我在
Cateogry_Cell * cell = (Cateogry_Cell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
并发现它总是返回 nil，我不知道为什么它会通过
if(cell == nil) {
cell = [[Cateogry_Cell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cateogry_Cell"];
}
要么他们是我看不到的问题，要么我在 nil 部分的代码是错误的，但无论如何我都不是 100% 的。
我正在使用 Storyboard，所以我在其中创建了 Cell 并设置了样式，而不是通过代码。
#import "Category_TableView.h"
#import "Cateogry_Cell.h"
#import "JobList_Table.h"
#import "JobList_Cell.h"
#import <QuartzCore/QuartzCore.h>
@interface Category_TableView ()
@end
@implementation Category_TableView
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationController.navigationBar.hidden = YES;
// Do any additional setup after loading the view.
[self.Category_Table registerClass:[Cateogry_Cell class] forCellReuseIdentifier:@"Cateogry_Cell"];
NSString *requestURL = [NSString stringWithFormat:@"http://URL.4fx.co.uk/forms/AppForms/app_latest.ashx"];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString: requestURL]];
NSURLConnection *con =[[NSURLConnection alloc] initWithRequest:request delegate:self];
if(con)
{
self.CatData = [[NSMutableData alloc] init];
self.Category_Array = [[NSMutableArray alloc] init];
}
else
{
[[[UIAlertView alloc] initWithTitle:@"Error" message:@"Failed to get connection. Please try again later" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil] show];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[self.CatData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[self.CatData appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
[[[UIAlertView alloc] initWithTitle:@"Error" message:@"Failed to get connection. Please try again later" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil] show];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSString *temp = [[NSString alloc] initWithData:self.CatData encoding:NSUTF8StringEncoding];
NSArray *jobs = [temp componentsSeparatedByString:@"||||"];
NSMutableDictionary *temp_dict = [[NSMutableDictionary alloc] init];
NSArray *jobInfo = [[NSArray alloc] init];
int count = 0;
for(int i = 1; i < [jobs count]; i++)
{
jobInfo = [[jobs objectAtIndex:i] componentsSeparatedByString:@"||"];
@try {
temp_dict = [[NSMutableDictionary alloc]init];
[temp_dict setObject:[jobInfo objectAtIndex:0] forKey:@"Category"];
[self.Category_Array addObject:temp_dict];
// NSDictionary *tempfile = [self.Category_Array objectAtIndex:i - 1];
// [[[UIAlertView alloc] initWithTitle:@"Added to Cat" message:[tempfile objectForKey:@"Category"] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil] show];
count++;
}
@catch (NSException *exception) {
[[[UIAlertView alloc] initWithTitle:@"Exception Thrown" message:exception.reason delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil] show];
}
}
[_Category_Table reloadData];
}
//#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.Category_Array count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = @"Cateogry_Cell";
Cateogry_Cell * cell = (Cateogry_Cell *)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if(cell == nil) {
cell = [[Cateogry_Cell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}
NSDictionary *temp = [self.Category_Array objectAtIndex:[indexPath row]];
cell.Category_Cell_Label.text = [temp objectForKey:@"Category"];
//[[[UIAlertView alloc] initWithTitle:@"In Table Function" message:[temp objectForKey:@"Category"] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil] show];
return cell;
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"Cat_Cell_Push"])
{
JobList_Table *DetailController = [segue destinationViewController];
NSIndexPath *MyIndexPath = [_Category_Table indexPathForSelectedRow];
int row = [MyIndexPath row];
DetailController.JobList_Array = @[_Category_Array[row]];
}
}
@end