@implementation StudyViewController
- (void)viewDidLoad {
[super viewDidLoad];
//[super viewWillAppear:animated];
... 基本上我通过afnetworking接收响应对象。 然后将数据存储在名为arData
的全局定义的可移动数组中 ............
...........
[manager POST:studysearchUrl parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
[MBProgressHUD hideHUDForView:self.view animated:YES];
NSLog(@"%@",responseObject);
[Global sharedGlobal].arrData = responseObject;
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
[MBProgressHUD hideHUDForView:self.view animated:YES];
NSLog(@"Error: %@", error);
}];
}
#pragma collection view methods
- (NSInteger) numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}
-(NSInteger) collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return [[[Global sharedGlobal]arrData] count];
}
-(UICollectionView *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"StudyCell" forIndexPath:indexPath];
然后,在创建图像路径时,将nsmutable对象索引存储为要访问的字典。 我需要从这个nsmutable数组中提取3组数据(firstUID,second,third),这些数据将被传递给NSURL以构建图像url路径,如下所示。 其余参数(hyperText,UrlKey,portNumber,seperator)通过nsdictionary传递(此处未显示)。
UIImageView *img = (UIImageView *)[cell viewWithTag:1000];
NSDictionary *dictionary = [Global sharedGlobal].arrData[indexPath.row];
img.imageURL = [NSURL URLWithString:[NSString stringWithFormat:@"%@%@%@%@?parametersintheWebServer&firstID=%@&secondID=%@&thirdID=%@",hyperText, UrlKey, portNumber, seperator, [Global sharedGlobal].arrData[indexPath.row] [@"firstUID"],[Global sharedGlobal].arrData[indexPath.row][@"secondUID"],[Global sharedGlobal].arrData[indexPath.row][@"thirdUID"]]];
return cell;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
1-我似乎无法在控制台内部获取NSLOG输出
-(UICollectionView *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
2-即使我知道从Web服务收到的参数是正确的,我也无法显示任何图像(&我可以在viewdidload时对它们进行NSLOG而没有任何问题。
任何帮助将不胜感激。
谢谢。
答案 0 :(得分:1)
您首先应该看到对numberOfItemsInSection
的来电。如果你可以在那里设置一个断点(或NSLog)并且[[[Global sharedGlobal]arrData] count]
的查看次数不大于0,那么这可能有助于解决问题。如果它没有按下该委托回叫,则可能没有为集合视图正确设置委托。