Question

我迷失了塞格。我试图通过this tutorial来完成。

一切正常，但只有一行给我写错误，我不知道如何修复它。有错误的图片：

TableViewController.h

#import <UIKit/UIKit.h>
#import "Parse/Parse.h"
#import "CustomCell.h"
#import "DetailViewController.h"

@interface TableViewController : UITableViewController <UITableViewDelegate,UISearchDisplayDelegate, UISearchBarDelegate>  {

    NSArray *colorsArray;
    NSArray *searchResults;

}

@property (strong, nonatomic) IBOutlet UITableView *colorsTable;
@property (strong, nonatomic) IBOutlet UISearchBar *searchBar;
@property (strong, nonatomic) IBOutlet UISearchDisplayController *searchBarController;


@end

TableViewController.m

#import "TableViewController.h"
#import "CustomCell.h"
#import "DetailViewController.h"


@interface TableViewController (){
}



@end
@implementation TableViewController


@synthesize colorsTable;

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{    if ([segue.identifier isEqualToString:@"displayDetail"]){


        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
        PFObject *object = [self.objects objectAtIndex:indexPath.row];



        UINavigationController *nav = [segue destinationViewController];
        DetailViewController *detailViewController = (DetailViewController *) nav.topViewController;
        detailViewController.exam = object;
    }
}



- (void) retrieveFromParse {

    PFQuery *retrieveColors = [PFQuery queryWithClassName:@"Hracky1"];
    [retrieveColors findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error) {
            colorsArray= [[NSArray alloc] initWithArray:objects];
        }
        [colorsTable reloadData];

    }];
    [self.colorsTable reloadData];
    [self.refreshControl endRefreshing];
}

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}


- (void)viewDidLoad
{
    [super viewDidLoad];

    [self performSelector:@selector(retrieveFromParse)];

    UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];

    self.refreshControl = refreshControl;

    [refreshControl addTarget:self action:@selector(retrieveFromParse) forControlEvents:UIControlEventValueChanged];

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return colorsArray.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"colorsCell";

    CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    PFObject *tempObject = [colorsArray objectAtIndex:indexPath.row];;



     [cell.imageview setFile: [tempObject objectForKey:@"ImageURL"]];


    [cell.imageview loadInBackground];


    cell.cellTitle.text = [tempObject objectForKey:@"cellTitle"];
    cell.cellDescript.text = [tempObject objectForKey:@"cellDescript"];



    return cell;
}



@end

DetailedViewController.h

#import <UIKit/UIKit.h>
#import "Parse/Parse.h"

@interface DetailViewController : UIViewController <UITextViewDelegate>

@property (nonatomic, strong) PFObject *exam;
@property (nonatomic, strong) IBOutlet UITextView *descriptext;
@end

DetailViewcontrolled.m

#import "DetailViewController.h"
#import "Parse/Parse.h"
#import "TableViewController.h"

@interface DetailViewController ()

@end

@implementation DetailViewController


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];{

   self.descriptext.text = [self.exam objectForKey:@"TextView"];
    }

}




- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

Answer 1

从我从你的代码中读取的内容是因为你使用的是普通的UITableViewController。为了能够访问属性“self.objects”，你必须使用Parse的子类UITableViewController，称为“PFTableViewController”。他们包含了“对象”属性。

我可以推荐本教程来了解PFTableViewController

http://www.appcoda.com/ios-programming-app-backend-parse/

如果您希望它在没有PFTableView的情况下工作，您可以执行以下操作：我可以看到你有一个名为colorsArray的数组，并且你将Parse对象添加到该数组中。

所以不要这样做：

PFObject * object = [self.objects objectAtIndex：indexPath.row];

你可以这样做：

PFObject * object = [colorsArray objectAtIndex：indexPath.row];

我希望它适合你！

Answer 2

除了做本教程的另一个答案，也许你不应该通过PFObject本身......

找出并查询您要在详细视图控制器中显示的任何文本，在表视图控制器中检索它，然后只传递它（而不是整个PFObject）。

通过segue，PFObject崩溃Parse.com

2 个答案: