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我试图删除csv文件，同时删除单元格，但我发现了下一个错误，当我按下删除：UITableView - 如何删除文件时删除单元格？
Terminating app due to uncaught exception 'NSRangeException', reason: '* -[__NSArrayM objectAtIndex:]: index 3 beyond bounds [0 .. 2]' * First throw call stack:
代码：
//
/
/ CameraViewController.m
// oFiOSstoryboard
//
// Created by Dorald on 24/05/15.
//
//
#import "CameraViewController.h"
#import "resultsDetailView.h"
@interface CameraViewController()
@property (strong, nonatomic) IBOutlet UITableView *data;
@property (retain, nonatomic) IBOutlet UILabel *timeStamp;
@property (strong,nonatomic) NSMutableArray *dirList;
@property (nonatomic, assign) NSString *csvRow;
@property (nonatomic, strong) NSMutableArray *dataArray;
- (IBAction)didTapDeleteBtn:(id)sender;
@end
////////////////////////csv readder
NSMutableArray *tableDataArray;
NSString *bundleRoot = [[NSBundle mainBundle] bundlePath];
NSFileManager *manager = [NSFileManager defaultManager];
NSDirectoryEnumerator *direnum = [manager enumeratorAtPath:bundleRoot];
NSString *filename;
NSMutableArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *strPath = [[NSBundle mainBundle] pathForResource:@"file" ofType:@"csv"];
NSString *strFile = [NSString stringWithContentsOfFile:strPath encoding:NSUTF8StringEncoding error:nil];
NSMutableArray *timeStampb = [[NSMutableArray alloc] init]; ;
NSMutableArray *arrayToDelete = [[NSMutableArray alloc] init]; ;
NSMutableArray *filePathsArray ;
//NSMutableArray *dirList= [[NSMutableArray alloc] init]; ;
NSString *currentcsvfile;
NSString *csvfilenameSave;
@implementation CameraViewController
@synthesize data;
- (void)viewDidLoad {
[super viewDidLoad];
// ////lista de documentos
self.data.scrollEnabled = YES;
self.data.delegate = self;
self.data.dataSource = self;
//filePathsArray =[[NSMutableArray alloc] init]; ;
self.data.allowsMultipleSelectionDuringEditing = YES;
self.dataArray = [[NSMutableArray alloc]init];
NSInteger count = 100;
for (NSInteger i = count; i>=0; i--) {
NSString *title = [NSString stringWithFormat:@"cell %ld",i];
[self.dataArray addObject:title];
}
NSMutableArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSFileManager *manager = [NSFileManager defaultManager];
NSMutableArray* fileList = [manager contentsOfDirectoryAtPath:documentsDirectory error:nil];
//--- Listing file by name sort
NSLog(@"\n File list %@",fileList);
//---- Sorting files by extension
NSMutableArray *filePathsArray = [[NSFileManager defaultManager] subpathsOfDirectoryAtPath:documentsDirectory error:nil];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF EndsWith '.csv'"];
filePathsArray = [filePathsArray filteredArrayUsingPredicate:predicate];
NSLog(@"\n\n Sorted files by extension %@",filePathsArray);
self.dirList = [filePathsArray mutableCopy];
NSString *docPath =[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0];
if (!strFile) {
NSLog(@"Error reading file.");
}
[timeStampb release];
timeStampb = [[NSMutableArray alloc] initWithArray:[strFile componentsSeparatedByString:@"\,"]];
// this .csv file is seperated with new line character
// if .csv is seperated by comma use "," instesd of "\n"
for(NSString *countryname in timeStampb) {
NSLog(@"%@", timeStampb);
}
}
////////////////////////////////////////////////////////////////Delete csv files
//- (IBAction)delet:(id)sender {
// NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0];
//
// NSString *filePath = [docPath stringByAppendingPathComponent:@"jorge.csv"];
// NSError *error = nil;
// [[NSFileManager defaultManager] removeItemAtPath:filePath error:&error];
//}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
# pragma – mark table view DataSource Methods
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.dirList count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = @"SimpleTableItem";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier ];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
UIColor* color = [UIColor colorWithRed:(254.0/255.0) green:(251.0/255.0) blue:(248.0/255.0) alpha:1];
UIView *bgColorView = [[UIView alloc] init];
bgColorView.backgroundColor = [UIColor colorWithRed:(253.0/255.0) green:(0.0/255.0) blue:(237.0/255.0) alpha:1];
[cell setSelectedBackgroundView:bgColorView];
cell.backgroundColor = color;
}
cell.textLabel.text = [timeStampb objectAtIndex:indexPath.row];
cell.detailTextLabel.text = [self.dirList objectAtIndex:indexPath.row];
cell.textLabel.textColor = [UIColor colorWithRed:(0.0/255.0) green:(0.0/255.0) blue:(0.0/255.0) alpha:1];
cell.textLabel.font=[UIFont systemFontOfSize:8.0];
cell.detailTextLabel.font=[UIFont systemFontOfSize:15.0];
cell.detailTextLabel.textColor = [UIColor colorWithRed:(235.0/255.0) green:(120.0/255.0) blue:(33.0/255.0) alpha:1];
return cell;
}
-(UITableViewCell *)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"%d", indexPath.row);
currentcsvfile = [self.dirList objectAtIndex:indexPath.row ];;
csvfilenameSave = [NSString stringWithFormat:currentcsvfile];
NSArray *paths3 = NSSearchPathForDirectoriesInDomains
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory3 = [paths3 objectAtIndex:0];
//make a file name to write the data to using the documents directory:
NSString *fileName = [NSString stringWithFormat:@"%@/currentcsvnamefile.txt",
documentsDirectory3];
//create content - four lines of text
NSString *content =csvfilenameSave;
//save content to the documents directory
[content writeToFile:fileName
atomically:NO
encoding:NSStringEncodingConversionAllowLossy error:nil];
[_dirList addObject:_dirList[indexPath.row]];
NSLog(@"\n current csv csvfilenameSave % ",csvfilenameSave);
//[self performSegueWithIdentifier:@"detailsegue" sender:self];
}
- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Update the delete button's title based on how many items are selected.
[_dirList removeObject:_dirList[indexPath.row]];
}
-(UITableViewCellEditingStyle)data:(UITableView *)data editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
return UITableViewCellEditingStyleDelete;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle== UITableViewCellEditingStyleDelete) {
[self.data deleteRowsAtIndexPaths:[NSMutableArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[data setEditing:NO animated:YES];
NSString *docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0];
NSString *filePath = [docPath stringByAppendingPathComponent:[self.dirList objectAtIndex:indexPath.row ]];
NSError *error = nil;
[[NSFileManager defaultManager] removeItemAtPath:filePath error:&error];
[_dirList removeObjectAtIndex:indexPath.row];
}
}
#pragma mark - UITableView Delegate Methods
//- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
//{
// return UITableViewCellEditingStyleDelete;
//}
#pragma mark - Delete Button Action
#pragma mark – TableView delegate
- (void)dealloc {
[_timeStamp release];
[self.dirList release];
self.data.delegate = nil;
self.data.dataSource = nil;
[super dealloc];
}
@end
显示您的数组列表 - “self.dirList”。将下面这行代码移到方法末尾：'[_dirList removeObjectAtIndex：indexPath.row];' –
成功使用的方法是监视目录中的更改，并在目录中显示文件 - 独立于任何删除/重命名/创建操作。因此，当文件相关操作发生时，一旦文件系统中反映了更改，TableView就会被更新。 –
你为什么要从'didDeselectRowAtIndexPath'中的数组中移除对象？ – Lion