친구 목록에 파일 목록이 있습니다. UITableViewNavigation을 이해하려고합니다. 파일에서 목록을로드하지만 셀을 선택하면 해당 시점의 데이터 배열이 비어있는 것 같아서 왜 작동하지 않을 수 있습니다. 43 :이 방법에서
은이 오류를
UITableView 셀을 선택할 때 NSArray가 비어있는 이유는 무엇입니까?
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
FriendsNameViewController *newView =[[FriendsNameViewController alloc] initWithNibName:@"FriendsNameViewController" bundle:nil];
[self.navigationController pushViewController:newView animated:YES];
//Crashes here
NSString *temp = [dataArray objectAtIndex:indexPath.row];
NSLog(@"%@",temp);
[[newView labelx] setText:[NSString stringWithFormat: @"%@" ,temp]];
}
2011-10-03 14 얻을 08.411 navman2 [69,691 : B303] 앱 종단 * 인해 캐치되지 않는 예외 ' NSRangeException ', 이유 :'* - [NSMutableArray objectAtIndex :] : 빈 배열의 범위를 벗어나는 인덱스 2 '
여기
#import "TableViewController.h"
#import "FriendsNameViewController.h"
@implementation TableViewController
@synthesize dataArray;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (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 - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"myfriendsList" ofType:@"txt"];
NSStringEncoding encoding;
NSError* error;
NSString* fh = [NSString stringWithContentsOfFile:filePath usedEncoding:&encoding error:&error];
dataArray = [NSArray alloc];
dataArray = [fh componentsSeparatedByString:@"\n"];
}
- (void)viewDidUnload
{
[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);
}
#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 [dataArray 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] autorelease];
}
// Configure the cell...
cell.textLabel.text = [dataArray objectAtIndex:indexPath.row];
return cell;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
FriendsNameViewController *newView =[[FriendsNameViewController alloc] initWithNibName:@"FriendsNameViewController" bundle:nil];
[self.navigationController pushViewController:newView animated:YES];
//Crashes here
NSString *temp = [dataArray objectAtIndex:indexPath.row];
NSLog(@"%@",temp);
[[newView labelx] setText:[NSString stringWithFormat: @"%@" ,temp]];
}
@end
'viewDidunload'의 코드를'self.dataArray = [NSMutableArray alloc];' 'self.dataArray = [fh componentsSeparatedByString : @ "\ n"];'수정했지만 차이는 없습니다. Autorelease와 관련이 있다는 것을 알고 있지만 자기가 어떤 차이가 있는지 알고 있습니다. –