如何从服务器数据库中检查用户名和密码，并在iPhone中显示新页面？
我有一个应用程序，其中我有一个由用户名和密码组成的登录表单。当用户输入用户名和密码时，应通过服务器api数据库验证其用户名和密码，如果他是有效用户，则应让他登录 我通过服务器api数据库发布登录信息的代码如下：如何从服务器数据库中检查用户名和密码，并在iPhone中显示新页面？,iphone,objective-c,api,sqlite,Iphone,Objective C,Api,Sqlite,我有一个应用程序，其中我有一个由用户名和密码组成的登录表单。当用户输入用户名和密码时，应通过服务器api数据库验证其用户名和密码，如果他是有效用户，则应让他登录 我通过服务器api数据库发布登录信息的代码如下： -(void)sendRequest { UIDevice *device = [UIDevice currentDevice]; NSString *udid = [device uniqueIdentifier]; NSSt
-(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)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"];
NSLog(@"%@",result.UserID);
[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;
NSTimeInterval timeStamp = [[NSDate date] timeIntervalSince1970];
NSNumber *timeStampObj = [NSNumber numberWithInt: timeStamp];
NSLog(@"%@",timeStampObj);
NSString *journeyid = [NSString stringWithFormat:@"%@_%@_%@", result.UserID, result.DeviceInfoId, timeStampObj];
if(sqlite3_open([filePath UTF8String], &database) == SQLITE_OK) {
const char *sqlStatement = "insert into UserInformation(journeyid,UserID,DeviceId,Username,Password,FirstName,Email) VALUES (?,?,?,?,?,?,?)";
sqlite3_stmt *compiledStatement;
if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) {
sqlite3_bind_text( compiledStatement, 1, [journeyid UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text( compiledStatement, 2, [result.UserID UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text(compiledStatement, 3, [result.DeviceInfoId UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text(compiledStatement, 4, [txtUserName.text UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text(compiledStatement, 5, [txtPassword.text UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text (compiledStatement, 6, [result.FirstName UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text (compiledStatement, 7, [result.Email UTF8String],-1,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];
}
-(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)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"];
NSLog(@"%@",result.UserID);
[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;
NSTimeInterval timeStamp = [[NSDate date] timeIntervalSince1970];
NSNumber *timeStampObj = [NSNumber numberWithInt: timeStamp];
NSLog(@"%@",timeStampObj);
NSString *journeyid = [NSString stringWithFormat:@"%@_%@_%@", result.UserID, result.DeviceInfoId, timeStampObj];
if(sqlite3_open([filePath UTF8String], &database) == SQLITE_OK) {
const char *sqlStatement = "insert into UserInformation(journeyid,UserID,DeviceId,Username,Password,FirstName,Email) VALUES (?,?,?,?,?,?,?)";
sqlite3_stmt *compiledStatement;
if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) {
sqlite3_bind_text( compiledStatement, 1, [journeyid UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text( compiledStatement, 2, [result.UserID UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text(compiledStatement, 3, [result.DeviceInfoId UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text(compiledStatement, 4, [txtUserName.text UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text(compiledStatement, 5, [txtPassword.text UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text (compiledStatement, 6, [result.FirstName UTF8String],-1,SQLITE_TRANSIENT);
sqlite3_bind_text (compiledStatement, 7, [result.Email UTF8String],-1,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];
}
问题是，当用户输入其用户名和密码时，用户名和密码应通过服务器数据库验证，如果用户有效，则应允许其登录。更改JSON响应，使用其他键发送登录成功/失败的响应。使用
NSString *loginres=[result valueForKey:@"LoginResponse"];
if([loginres isEqualToString:@"Success"]
{
//Valid user
}
else
{
//InValid user
}
if(values!=NULL)
{
//Valid user
}
else
{
//InValid user
}
您在这段代码中遇到了什么问题？如果用户有效或无效，则服务器应在JSON或您从JSON创建的字典中返回消息。你能告诉我们，如果用户无效，服务器会返回什么吗？Hi@iAmitWagh，我在这段代码中没有遇到任何问题。实际上，在这段代码中，我将登录信息发布到我的api服务器，并保存到我的sqlite数据库中，但实际上，当用户输入用户名和密码字段时，我希望，用户名和密码应该直接从我的api服务器数据库验证，而不是从sqlite数据库验证。ThanksHi@WTP，我在这段代码中没有遇到任何问题。实际上，在这段代码中，我将登录信息发布到我的api服务器并保存到我的sqlite数据库中，但实际上我希望在用户输入用户名和密码字段时，用户名和密码应该直接从我的api服务器数据库验证，而不是从sqlite数据库验证。谢谢您应该更改api，以便它可以返回用户是否有效的响应。Hi@KingofBliss，我尝试了你的代码，但是他们的代码有问题。当我输入错误的用户名和密码时，也表明它是一个有效的用户，然后你的Web服务出现问题。请换一下，你能告诉我哪里出了问题吗。我已经尝试过这样的代码NSString*json_string=[[NSString alloc]initWithData:webData编码：NSUTF8StringEncoding]；NSDictionary*结果=[json_字符串JSONValue]；NSArray*值=[result objectForKey:@result]；ifvalues=空{NSLog@Valid用户；}其他{NSLog@InvalidUser；}Hi@kingoffliss，我现在不知道该更改什么。更改的JSON响应是什么