本文介绍了如何将选定单元格的详细信息发送到另一个视图控制器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个在tableview中加载的sqlite3数据库。我还有一个正常工作的搜索功能。我想每当我选择一个单元格时，我将被重定向到视图控制器详细信息，并在其中打印有关所选项目的详细信息。
我试图用indexpath.row跟踪所选项目，但每当我执行搜索时，通常，indexpath.row将自动更改。
因此我陷入困境，如何将所选行中的唯一变量传递给细节VC。我真的希望有人会花时间阅读代码，因为同样的错误，我已经被困了近2个星期。
tableView被分配给类：AuthorVC
详细视图被分配给类：详细信息
Details.m ：
I have an sqlite3 database that is loaded inside a tableview. I have also a search feature that is working correctly. I want whenever i select a cell, i will be redirected to the view controller "Details", and printing inside it the details concerning the item selected.I have tried to trace the selected item with indexpath.row, but whenever i perform a search, normally, the indexpath.row will automatically change.So therefore i am stuck , how to pass a unique variable from the selected row to the details VC. i really hope someone will take the time and read the code, i have been jammed for almost 2 weeks on the same error.The tableView is assigned to the class : AuthorVCThe detail View is assigned to the class : Details
Details.m :
//
// Details.m
// AuthorsApp
//
// Created by georges ouyoun on 7/17/12.
// Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//
#import "Details.h"
#import "Author.h"
#import "AuthorVC.h"
#import <sqlite3.h>
@interface Details ()
@end
@implementation Details
@synthesize Favo;
@synthesize labelText;
@synthesize selectedAuthors;
@synthesize author , infoRequest;
BOOL PAss = NO;
BOOL SElected2 = NO;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// authorNAme = author.genre;
// self.labelText.text =authorNAme;
// Do any additional setup after loading the view.
// self.labelText.text = @"nlsdjhfl";//*[self.author.genre description];*/
// NSLog(author.genre);
/* This is where the label text APPearsssssssss */
NSLog(@"Everything is ok now !");
// NSLog(authorNAme);
}
- (void)viewDidUnload
{
// [self setLabelText:nil];
NSLog(@"U have entered view did unload");
[AddBut release];
AddBut = nil;
[super viewDidUnload];
[self setLabelText:Nil];
[authorNAme release];
// Release any retained subviews of the main view.
}
/*
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if ([segue.identifier isEqualToString:@"AuthorsCell"]) {
[segue.destinationViewController setLabelText:author.title];
}
}
*/
-(void)viewWillAppear:(BOOL)animated
{
//labelText.text = authorNAme;
NSLog(@"U have entered the viewWillAppear tag");
// detailsLabel.text = food.description;
//authorNAme=Nil;
//[self setauthorName:Nil];
}
/*
-(void) viewDidAppear:(BOOL)animated{
labelText.text = @"This is the DidAppearTag";
NSLog(@"U have entered the viewDidAppear tag");
}
*/
-(void) viewWillDisappear:(BOOL)animated{
NSLog(@"This is the view will disappear tag");
//authorNAme.release;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
- (void)dealloc {
[labelText release];
[AddBut release];
[super dealloc];
}
- (IBAction)AddButClick:(UIButton *)sender {
[AddBut setImage:[UIImage imageNamed:@"apple-logo copy.png"] forState:UIControlStateSelected];
[AddBut setImage:[UIImage imageNamed:@"apple-logo copy.png"] forState:UIControlStateHighlighted];
Favo = [[NSMutableArray alloc] initWithCapacity:1000000];
NSLog(authorNAme);
@try {
NSFileManager *fileMgr = [NSFileManager defaultManager];
// NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"dictionary.sqlite"];
//NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"authorsDb2.sqlite"];
// NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"FinalDb.sqlite"];
//NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"xxJuridique-FINAL-OK.sqlite"];
NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"data.sqlite"];
BOOL success = [fileMgr fileExistsAtPath:dbPath];
if(!success)
{
NSLog(@"Cannot locate database file '%@'.", dbPath);
