Question

我有一个带有tableView的数据库，我在使用终端创建的sqlite文件中将数据库分开，并且一个视图允许我创建我的数据，然后将其输入到数据库中，但是当我单击保存时它似乎没有被保存。

以下是我的sqlite脚本：

-(void) addPatientToDatabase:(Patient *)newPatient {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsPath = [paths objectAtIndex:0];
    NSString *filePath = [documentsPath stringByAppendingPathComponent:@"cities.sqlite"];

    sqlite3 *database;

    if(sqlite3_open([filePath UTF8String], &database) == SQLITE_OK) {
        const char *sqlStatement = "insert into patients (firstName, surname, dob, homeNumber, mobileNumber, email, address, image) VALUES (?, ?, ?, ?, ?, ?, ?, ?)";
        sqlite3_stmt *compiledStatement;
        if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) {
            sqlite3_bind_text(compiledStatement, 1, [newPatient.patientName UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(compiledStatement, 2, [newPatient.patientSurname UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(compiledStatement, 3, [newPatient.patientDoB UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(compiledStatement, 4, [newPatient.patientHomeNumber UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(compiledStatement, 5, [newPatient.patientMobileNumber UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(compiledStatement, 6, [newPatient.patientEmail UTF8String], -1, SQLITE_TRANSIENT);
            sqlite3_bind_text(compiledStatement, 7, [newPatient.patientAddress UTF8String], -1, SQLITE_TRANSIENT);
            NSData *dataForPicture = UIImagePNGRepresentation(newPatient.patientPicture);
            sqlite3_bind_blob(compiledStatement, 8, [dataForPicture bytes], [dataForPicture length], SQLITE_TRANSIENT);
        }
        if(sqlite3_step(compiledStatement) == SQLITE_DONE) {
            sqlite3_finalize(compiledStatement);
        }
    }
    sqlite3_close(database);
}

和

    Patient *newPatient = [[Patient alloc] init];
    newPatient.patientName = firstnameEntry.text;
    newPatient.patientSurname = surnameEntry.text;
    newPatient.patientDoB = dobEntry.text;
    newPatient.patientHomeNumber = homeNumberEntry.text;
    newPatient.patientMobileNumber = mobileNumberEntry.text;
    newPatient.patientEmail = emailAddressEntry.text;
    newPatient.patientAddress = addressEntry.text;
    newPatient.patientPicture = patientPicture;
    [patients addObject:newPatient];
    [self addPatientToDatabase:newPatient];

和

-(NSString *)copyDatabaseToDocuments {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString * documentsPath = [paths objectAtIndex:0];
    NSString *filepath = [documentsPath  stringByAppendingPathComponent:@"patients.sqlite"];

    if (![fileManager fileExistsAtPath:filepath]) {
        NSString *bundlePath = [[[NSBundle mainBundle] resourcePath]stringByAppendingPathComponent:@"patients.sqlite"];
        [fileManager copyItemAtPath:bundlePath toPath:filepath error:nil];
    }
    return filepath;
}

-(void) readPatientsFromDatabaseWithPath:(NSString *)filePath {
    sqlite3 *database;

    if (sqlite3_open([filePath UTF8String], &database) == SQLITE_OK) {
        const char *sqlStateMent = "select * from patients";
        sqlite3_stmt *compiledStatement;
        if (sqlite3_prepare(database, sqlStateMent, -1, &compiledStatement, NULL) == SQLITE_OK) {
            while (sqlite3_step(compiledStatement) == SQLITE_ROW) {
                NSString *firstName = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)];
                NSString *surname = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)];
                NSString *dob = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 3)];
                NSString *homeNumber = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 4)];
                NSString *mobileNumber = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 5)];
                NSString *email = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 6)];
                NSString *address = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 7)];
                NSData *patientData = [[NSData alloc] initWithBytes:sqlite3_column_blob(compiledStatement, 8) length:sqlite3_column_bytes(compiledStatement, 8)];
                UIImage *patientImage = [UIImage imageWithData:patientData];
                Patient *newPatient = [[Patient alloc] init];
                newPatient.patientName = firstName;
                newPatient.patientSurname = surname;
                newPatient.patientDoB = dob;
                newPatient.patientHomeNumber = homeNumber;
                newPatient.patientMobileNumber = mobileNumber;
                newPatient.patientEmail = email;
                newPatient.patientAddress = address;
                newPatient.patientPicture = (UIImage *)patientImage;
                [self.patients addObject:newPatient];
            }
        }
        sqlite3_finalize(compiledStatement);
    }
    sqlite3_close(database);
}

它似乎不喜欢if(sqlite3_step(compiledStatement) == SQLITE_DONE) {

我尝试在读取过程中放置一个断点，但它也没有到达断点

很抱歉，代码太多，文字也不多。

如果您想要更多代码或详细信息，请说明。

提前致谢

Answer 1

您是否在首次使用数据库之前初始化数据库并在本地文件系统上创建。

如果您不是，那么您可以使用以下代码来执行此操作：

-(void) checkAndCreateDatabase
{

NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDir = [documentPaths objectAtIndex:0];
    NSString *databaseName = @"mydatabase.db";
    NSString *databasePath = [documentsDir stringByAppendingPathComponent:databaseName];
// Check if the SQL database has already been saved to the users phone, if not then copy it over
BOOL success;

// Create a FileManager object, we will use this to check the status
// of the database and to copy it over if required
NSFileManager *fileManager = [NSFileManager defaultManager];
// Check if the database has already been created in the users filesystem
success = [fileManager fileExistsAtPath:databasePath];

// If the database already exists then return without doing anything
if(success) return;

// If not then proceed to copy the database from the application to the users filesystem

// Get the path to the database in the application package
NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:databaseName];

// Copy the database from the package to the users filesystem
[fileManager copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];


}

SQLite数据库不保存数据

1 个答案: