下午好，
我在具有TableViewController的工作，我有与DetailViewController问题的最后一步。
这里你可以找到我的代码Segue前：我有声明时的问题“[self.carMakes objectAtIndex：[myIndexPath行]”因为我收到的错误：“[__NSArrayM objectAtIndex：]：索引0超越界限空阵””和我已搜索错误，它的realated我的阵列，也就是空的。
我要后下更多的代码，如果可以帮助您找到在那里我做的事情错了，因为我不知道为什么数组是空的呢，因为它显示一切都在TableVlewController罚款。
CarTablewViewController.m
@implementation CarTableViewController
@synthesize carMakes = _carMakes;
@synthesize carModels = _carModels;
@synthesize carImages = _carImages;
//@synthesize jsonArray = _jsonArray;
- (void)viewDidLoad
{
[super viewDidLoad];
[self fetchJson];
[self.tableView reloadData];
}
- (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 [_jsonArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"carTableCell";
CarTableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[CarTableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellIdentifier];
}
cell.makeLabel.text = [[_jsonArray objectAtIndex:indexPath.row] valueForKey:@"id"];
cell.modelLabel.text = [[_jsonArray objectAtIndex:indexPath.row] valueForKey:@"user"];
NSURL * imageURL = [NSURL URLWithString:[[_jsonArray objectAtIndex:indexPath.row] valueForKey:@"imagen"]];
NSData * imageData = [NSData dataWithContentsOfURL:imageURL];
UIImage * carPhoto = [UIImage imageWithData:imageData];
cell.carImage.image = carPhoto;
return cell;
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"ShowCarDetails"])
{
CarDetailViewController *detailViewController = [segue destinationViewController];
NSIndexPath *myIndexPath = [self.tableView indexPathForSelectedRow];
NSLog(@"TEST");
detailViewController.carDetailModel = [[NSMutableArray alloc]
initWithObjects:
[self.carMakes objectAtIndex:[myIndexPath row]],
[self.carModels objectAtIndex:[myIndexPath row]],
[self.carImages objectAtIndex:[myIndexPath row]],
nil];
}
}
-(void)fetchJson {
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(queue, ^{
NSString * urlString = [NSString stringWithFormat:@"http://website.com/service.php"];
NSURL * url = [NSURL URLWithString:urlString];
NSData * data = [NSData dataWithContentsOfURL:url];
self.carModels = [[NSMutableArray alloc] init];
self.carMakes = [[NSMutableArray alloc] init];
self.carImages = [[NSMutableArray alloc] init];
@try
{
NSError *error;
[_jsonArray removeAllObjects];
_jsonArray = [NSJSONSerialization
JSONObjectWithData:data
options:NSJSONReadingMutableContainers|NSJSONReadingMutableLeaves
error:&error];
}
@catch (NSException * e)
{
NSLog(@"Exception: %@", e);
}
@finally
{
[self.tableView reloadData];
}
}
);
}
@end
提前致谢。