}
if(!(sqlite3_open([dbPath UTF8String], &db) == SQLITE_OK))
{
NSLog(@"An error has occured: %@", sqlite3_errmsg(db));
}
// const char *sql = "SELECT F_Keyword FROM wordss";
const char *sql = "SELECT * FROM Sheet1";
NSLog(@"Successfully selected from database");
sqlite3_stmt *sqlStatement;
if(sqlite3_prepare(db, sql, -1, &sqlStatement, NULL) != SQLITE_OK)
{
NSLog(@"Problem with prepare statement: %@", sqlite3_errmsg(db));
}else{
NSLog(@"Got in the else tag");
while (sqlite3_step(sqlStatement)==SQLITE_ROW /*&& PAss == NO*/) {
NSLog(@"Got in the while tag");
Author * author = [[Author alloc] init];
NSLog(@"Author initialized");
author.name = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,10)];
NSLog(@"Initialization ok");
// NSLog(author.name);
if(/*author.name == @"NO" &&*/ HighLighted == NO){
//const char *sql2 = "INSERT INTO Sheet1 ";
[AddBut setImage:[UIImage imageNamed:@"apple-logo copy.png"] forState:UIControlStateNormal];
NSLog(@"We have not selected it as fav yet");
// [AddBut setSelected:NO]; //btn changes to normal state
NSLog(@"The button was NOt highlighted and now is");
HighLighted = YES;
// PAss = YES;
// [self release];
break;
}
else
{
NSLog(@"We have selected it as fav");
[AddBut setImage:[UIImage imageNamed:@"apple-logo.png"] forState:UIControlStateNormal];
[AddBut setSelected:NO]; //btn changes to normal state
NSLog(@"The button was highlighted and now is NOt");
HighLighted = NO;
break;
// [self viewDidLoad];
// PAss = YES;
}
// [Favo release];
// NSLog(Favo);
// author.name = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,2)];
// author.title = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,2)];
// author.genre = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement, 4)];
// [theauthors addObject:author];
}
}
}
@catch (NSException *exception) {
NSLog(@"Problem with prepare statement: %@", sqlite3_errmsg(db));
}
@finally {
// sqlite3_finalize(sqlStatement);
sqlite3_close(db);
return Favo;
}
// [AddBut setSelected:YES];
// if(SElected == YES){
// NSLog(@"The button was highlighted and now not");
//
// [AddBut setImage:[UIImage imageNamed:@"apple-logo.png"] forState:UIControlStateNormal];
// [AddBut setSelected:NO]; //btn changes to highlighted åstate
// SElected = NO;
//
// }
//
// else{
//
// [AddBut setSelected:YES]; //btn changes to normal state
// NSLog(@"The button was NOt highlighted and now is");
// SElected = YES;
//
// }
}
@end
AuthorVC.m ：
#import "AuthorVC.h"
#import "Author.h"
#import <sqlite3.h>
#import "SearchVC.h"
//#import "DetailViewController.h"
#import "Details.h"
@implementation AuthorVC
@synthesize theauthors;
@synthesize author;
NSString *authorNAme;
- (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
{ searchBar.delegate = (id)self;
[self authorList];
[super viewDidLoad];
}
- (void)viewDidUnload
{
[searchBar release];
searchBar = nil;
[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);
}
-(void)searchBar:(UISearchBar*)searchBar textDidChange:(NSString*)text
{
if(text.length == 0)
{
isFiltered = FALSE;
}
else
{
isFiltered = true;
filteredTableData = [[NSMutableArray alloc] init];
for (Author* author in theauthors)
{ //[NSPredicate predicateWithFormat:@"SELECT * from books where title LIKE %@", searchBar.text];
NSRange nameRange = [author.name rangeOfString:text options:NSAnchoredSearch];
NSRange descriptionRange = [author.genre rangeOfString:text options:NSAnchoredSearch];
if(nameRange.location != NSNotFound || descriptionRange.location != NSNotFound)
{
[filteredTableData addObject:author];
}
}
}
[self.tableView 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
{
int rowCount;
if(self->isFiltered)
rowCount = filteredTableData.count;
else
rowCount = theauthors.count;
return rowCount;
// Return the number of rows in the section.
