ios - 根据数组中的项目数量创建 View

我正在研究测验应用程序，我从api那里获得测验项目。现在，每个问题都包含一张图片和4个可能的答案。当前，我有两个附加到我的视图控制器的视图（前视图和后视图），当单击一个答案按钮时，它们分别变为另一个视图（我只以这种方式显示前两个问题）。

现在，每个api调用都会得到7个项目（每个项目1个图像和4个答案）。但是问题的数量可以随时更改，因此我试图实现一种自动执行视图创建过程的方法。

根据我的搜索，这是我能够想到的：

QuizMainViewController.h

#import <UIKit/UIKit.h>

@interface QuizMainViewController: UIViewController <UIScrollViewDelegate>

@property (nonatomic,retain)NSArray *results;
@property (nonatomic,assign)NSUInteger currentItemIndex;
@property(nonatomic,assign)NSUInteger  numberOfItemsIntheResultsArray;

QuizMainViewController.m

#import "QuizMainViewController.m"
#import "AppDelegate.h"
#import "Base64.h"
#import "Item.h"
#import "SVProgressHUD.h"
#import <UIKit/UIKit.h>

@interface QuizMainViewController ()

@property(nonatomic,strong)IBOutlet UIView *frontView;
@property (nonatomic,strong)IBOutlet UIView *BackView;

//first view outlets
@property (strong, nonatomic) IBOutlet UIImageView *frontViewImage;
@property (nonatomic,weak) IBOutlet UIButton *frontViewAnswer1;
@property (nonatomic,weak) IBOutlet UIButton *frontViewAnswer2;
@property (nonatomic,weak)IBOutlet UIButton *frontViewAnswer3;
@property (nonatomic,weak) IBOutlet UIButton *frontViewAnswer4;

//second view outlets
@property (strong, nonatomic) IBOutlet UIImageView *backViewImage;
@property(nonatomic,weak) IBOutlet UIButton *backViewAnswer1;
@property(nonatomic,weak) IBOutlet UIButton *backViewAnswer2;
@property(nonatomic,weak) IBOutlet UIButton *backViewAnswer3;
@property(nonatomic,weak) IBOutlet UIButton *backViewAnswer4;



@implementation QuizMainViewController

//the method that I am making the api call

-(void)loadQuizObjectsMethod
{
// this is the part I make the call and try to set the views based on if the items.count is odd or even.
operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *req, NSHTTPURLResponse *response, id jsonObject)
                 {
                     NSArray *array = [jsonObject objectForKey:@"Items"];
                     NSLog(@"Item array: %@",array);
                     NSMutableArray *tempArray = [[NSMutableArray alloc] init];
                     for (NSDictionary * itemDict in array) {
                         Item *myResponseItems = [[Item alloc] initWithDictionary:itemDict];
                         [tempArray addObject:myResponseItems];
                     }
                     _results = tempArray;
//this is where I need help with

                     Item *item = [_results objectAtIndex:_numberOfItemsIntheResultsArray];
                     for (_numberOfItemsIntheResultsArray in _results) {
                         if (_currentItemIndex %2 == 0) {
                          _currentItemIndex
                             //implement the front view
                         }else if (_currentItemIndex %2 == 1)
                         {
                             //implement the back view
                         }

                     }

我感谢您的帮助。

最佳答案

在这种情况下，您需要使用UIPageViewController类。首先创建一个名为QuestionViewController的类，如下所示

QuestionViewController.h

@property (strong, nonatomic) IBOutlet UIImageView *image;
@property (nonatomic,weak) IBOutlet UIButton *answer1;
@property (nonatomic,weak) IBOutlet UIButton *answer2;
@property (nonatomic,weak)IBOutlet UIButton *answer3;
@property (nonatomic,weak) IBOutlet UIButton *answer4;

@property (strong, nonatomic) Item *questionDetailsFromJSON;

QuestionViewController.m

-(void)viewDidLoad
{
   self.image = self.questionDetailsFromJSON.image
   //set all remaining outlets similar to this.
}

在情节提要或xib中，使用UIPageViewController将QuizMainViewController嵌入到UIContainer中。将QuizMainViewController设置为页面视图控制器的委托。

如下更改您的QuizMainViewController.m

@interface QuizMainViewController ()

@property(nonatomic,weak)IBOutlet UIPageViewController *pvc;

@implementation QuizMainViewController

//Implement all of the other methods

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
   int index = [self.results indexOfObject:[(QuestionViewController *)viewController    question]];
   index++;
   QuestionViewController *qvc = nil;
   if(index<self.results.count)
   {
     qvc = //Instantiate from story board or xib
     qvc.questionDetailsFromJSON = [self.results objectAtIndex:index];
   }
   return qvc;
}

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
   int index = [self.results indexOfObject:[(QuestionViewController *)viewController    question]];
   index--;
   QuestionViewController *qvc = nil;

   if(index>=0)
   {
     qvc = //Instantiate from story board or xib
     qvc.questionDetailsFromJSON = [self.results objectAtIndex:index];
   }

   return qvc;
}

请遵循此tutorial以获得更多详细信息。