データベースが存在するかどうかを確認するダッシュボード ViewController があり、存在しない場合は、データベースが作成されるログイン ViewController にユーザーを送信します。次に、ユーザーはサインインする必要があり、パスワードとユーザー名が SQLite データベースに保存されます。次に、ダッシュボードの ViewController に送信されます。これに関する問題は、ユーザーがサインインしてダッシュボード ViewController に送り返されると、拒否されてログイン ViewController に送り返されることです。情報がデータベースに保存されていないのか、それとも何が起こっているのかはわかりませんが、これが私のログイン m ファイルです
#import "LoginView.h"
#import "SBJson.h"
#import "SignupView.h"
#import "sqlite3.h"
@interface LoginView ()
@end
@implementation LoginView
@synthesize txtPassword;
@synthesize txtUsername;
-(void)viewDidLoad {
NSString *docsDir;
NSArray *dirPaths;
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
// Build the path to the database file
databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: @"username.db"]];
NSFileManager *filemgr = [NSFileManager defaultManager];
if ([filemgr fileExistsAtPath: databasePath ] == NO)
{
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &usernameDB) == SQLITE_OK)
{
char *errMsg;
const char *sql_stmt = "CREATE TABLE IF NOT EXISTS USERNAME (USERNAME TEXT, PASSWORD TEXT)";
if (sqlite3_exec(usernameDB, sql_stmt, NULL, NULL, &errMsg) != SQLITE_OK)
{
}
sqlite3_close(usernameDB);
} else {
}
}
[super viewDidLoad];
}
- (void) alertStatus:(NSString *)msg :(NSString *)title
{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title
message:msg
delegate:self
cancelButtonTitle:@"Ok"
otherButtonTitles:nil, nil];
[alertView show];
}
- (IBAction)signupButton:(id)sender {
SignupView *myView = [[SignupView alloc] initWithNibName:@"SignupView" bundle:nil];
[myView setModalPresentationStyle:UIModalPresentationFormSheet]; //you can change the way it is presented
[myView setModalTransitionStyle:UIModalTransitionStyleCoverVertical]; //you can change the animation
[self presentViewController:myView animated:YES completion:nil]; //show the modal view
}
- (IBAction)backgroundClicked:(id)sender {
[txtUsername resignFirstResponder];
[txtPassword resignFirstResponder];
}
- (IBAction)loginClicked:(id)sender {
@try {
if([[txtUsername text] isEqualToString:@""] || [[txtPassword text] isEqualToString:@""] ) {
[self alertStatus:@"Please enter both Username and Password" :@"Login Failed!"];
} else {
NSString *post =[[NSString alloc] initWithFormat:@"username=%@&password=%@",[txtUsername text],[txtPassword text]];
NSLog(@"PostData: %@",post);
NSURL *url=[NSURL URLWithString:@"http://example.com/ios_login/index.php"];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:postData];
//[NSURLRequest setAllowsAnyHTTPSCertificate:YES forHost:[url host]];
NSError *error = [[NSError alloc] init];
NSHTTPURLResponse *response = nil;
NSData *urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSLog(@"Response code: %d", [response statusCode]);
if ([response statusCode] >=200 && [response statusCode] <300)
{
NSString *responseData = [[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
NSLog(@"Response ==> %@", responseData);
SBJsonParser *jsonParser = [SBJsonParser new];
NSDictionary *jsonData = (NSDictionary *) [jsonParser objectWithString:responseData error:nil];
NSLog(@"%@",jsonData);
NSInteger success = [(NSNumber *) [jsonData objectForKey:@"success"] integerValue];
NSLog(@"%d",success);
if(success == 1)
{
[self saveData];
} else {
NSString *error_msg = (NSString *) [jsonData objectForKey:@"error_message"];
[self alertStatus:error_msg :@"Login Failed!"];
}
} else {
if (error) NSLog(@"Error: %@", error);
[self alertStatus:@"Connection Failed" :@"Login Failed!"];
}
}
}
@catch (NSException * e) {
NSLog(@"Exception: %@", e);
[self alertStatus:@"Login Failed." :@"Login Failed!"];
}
}
-(void)saveData{
sqlite3_stmt *statement;
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &usernameDB) == SQLITE_OK)
{
NSString *insertSQL = [NSString stringWithFormat: @"INSERT INTO USERNAME (username, password) VALUES (\"%@\", \"%@\")", txtUsername.text, txtPassword.text];
const char *insert_stmt = [insertSQL UTF8String];
sqlite3_prepare_v2(usernameDB, insert_stmt, -1, &statement, NULL);
if (sqlite3_step(statement) == SQLITE_DONE)
{
}
sqlite3_finalize(statement);
sqlite3_close(usernameDB);
[self dismissViewControllerAnimated:YES completion:nil];
}
}
@end
これが私のダッシュボードです M
#import "ViewController.h"
#import "LoginView.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidAppear:(BOOL)animated {
[self checkIfLogged];
}
- (void) checkIfLogged
{
const char *dbpath = [databasePath UTF8String];
sqlite3_stmt *statement;
if (sqlite3_open(dbpath, &usernameDB) == SQLITE_OK) //second if
{
NSString *querySQL = [NSString stringWithFormat: @"SELECT * FROM username"];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(usernameDB, query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
if (sqlite3_step(statement) == SQLITE_ROW)
{//match found
} else {// match not found
LoginView *loginView = [[LoginView alloc] initWithNibName:@"LoginView" bundle:nil];
[loginView setModalPresentationStyle:UIModalPresentationFormSheet];
[loginView setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[self presentViewController:loginView animated:YES completion:nil];
}//end else
sqlite3_finalize(statement);
}//end second if
else{
LoginView *loginView = [[LoginView alloc] initWithNibName:@"LoginView" bundle:nil];
[loginView setModalPresentationStyle:UIModalPresentationFormSheet];
[loginView setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
[self presentViewController:loginView animated:YES completion:nil];
}
sqlite3_close(usernameDB);
}//end first IF
}//end checkIfLogged
@end
情報がデータベースに保存されていないように感じますが、その理由はわかりません。この情報は、saveData() の下のログイン ビューに保存する必要があります。