//return [self.theauthors count];
}
/*
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
// NSString *Title;
// Author *auth = (Author*)segue.destinationViewController;
Details *dv = (Details*)segue.destinationViewController;
dv.labelText.text = author.title;
NSLog(@"Did Enter prepareForSegue");
// labelText.text = @"Hy";
}
*/
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"AuthorsCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
int rowCount = indexPath.row;
Author *author = [self.theauthors objectAtIndex:rowCount];
//(NSIndexPath * ) indexPathForSelectedRow;
//authorNAme =;
if(isFiltered){
author = [filteredTableData objectAtIndex:indexPath.row];
// authorNAme = author.genre;
// NSLog(author.genre);
}
else{
author = [theauthors objectAtIndex:indexPath.row];
// authorNAme = author.genre;
// NSLog(author.genre);
}
cell.textLabel.text = author.name;
cell.detailTextLabel.text = author.genre;
//NSString *titleString = [[[NSString alloc] initWithFormat:@"Element number : %d",author.name] autorelease];
return cell;
}
-(NSMutableArray *) authorList{
theauthors = [[NSMutableArray alloc] initWithCapacity:1000000];
NSMutableArray * new2 = [[NSMutableArray alloc ] initWithCapacity:100000];
// authorNAme = theauthors.sortedArrayHint.description;
@try {
NSFileManager *fileMgr = [NSFileManager defaultManager];
// NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"dictionary.sqlite"];
//NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"authorsDb2.sqlite"];
// NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"FinalDb.sqlite"];
//NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"xxJuridique-FINAL-OK.sqlite"];
NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"data.sqlite"];
BOOL success = [fileMgr fileExistsAtPath:dbPath];
if(!success)
{
NSLog(@"Cannot locate database file '%@'.", dbPath);
}
if(!(sqlite3_open([dbPath UTF8String], &db) == SQLITE_OK))
{
NSLog(@"An error has occured: %@", sqlite3_errmsg(db));
}
// const char *sql = "SELECT F_Keyword FROM wordss";
const char *sql = "SELECT * FROM Sheet1";
sqlite3_stmt *sqlStatement;
if(sqlite3_prepare(db, sql, -1, &sqlStatement, NULL) != SQLITE_OK)
{
NSLog(@"Problem with prepare statement: %@", sqlite3_errmsg(db));
}else{
while (sqlite3_step(sqlStatement)==SQLITE_ROW) {
Author * author = [[Author alloc] init];
//NSString *authorName = author.name;
author.name = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,2)];
author.title = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement,4)];
author.genre = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement, 4)];
new2 = author.genre;
authorNAme=author.genre;
//NSLog(author.genre);
[theauthors addObject:author];
}
// authorNAme = author.genre;
}
}
@catch (NSException *exception) {
NSLog(@"Problem with prepare statement: %@", sqlite3_errmsg(db));
}
@finally {
// sqlite3_finalize(sqlStatement);.
// authorNAme = nil;
sqlite3_close(db);
// authorNAme = Nil;
return theauthors;
}
}
- (void)dealloc {
[searchBar release];
[super dealloc];
//[authorNAme release];
}
//- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
//
// /*
// When a row is selected, the segue creates the detail view controller as the destination.
// Set the detail view controller's detail item to the item associated with the selected row.
// */
// if ([[segue identifier] isEqualToString:@"ShowSelectedPlay"]) {
//
// NSIndexPath *selectedRowIndex = [self.tableView indexPathForSelectedRow];
// Details *detailViewController = [segue destinationViewController];
// detailViewController.author = [dataController objectInListAtIndex:selectedRowIndex.row];
// }
//}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
//Get the selected country
NSString *selectedAuthors = [theauthors objectAtIndex:indexPath.row];
//NSLog(selectedAuthors);
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
Details *dvController = [storyboard instantiateViewControllerWithIdentifier:@"Details"]; //Or whatever identifier you have defined in your storyboard
//authorNAme = selectedAuthors.description;
//Initialize the detail view controller and display it.
