Question

我正在创建一个简单的应用程序，将数据存储到sqlite数据库并从中检索数据。我能够存储数据，并且我还能够使用所有数据填充UITableView，在原型单元格中显示字段（名称）。我现在要做的就是打开一个视图，以显示所有细节。所以我确实设置了一个包含3个字段的viewController，但我不知道如何在该单元格之间传输数据到新视图。

这是我的代码：

#import "RootViewController.h"
#import "AppDelegate.h"
#import "Inserimento_Esame.h"
#import "Dettagli_Esame.h"

@interface RootViewController ()

@end

@implementation RootViewController

@synthesize nome,crediti,voto;

- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
    // Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];
NSString *docsDir;
NSArray *dirPaths;
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, 
YES);
docsDir = [dirPaths objectAtIndex:0];

databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: 
@"Esami.sqlite"]];
dataList = [[Data alloc] init:databasePath];

}

- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:   
(UIInterfaceOrientation)interfaceOrientation
{return YES;}

#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 [dataList getSize];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath 
*)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle   
reuseIdentifier:CellIdentifier];
}

NSDictionary *itemAtIndex = (NSDictionary *)[dataList objectAtIndex:indexPath.row];
cell.textLabel.textColor = [UIColor whiteColor];
cell.textLabel.text = [itemAtIndex objectForKey:@"nome"];
cell.detailTextLabel.textColor = [UIColor whiteColor];
cell.detailTextLabel.text = [itemAtIndex objectForKey:@"voto"];
return cell;
}


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath 
*)indexPath {

[self performSegueWithIdentifier:@"DETTAGLI" sender:indexPath]; 

}





- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"DETTAGLI"])  {
    NSLog(@"Dettagli");
    Dettagli_Esame *destination = [segue destinationViewController];
    NSIndexPath * myIndexPath = [self.tableView indexPathForSelectedRow];
    NSDictionary *itemAtIndex = (NSDictionary *)[dataList objectAtIndex:myIndexPath.row];
    destination.Dett = itemAtIndex;

 // I THINK I MUST PUT HERE MY MISSING CODE

}
}
@end


EDIT3

#import "Dettagli_Esame.h"

@interface Dettagli_Esame ()

@end

@implementation Dettagli_Esame
@synthesize nome;
@synthesize crediti;
@synthesize voto;
@synthesize Dett;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
}


- (void)viewDidLoad
{[super viewDidLoad];}

EDIT5-6:

-(void)viewDidAppear:(BOOL)animated{
NSString *docsDir;
NSArray *dirPaths;
NSLog(@"Dettagli Esame");

dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,   
YES);
docsDir = [dirPaths objectAtIndex:0];

databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: 
@"Esami.sqlite"]];
dataList = [[Data alloc] init:databasePath];
nome.text = [Dett objectForKey:@"nome"];
crediti.text = [Dett objectForKey:@"crediti"];
voto.text = [Dett objectForKey:@"voto"];
NSLog(@"Dettagli Esame: %@", self.Dett);
}

Answer 1

你似乎走在了正确的轨道上。 destination所需的信息与您用于填充单元格的信息相同（实际上，您说3个字段，但我会假设它们都在同一个字典中），所以：

NSDictionary *itemAtIndex = (NSDictionary *)[dataList objectAtIndex:myIndexPath.row];

然后你需要在NSDictionary类中创建一个Dettagli_Esame属性并分配它，例如：

destination.displayDictionary = itemAtIndex;

这些行会指向“缺少代码”的位置。

推送Uiview并填充数据

1 个答案: