我正在关注这个关于如何运行 FQL 查询的漂亮教程（https://developers.facebook.com/docs/howtos/run-fql-queries-ios-sdk/），但不幸的是我遇到了一个意想不到的问题确定如何解决。我能够跟踪拉取数据并一直跟踪到第三步（在实现它之后，程序崩溃）我已经通过我的程序只是为了看看我是否犯了错误，但我没有看到任何错误。有人可以给我一个关于在这种情况下我需要如何修复插座的建议吗？谢谢你。
FriendViewController.h
#import <UIKit/UIKit.h>
@interface FriendViewController : UITableViewController
@property (strong, nonatomic) NSArray *data;
@end
FriendViewController.m
#import "FriendViewController.h"
@interface FriendViewController ()
@property (strong, nonatomic) UIToolbar *toolbar;
@end
@implementation FriendViewController
@synthesize data = _data;
@synthesize toolbar = _toolbar;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
// Add a toolbar to hold a Done button that will dismiss this view controller
self.toolbar = [[UIToolbar alloc] init];
self.toolbar.barStyle = UIBarStyleDefault;
[self.toolbar setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
[self.toolbar sizeToFit];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:self
action:@selector(doneButtonPressed:)];
UIBarButtonItem *space = [[UIBarButtonItem alloc]
initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:nil
action:nil];
self.toolbar.items = [NSArray arrayWithObjects:space, doneButton, nil];
[super viewDidLoad];
}
- (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 [self.data count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell =
[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = [[self.data objectAtIndex:indexPath.row]
objectForKey:@"name"];
UIImage *image = [UIImage imageWithData:
[NSData dataWithContentsOfURL:
[NSURL URLWithString:
[[self.data objectAtIndex:indexPath.row]
objectForKey:@"pic_square"]]]];
cell.imageView.image = image;
return cell;
}
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
[tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
}
}
*/
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
*/
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
return self.toolbar;
}
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
return self.toolbar.frame.size.height;
}
- (void)doneButtonPressed:(id)sender
{
// Dismiss view controller based on supported methods
if ([self respondsToSelector:@selector(presentingViewController)]) {
// iOS 5+ support
[[self presentingViewController] dismissModalViewControllerAnimated:YES];
} else {
[[self parentViewController] dismissModalViewControllerAnimated:YES];
}
}
@end