//Details *dvController = [[Details alloc] init/*WithNibName:@"Details" bundle:nil*/];
dvController.selectedAuthors = selectedAuthors;
// NSString *elem = [new2 objectAtIndex:0];
//NSLog(dvController.labelText.text);
// NSString *titleString = [[[NSString alloc] initWithFormat:@"Author title : %d",indexPath.row] autorelease];
// NSString *titleString2 = [[new2 objectAtIndex:indexPath.row] autorelease];
// NSLog(@"this is the selected row , %s",titleString2);
// authorNAme = titleString;
/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! BReak point of SQL Query!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
/*
@try {
NSFileManager *fileMgr2 = [NSFileManager defaultManager];
// NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"dictionary.sqlite"];
//NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"authorsDb2.sqlite"];
// NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"FinalDb.sqlite"];
//NSString *dbPath = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"xxJuridique-FINAL-OK.sqlite"];
NSString *dbPath2 = [[[NSBundle mainBundle] resourcePath ]stringByAppendingPathComponent:@"data.sqlite"];
BOOL success = [fileMgr2 fileExistsAtPath:dbPath2];
if(!success)
{
NSLog(@"Cannot locate database file '%@'.", dbPath2);
}
if(!(sqlite3_open([dbPath2 UTF8String], &db) == SQLITE_OK))
{
NSLog(@"An error has occured: %@", sqlite3_errmsg(db));
}
NSLog(@"access to the second DB is ok");
// const char *sql = "SELECT F_Keyword FROM wordss";
const char *sql2 = "SELECT field7 FROM Sheet1 WHERE field1 = 'titleString' ";
//NSLog(sql2);
sqlite3_stmt *sqlStatement2;
if(sqlite3_prepare(db, sql2, -1, &sqlStatement2, NULL) != SQLITE_OK)
{ NSLog(@"Problem with prepare the db");
NSLog(@"Problem with prepare statement: %@", sqlite3_errmsg(db));
}else{
// while (sqlite3_step(sqlStatement2)==SQLITE_ACCESS_EXISTS) {
NSLog(@"Starting to prepare the result");
Author * author2 = [[Author alloc] init];
NSLog(@"Author 2 created");
author2.genre2 = [NSString stringWithUTF8String:(char *) sqlite3_column_text(sqlStatement2, 7 )];
NSLog(@"Initialistion of author 2 is ok");
// NSLog(author2.genre);
// authorNAme = author2.genre;
[theauthors addObject:author2];
// }
}
}
@catch (NSException *exception) {
NSLog(@"Problem with prepare statement: %@", sqlite3_errmsg(db));
}
@finally {
// sqlite3_finalize(sqlStatement);.
// authorNAme = nil;
sqlite3_close(db);
// authorNAme = Nil;
return theauthors;
}
*/
UIAlertView *messageAlert = [[UIAlertView alloc]
initWithTitle:@"Row Selected" message:authorNAme delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[messageAlert show];
[self.navigationController pushViewController:dvController animated:YES];
}
- (UITableViewCellAccessoryType)tableView:(UITableView *)tableView accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath {
//return UITableViewCellAccessoryDetailDisclosureButton;
return UITableViewCellAccessoryDisclosureIndicator;
}
- (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath {
[self tableView:tableView didSelectRowAtIndexPath:indexPath];
}
/*
-(void) showDetailsForIndexPath:(NSIndexPath*)indexPath
{
[self->searchBar resignFirstResponder];
DetailViewController* vc = [self.storyboard instantiateViewControllerWithIdentifier:@"DetailsViewController"];
AuthorVC* author;
if(isFiltered)
{
author = [filteredTableData objectAtIndex:indexPath.row];
}
else
{
author = [theauthors objectAtIndex:indexPath.row];
}
vc.author = author;
[self.navigationController pushViewController:vc animated:true];
}
*/
@end
推荐答案
只需使用作者属性细节视图控制器。你需要在你的 showDetailsForIndexPath中的 tableView：didSelectRowAtIndexPath：中传递它：
Just use an Author property in your details view controller. You need to pass it in the tableView:didSelectRowAtIndexPath: like this in your showDetailsForIndexPath:
if(isFiltered)
{
author = [filteredTableData objectAtIndex:indexPath.row];
}
else
{
author = [theauthors objectAtIndex:indexPath.row];
}
vc.author = author;
[self.navigationController pushViewController:vc animated:true];
这篇关于如何将选定单元格的详细信息发送到另一个视图控制器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！