Question

我已按照此Parse Tutorial创建自定义UITableViewController。我希望能够在故事板中编辑UITableView。我想在本教程的某处我将ViewController链接到TableView，但我没有。如何在链接到此ViewController进行UI编辑的stroyboard中访问此TableView？

这是GitHub上的ViewController code。

编辑：这实际上与Parse API无关。 tableview不在故事板中 - 这是我想要解决的问题。教程指示我将其添加到AppDelegate.m：

MyTableViewController *controller = [[MyTableViewController alloc] init];

self.window.rootViewController = controller;

这是MyTableViewController.m：

- (id)initWithStyle:(UITableViewStyle)style

{

self = [super initWithStyle:style];

if (self) {

    // Custom the table

    // The className to query on

    self.className = @"Artists"; 

    // The key of the PFObject to display in the label of the default cell style

    self.keyToDisplay = @"artistName"; 

    // Whether the built-in pull-to-refresh is enabled

    self.pullToRefreshEnabled = YES;


    // Whether the built-in pagination is enabled

    self.paginationEnabled = YES;


    // The number of objects to show per page

    self.objectsPerPage = 50;

 }

return self;

}

该应用程序运行正常，但我在故事板中的所有内容都是空白视图。我是否需要创建TableView并将其链接到MyTableViewController？我猜我必须从AppDelegate中删除那个self.window ...代码。

编辑：更新代码：

#import "MyTableViewController.h"

@implementation MyTableViewController
@synthesize tableView = _tableView;


#pragma mark - View lifecycle

- (void)viewDidLoad
{
[super viewDidLoad];


    // Custom the table

    // The className to query on
    self.className = @"Artists";

    // The key of the PFObject to display in the label of the default cell style
    self.keyToDisplay = @"artistName";

    // Whether the built-in pull-to-refresh is enabled
    self.pullToRefreshEnabled = YES;

    // Whether the built-in pagination is enabled
    self.paginationEnabled = YES;

    // The number of objects to show per page
    self.objectsPerPage = 50;




// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;

// Uncomment the following line to display an Edit button in the navigation bar for this     view controller.
 self.navigationItem.rightBarButtonItem = self.editButtonItem;
}

- (void)viewDidUnload
{
[self setTableView:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}

- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
}

- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:            (UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];

// Release any cached data, images, etc that aren't in use.
}

#pragma mark - Parse

- (void)objectsDidLoad:(NSError *)error {
[super objectsDidLoad:error];

// This method is called every time objects are loaded from Parse via the PFQuery
}

- (void)objectsWillLoad {
[super objectsWillLoad];

// This method is called before a PFQuery is fired to get more objects
}


// Override to customize what kind of query to perform on the class. The default is to query for
// all objects ordered by createdAt descending.
- (PFQuery *)queryForTable {
PFQuery *query = [PFQuery queryWithClassName:self.className];

// If no objects are loaded in memory, we look to the cache first to fill the table
// and then subsequently do a query against the network.
if ([self.objects count] == 0) {
    // ** There are other caching options in Parse iOS guide
    query.cachePolicy = kPFCachePolicyNetworkElseCache;
}

[query orderByDescending:@"tweetInfluence"];

return query;
}
// Override to customize the look of a cell representing an object. The default is to display
// a UITableViewCellStyleDefault style cell with the label being the first key in the object. 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object {
static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}

// Configure the cell
cell.textLabel.text = [object objectForKey:@"artistName"];
cell.detailTextLabel.text = [NSString stringWithFormat:@"Tweet Influence: %@", [object objectForKey:@"tweetInfluence"]];

return cell;
}
#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[super tableView:tableView didSelectRowAtIndexPath:indexPath];
}


@end

Answer 1

如果您使用的是故事板，则应删除

MyTableViewController *controller = [[MyTableViewController alloc] init];

self.window.rootViewController = controller;

来自AppDelegate。通过故事板，应用程序的入口点在故事板本身上进行控制，由右向箭头表示。

此外，正如代码现在所示，您的应用正在调用视图控制器上的init函数，而不是initWithStyle函数。您应该将当前位于initWithStyle的代码放在视图控制器的viewDidLoad函数中，以确保它将被调用。

在故事板中编辑UITableViewController UITableView

1 个答案: