NSDictionary *searchResult = [self.readArray objectAtIndex:indexPath.item];
NSString *stringImage = [searchResult objectForKey:@"featuredImage"];
NSString *image = [NSString stringWithFormat:@"https://srv.mediaswapp.com/%@", stringImage];
[cell.pictureImageView sd_setImageWithURL:[NSURL URLWithString:image]
placeholderImage:[UIImage imageNamed:@"placeholder.png"]];
cell.titleContest.text = [searchResult objectForKey:@"description"];
cell.statusContest.text = [searchResult objectForKey:@"status"];
break;
}
case 1: {
NSDictionary *searchResult2 = [self.readArrayWinner objectAtIndex:indexPath.item];
NSString *stringImage = [searchResult2 objectForKey:@"featuredImage"];
NSString *image = [NSString stringWithFormat:@"https://srv.mediaswapp.com/%@", stringImage];
[cell.pictureImageView sd_setImageWithURL:[NSURL URLWithString:image]
placeholderImage:[UIImage imageNamed:@"placeholder.png"]];
cell.titleContest.text = [searchResult2 objectForKey:@"description"];
cell.statusContest.text = [searchResult2 objectForKey:@"status"];
break;
}
case 2: {
NSDictionary *searchResult3 = [self.readArrayPhotos objectAtIndex:indexPath.item];
NSString *stringImage = [searchResult3 objectForKey:@"featuredImage"];
NSString *image = [NSString stringWithFormat:@"https://srv.mediaswapp.com/%@", stringImage];
[cell.pictureImageView sd_setImageWithURL:[NSURL URLWithString:image]
placeholderImage:[UIImage imageNamed:@"placeholder.png"]];
cell.titleContest.text = [searchResult3 objectForKey:@"description"];
cell.statusContest.text = [searchResult3 objectForKey:@"status"];
break;
}
default:
break;
}
return cell;
}
- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath
{
NSDictionary *searchResult = [self.readArray objectAtIndex:indexPath.item];
NSString *videoID = [searchResult objectForKey:@"description"];
NSString *stringImage = [searchResult objectForKey:@"featuredImage"];
NSString *image = [NSString stringWithFormat:@"https://srv.mediaswapp.com/%@", stringImage];
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"Main"
bundle: nil];
MSContestDetailViewController *yourController = (MSContestDetailViewController *)[mainStoryboard
instantiateViewControllerWithIdentifier:@"contestDetailViewController"];
yourController.urlImage = image;
yourController.contestName = videoID;
yourController.contestTime = [searchResult objectForKey:@"drawDate"];
[self.navigationController pushViewController:yourController animated:YES];
}
@end
答案 0 :(得分：3)
您应该使用didSelectItemAtIndexPath功能而不是didDeselectItemAtIndexPath：
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
NSDictionary *searchResult = [self.readArray objectAtIndex:indexPath.item];
NSString *videoID = [searchResult objectForKey:@"description"];
NSString *stringImage = [searchResult objectForKey:@"featuredImage"];
NSString *image = [NSString stringWithFormat:@"https://srv.mediaswapp.com/%@", stringImage];
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"Main"
bundle: nil];
MSContestDetailViewController *yourController = (MSContestDetailViewController *)[mainStoryboard
instantiateViewControllerWithIdentifier:@"contestDetailViewController"];
yourController.urlImage = image;
yourController.contestName = videoID;
yourController.contestTime = [searchResult objectForKey:@"drawDate"];
[self.navigationController pushViewController:yourController animated:YES];
}
否则，当您第一次触摸某个项目时，没有任何反应，因为取消选择了该项目。当您再单击第二个项目时，第二个项目会被选中，但第一个项目会被选中 de ，这将调用您当前的实现。但实际上您希望所有代码都发生在最初的选择而不是取消选择。