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在remove方法中，我的程序似乎一直很好，直到它退出並拋出一個超出界限的異常。它正確地從我的表視圖（tableView2）連接到的可變數組中刪除項目。我的表正確連接到委託和數據源。在reloadData行之後拋出異常。我有這種方法工作在一個不同的版本，我失去了一個操作系統重新安裝，但我認爲這是我以前的工作。任何建議將不勝感激！_tableView reloadData崩潰我的應用程序
錯誤：
2013-08-29 00:48:58.451 Event Sign-In[770:11303] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array'
*** First throw call stack:
(0x1c94012 0x10d1e7e 0x1c360b4 0x27a4 0xd08fb 0xd09cf 0xb91bb 0xc9b4b 0x662dd 0x10e56b0 0x2290fc0 0x228533c 0x2285150 0x22030bc 0x2204227 0x22048e2 0x1c5cafe 0x1c5ca3d 0x1c3a7c2 0x1c39f44 0x1c39e1b 0x1bee7e3 0x1bee668 0x15ffc 0x1cdd 0x1c05 0x1)
libc++abi.dylib: terminate called throwing an exception
(lldb)
.h:
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController <UITableViewDataSource, UITableViewDelegate>{
UITableView *tableView;
}
@property (weak, nonatomic) IBOutlet UITextField *nameField;
@property (nonatomic, retain) NSMutableArray *names;
@property (nonatomic, retain) NSMutableArray *existingNames;
@property (nonatomic, retain) NSMutableArray *companies;
@property (nonatomic, retain) NSMutableArray *namesAndCompanies;
- (IBAction)add:(id)sender;
- (IBAction)addExisting:(id)sender;
- (IBAction)Edit:(id)sender;
- (IBAction)Remove:(id)sender;
- (IBAction)submit:(id)sender;
- (IBAction)removeAll:(id)sender;
@property (strong, nonatomic) IBOutlet UITableView *tableView1;
@property (weak, nonatomic) IBOutlet UITableView *tableView2;
@property (strong, nonatomic) IBOutlet UITableView *companiesTable;
@end
.M：
#import "ViewController.h"
#import <MessageUI/MessageUI.h>
@interface ViewController() <MFMailComposeViewControllerDelegate>
@end
@implementation ViewController
@synthesize nameField;
@synthesize names;
@synthesize companies;
@synthesize existingNames;
@synthesize namesAndCompanies;
@synthesize tableView1 = _tableView1;
@synthesize tableView2 = _tableView2;
@synthesize companiesTable = _companiesTable;
int rowNumber1;
int rowNumber2;
int companyRowNumber;
- (void)viewDidLoad
{
[super viewDidLoad];
self.names = [[NSMutableArray alloc] init];
self.existingNames = [[NSMutableArray alloc] init];
self.namesAndCompanies = [[NSMutableArray alloc] init];
self.companies = [NSArray arrayWithObjects:@"Morgridge", @"WID", @"WARF", @"Other", nil];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.tableView1){
return [existingNames count];
}
else if (tableView == self.tableView2){
return [names count];
}
else if (tableView == self.companiesTable){
return [companies count];
}
return 0;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = @"SimpleTableItem";
UITableViewCell *cell;
if (tableView == self.tableView1){
cell = [_tableView1 dequeueReusableCellWithIdentifier:simpleTableIdentifier];
}
else if (tableView == self.tableView2){
cell = [_tableView2 dequeueReusableCellWithIdentifier:simpleTableIdentifier];
}
else if (tableView == self.companiesTable){
cell = [_companiesTable dequeueReusableCellWithIdentifier:simpleTableIdentifier];
}
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
if (tableView == self.tableView1){
cell.textLabel.text = [existingNames objectAtIndex:indexPath.row];
}
else if (tableView == self.tableView2){
cell.textLabel.text = [namesAndCompanies objectAtIndex:indexPath.row];
}
else if (tableView == self.companiesTable){
cell.textLabel.text = [companies objectAtIndex:indexPath.row];
}
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
if (tableView == self.tableView1){
rowNumber1 = indexPath.row;
}
else if (tableView == self.tableView2){
rowNumber2 = indexPath.row;
}
else if (tableView == self.companiesTable){
companyRowNumber = indexPath.row;
}
}
- (IBAction)add:(id)sender {
if ([nameField.text isEqualToString:@""]){
return;
}
BOOL exists = [names containsObject:nameField.text];
if(exists == FALSE){
NSMutableString *nameAndCompany = nameField.text;
[nameAndCompany appendString:@", "];
[nameAndCompany appendString:[companies objectAtIndex:companyRowNumber]];
[names addObject:nameField.text];
[namesAndCompanies addObject:nameAndCompany];
[existingNames addObject:nameAndCompany];
}
else{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"
message:@"A user with that name already exists."
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
[names sortUsingSelector:@selector(compare:)];
[namesAndCompanies sortUsingSelector:@selector(compare:)];
[existingNames sortUsingSelector:@selector(compare:)];
[_companiesTable deselectRowAtIndexPath:[_companiesTable indexPathForSelectedRow] animated:YES];
[self.view endEditing:YES];
[_tableView1 reloadData];
[_tableView2 reloadData];
[email protected]"";
}
- (IBAction)addExisting:(id)sender {
if ([existingNames containsObject:[namesAndCompanies objectAtIndex:rowNumber1]]){
return;
}
[existingNames addObject:[namesAndCompanies objectAtIndex:rowNumber1]];
[existingNames sortUsingSelector:@selector(compare:)];
[_tableView1 deselectRowAtIndexPath:[_tableView1 indexPathForSelectedRow] animated:YES];
[_tableView2 reloadData];
}
- (IBAction)Edit:(id)sender {
int toDelete = rowNumber1;
nameField.text = [names objectAtIndex:rowNumber1];
if ([namesAndCompanies containsObject:[existingNames objectAtIndex:rowNumber1]]){
[namesAndCompanies removeObjectIdenticalTo:[existingNames objectAtIndex:rowNumber1]];
}
[existingNames removeObjectAtIndex:toDelete];
[names removeObjectAtIndex:toDelete];
[_tableView1 deselectRowAtIndexPath:[_tableView1 indexPathForSelectedRow] animated:YES];
[_tableView1 reloadData];
[_tableView2 reloadData];
}
- (IBAction)Remove:(id)sender {
[namesAndCompanies removeObjectAtIndex:rowNumber2];
[_tableView2 reloadData];
}
- (IBAction)removeAll:(id)sender {
}
@end
我只知道你的數組是空的 –
是的...和reloadData應該看看該數組並相應地更新tableView。 –
在 - （NSInteger）tableView：（UITableView *）tableView numberOfRowsInSection：（NSInteger）部分檢查哪一個數組對應於哪個表視圖導致問題。 –