JSON值不会保存到iPhone的SQLite数据库中

如何解决JSON值不会保存到iPhone的SQLite数据库中

| 我有一个应用程序，其中通过HTTP POST方法将数据发布到服务器API数据库，并以JSON格式获取响应。我想读取JSON数据并将其保存在sqlite数据库中。我已经完成了通过HTTP POST方法将数据发布到Web服务器API的操作，但是尚未读取JSON数据并将其保存在数据库中。我创建了一个包含所有JSON数组对象的类。这是.h文件：

#import <Foundation/Foundation.h>


//TokenID\":\"Vao13gifem\",\"isError\":false,\"ErrorMessage\":\"\",\"Result\":[{\"UserId\":\"153\",\"FirstName\":\"Rocky\",\"LastName\":\"Yadav\",\"Email\":\"rocky@itg.com\",\"ProfileImage\":null,\"ThumbnailImage\":null,\"DeviceInfoId\":\"12\"}],\"ErrorCode\":900}
//Terminating in response to SpringBoard\'s termination.



@interface Result : NSObject {

    Nsstring * UserID;
    Nsstring *FirstName;
    Nsstring *LastName;
    Nsstring *Email;
    Nsstring *ProfileImage;
    Nsstring *ThumbnailImage;
    Nsstring *DeviceInfoId;
}
@property (nonatomic,retain) Nsstring *UserID;
@property (nonatomic,retain) Nsstring *FirstName;
@property (nonatomic,retain) Nsstring *LastName;
@property (nonatomic,retain) Nsstring *Email;
@property (nonatomic,retain) Nsstring *ProfileImage;
@property (nonatomic,retain) Nsstring *ThumbnailImage;
@property (nonatomic,retain) Nsstring *DeviceInfoId;

@end

这是.m文件

#import \"Result.h\"

@implementation Result
@synthesize UserID;
@synthesize FirstName;
@synthesize LastName;
@synthesize Email;
@synthesize ProfileImage;
@synthesize ThumbnailImage;
@synthesize DeviceInfoId;

- (void)dealloc {
    [super dealloc];
    [UserID release];
    [FirstName release];
    [LastName release];
    [Email release];
    [ProfileImage release];
    [ThumbnailImage release];
    [DeviceInfoId release];
}

@end

这是我的apicontroller.m

#import \"apicontroller.h\"
#import \"Result.h\"

#import <sqlite3.h>
#define DATABASE_NAME @\"journey.sqlite\"
#define DATABASE_TITLE @\"journey\"

@implementation apicontroller
@synthesize  txtUserName;
@synthesize txtPassword;
@synthesize txtfirstName;
@synthesize txtlast;
@synthesize txtEmail;
@synthesize webData;

- (Nsstring *) getWritableDBPath {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
    Nsstring *documentsDir = [paths objectAtIndex:0];
    return [documentsDir stringByAppendingPathComponent:DATABASE_NAME];
}

-(void)createEditablecopyOfDatabaseIfNeeded 
{
    // Testing for existence
    BOOL success;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,YES);
    Nsstring *documentsDirectory = [paths objectAtIndex:0];
    Nsstring *writableDBPath = [documentsDirectory stringByAppendingPathComponent:DATABASE_NAME];
    NSLog(@\"%@\",writableDBPath);

    success = [fileManager fileExistsAtPath:writableDBPath];
    if (success)
        return;

    // The writable database does not exist,so copy the default to
    // the appropriate location.
    Nsstring *defaultDBPath = [[[NSBundle mainBundle] resourcePath]
                               stringByAppendingPathComponent:DATABASE_NAME];
    success = [fileManager copyItemAtPath:defaultDBPath
                                   toPath:writableDBPath
                                    error:&error];
    if(!success)
    {
        NSAssert1(0,@\"Failed to create writable database file with Message : \'%@\'.\",[error localizedDescription]);
    }
}

-(void)sendRequest
{
    UIDevice *device = [UIDevice currentDevice];
    Nsstring *udid = [device uniqueIdentifier];
    Nsstring *sysname = [device systemName];
    Nsstring *sysver = [device systemVersion];
    Nsstring *model = [device model];
    NSLog(@\"idis:%@\",[device uniqueIdentifier]);
    NSLog(@\"system nameis :%@\",[device systemName]);
    NSLog(@\"System version is:%@\",[device systemVersion]);
    NSLog(@\"System model is:%@\",[device model]);
    NSLog(@\"device orientation is:%d\",[device orientation]);
    Nsstring *post = [Nsstring stringWithFormat:@\"Loginkey=%@&Password=%@&DeviceCode=%@&Firmware=%@&IMEI=%@\",txtUserName.text,txtPassword.text,model,sysver,udid];
    NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; 
    Nsstring *postLength = [Nsstring stringWithFormat:@\"%d\",[postData length]]; 
    NSLog(@\"%@\",postLength);
    NSMutableuRLRequest *request = [[[NSMutableuRLRequest alloc] init] autorelease]; 
    [request setURL:[NSURL URLWithString:@\"http://192.168.0.68:91/journeyMapperAPI?RequestType=Login\"]]; 
    [request setHTTPMethod:@\"POST\"]; 
    [request setValue:postLength forHTTPHeaderField:@\"Content-Length\"]; 
    [request setValue:@\"application/x-www-form-urlencoded\" forHTTPHeaderField:@\"Content-Type\"]; 
    [request setHTTPBody:postData];

    NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

    if (theConnection) {
        webData = [[NSMutableData data] retain];
        NSLog(@\"%@\",webData);
    }
    else 
    {

    }

}

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response 
{   
    [webData setLength: 0]; 
} 

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data 
{         
    [webData appendData:data]; 

} 

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error 
{     
    [connection release];  
    [webData release]; 

} 

-(void)connectionDidFinishLoading:(NSURLConnection *)connection 
{      
    Nsstring *loginStatus = [[Nsstring alloc] initWithBytes: [webData mutableBytes] length:[webData length] encoding:NSUTF8StringEncoding]; 
    NSLog(@\"%@\",loginStatus);  
    Nsstring *json_string = [[Nsstring alloc] initWithData:webData encoding:NSUTF8StringEncoding]; 

    NSDictionary *result = [json_string JSONValue];
    NSArray *values = [result objectForKey:@\"Result\"];
    NSMutableArray *results = [[NSMutableArray alloc] init];

    for (int index = 0; index<[values count]; index++) {
        NSMutableDictionary * value = [values objectAtIndex:index];
        Result * result = [[Result alloc] init];
        result.UserID = [value objectForKey:@\"UserId\"];
        result.FirstName = [value objectForKey:@\"FirstName\"];
        result.LastName =[value objectForKey:@\"LastName\"];
        result.Email =[value objectForKey:@\"Email\"];
        result.ProfileImage =[value objectForKey:@\"ProfileImage\"];
        result.ThumbnailImage =[value objectForKey:@\"ThumbnailImage\"];
        result.DeviceInfoId =[value objectForKey:@\"DeviceInfoId\"];

        [results addobject:result];
        [result release]; 
    }

    for (int index = 0; index<[results count]; index++) {
        Result * result = [results objectAtIndex:index];
        //save the object variables to database here

        [self createEditablecopyOfDatabaseIfNeeded];

        Nsstring *filePath = [self getWritableDBPath];

        sqlite3 *database;

        if(sqlite3_open([filePath UTF8String],&database) == sqlITE_OK) {
            const char *sqlStatement = \"insert into Userinformation(UserID,deviceid,FirstName,Email,) VALUES (?,?,?)\";
            sqlite3_stmt *compiledStatement;
            if(sqlite3_prepare_v2(database,sqlStatement,-1,&compiledStatement,NULL) == sqlITE_OK)    {
                sqlite3_bind_text( compiledStatement,1,[result.UserID UTF8String],sqlITE_TRANSIENT);
                sqlite3_bind_text(compiledStatement,2,[result.DeviceInfoId UTF8String],sqlITE_TRANSIENT);
                sqlite3_bind_text (compiledStatement,3,[result.FirstName UTF8String],4,[result.Email UTF8String],sqlITE_TRANSIENT);

            }
            if(sqlite3_step(compiledStatement) != sqlITE_DONE ) {
                NSLog( @\"Save Error: %s\",sqlite3_errmsg(database) );
            }
            else {
                UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@\"UIAlertView\" message:@\"Record added\" delegate:self cancelButtonTitle:@\"OK\" otherButtonTitles:nil];
                [alert show];
                [alert release];
                alert = nil;
            }

            sqlite3_finalize(compiledStatement);
        }
        sqlite3_close(database);    

    }   
    [loginStatus release];           
    [connection release];  
    [webData release]; 
} 

-(IBAction)click:(id)sender
{
    [self sendRequest];

}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    [txtfirstName resignFirstResponder];
    [txtlast resignFirstResponder];
    [txtUserName resignFirstResponder];
    [txtPassword resignFirstResponder];
    [txtEmail resignFirstResponder];
}
// Implement viewDidLoad to do additional setup after loading the view,typically from a nib.
- (void)viewDidLoad {

    [super viewDidLoad];
    //[self sendRequest];
}


/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotatetoInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations.
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/

- (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.
}

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


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


@end

在connectionFinishLoading方法中，它不比较每个对象，而是直接在NSLog中输出错误：（保存错误：near \“）\”：语法错误）；如何解决此错误？

解决方法

我的猜测是您的SQL语句的列列表中的结尾逗号引起错误：

const char *sqlStatement = \"insert into UserInformation(UserID,DeviceId,FirstName,Email,) VALUES (?,?,?)\";

请注意，Email和)之间有一个逗号。尝试：

const char *sqlStatement = \"insert into UserInformation(UserID,Email) VALUES (?,?)\";

代替。