详细视图按钮打开另一个详细视图根据sqlite db

Question

我有一个sqlite数据库，我用它填充表视图。每个单元都会相应地打开详细视图。在这个细节视图中，我有一些按钮需要打开其他细节视图（一个是图像视图，一个是地图视图，一个是下载PDF文件的视图），但所有这些都必须根据表视图行显示内容首先选择。 我该怎么做？ 感谢名单

TableVC.m

#import "TableVC.h" 
#import "DetailPointsVC.h" 

@interface TableVC() 

@end 

@implementation TableVC { 
NSMutableArray *listOfTitle; 
NSMutableArray *listOfImages; 
} 

@synthesize sendDataTable; 

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 
[self initDatabase]; 
[self getPoints]; 
} 

#pragma mark - View lifecycle 

-(void)initDatabase{ 
BOOL success; 
NSFileManager *fileManager = [NSFileManager defaultManager]; 
NSError *error; 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:@"mydb.sqlite"]; 
success = [fileManager fileExistsAtPath:writableDBPath]; 
if (success) 
{ 
    return; 
} 
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"mydb.sqlite"]; 
success = [fileManager copyItemAtPath:defaultDBPath toPath:writableDBPath error:&error]; 
if (!success) 
{ 
    NSAssert1(0, @"Failed to create writable database file with message '%@'.", [error localizedDescription]); 
} 
} 

-(void)getPoints{ 
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"geositidb.sqlite"]; 
if (sqlite3_open([path UTF8String], &database) == SQLITE_OK) 
{ 

    const char *sql = "SELECT * FROM pointsofinterest"; 

    sqlite3_stmt *searchStatement; 


    if (sqlite3_prepare_v2(database, sql, -1, &searchStatement, NULL) == SQLITE_OK) 
    { 

     listOfTitle = [[NSMutableArray alloc] init]; 
     listOfImages = [[NSMutableArray alloc] init]; 

     while (sqlite3_step(searchStatement) == SQLITE_ROW) 
     { 
      NSString *title = [NSString stringWithUTF8String:(char *)sqlite3_column_text(searchStatement, 2)]; 
      NSString *image = [NSString stringWithUTF8String:(char *)sqlite3_column_text(searchStatement, 10)]; 

      [listOfTitle addObject:title]; 
      [listOfImages addObject:image]; 

     } 
    } 
    sqlite3_finalize(searchStatement); 
} 
} 


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{ 
    return [listOfTitle count]; 
} 

//Table View cell 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ 
static NSString *simpleTableIdentifier [email protected]"Cell"; 
UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier]; 
if(cell == nil){ 
    cell=[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:simpleTableIdentifier]; 
} 

    cell.textLabel.text = [listOfTitle objectAtIndex:indexPath.row]; 


return cell; 
} 


//Detail View items 
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { 
if ([segue.identifier isEqualToString:@"showDetail"]) { 
    NSIndexPath *indexPath = [self.sendDataTable indexPathForSelectedRow]; 
     DetailPointsVC *destViewController = segue.destinationViewController; 
destViewController.dataName = [listOfTitle objectAtIndex:indexPath.row]; 
destViewController.dataImage = [listOfImages objectAtIndex:indexPath.row]; 



} 
} 

@end 

DetailPointsVC.h

@interface DetailPointsVC : UIViewController 
//UILabel 
@property (nonatomic, strong) IBOutlet UILabel *dataLabel; 
@property (nonatomic, strong) NSString *dataName; 
//UIImageView 
@property (weak, nonatomic) IBOutlet UIImageView *dataImageView; 
@property (nonatomic, strong) NSString *dataImage; 

DetailPointsVC.m

@interface DetailPointsVC() 

@end 

@implementation DetailPointsVC 
@synthesize dataLabel; 
@synthesize dataName; 
@synthesize dataImageView; 
@synthesize dataImage; 
- (void)viewDidLoad { 
[super viewDidLoad]; 
self.dataLabel.text = dataName; 
self.dataImageView.image = [UIImage imageNamed:dataImage]; 
} 
@end 

在此详细视图的按钮以打开该图像应显示

Answer 1

所以另一种观点认为，主要有以下视图控制器：

List ---> Detail ----> Image 
        | 
        |--> Map 
        | 
        ---> PDF 

按要求“详细信息”您只需通过尽可能多的细节在'List'的prepareForSegue:方法中，并在单击按钮时将它们传递给下一个视图控制器。例如：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { 
    if ([segue.identifier isEqualToString:@"showImage"]) { 
     DetailImageVC *destViewController = segue.destinationViewController; 
     destViewController.dataImage = self.dataImage; 
    } 
}