Objective c 登录失败仍然会转到下一个视图控制器
虽然我以前成功地做到了这一点，但这次我想不出来了。我有一个基本的登录屏幕作为第一个VC启动时加载。成功登录（来自数据库的适当用户名/密码组合）确实允许在没有任何警报的情况下进行访问。但是…任何不正确的组合（或者根本没有用户名/密码），都会导致我想要的alertView，但下一个VC还是会加载。我做错了什么？在发生故障时，不应该有任何中断，只有一个警报 LoginViewController.mObjective c 登录失败仍然会转到下一个视图控制器,objective-c,ios7,login,segue,Objective C,Ios7,Login,Segue,虽然我以前成功地做到了这一点，但这次我想不出来了。我有一个基本的登录屏幕作为第一个VC启动时加载。成功登录（来自数据库的适当用户名/密码组合）确实允许在没有任何警报的情况下进行访问。但是…任何不正确的组合（或者根本没有用户名/密码），都会导致我想要的alertView，但下一个VC还是会加载。我做错了什么？在发生故障时，不应该有任何中断，只有一个警报 LoginViewController.m @implementation LoginViewController - (IBAction)un
@implementation LoginViewController
- (IBAction)unwindToLoginViewController:(UIStoryboardSegue *)unwindSegue
{
}
- (IBAction)loginClicked:(id)sender {
NSInteger success = 0;
@try {
if([[self.usernameText text] isEqualToString:@""] || [[self.passwordText text] isEqualToString:@""] ) {
[self alertStatus:@"Please enter Email and Password" :@"Sign in Failed!" :0];
} else {
NSString *post =[[NSString alloc] initWithFormat:@"username=%@&password=%@",[self.usernameText text],[self.passwordText text]];
NSLog(@"PostData: %@",post);
NSURL *url=[NSURL URLWithString:@"http://www.techinworship.com/auth.php"];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[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: %ld", (long)[response statusCode]);
if ([response statusCode] >= 200 && [response statusCode] < 300)
{
NSString *responseData = [[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
NSLog(@"Response ==> %@", responseData);
NSError *error = nil;
NSDictionary *jsonData = [NSJSONSerialization
JSONObjectWithData:urlData
options:NSJSONReadingMutableContainers
error:&error];
success = [jsonData[@"success"] integerValue];
NSLog(@"Success: %ld",(long)success);
if(success == 1)
{
NSLog(@"Login SUCCESS");
} else {
NSString *error_msg = (NSString *) jsonData[@"error_message"];
[self alertStatus:error_msg :@"Sign in Failed!" :0];
}
} else {
//if (error) NSLog(@"Error: %@", error);
[self alertStatus:@"Connection Failed" :@"Sign in Failed!" :0];
}
}
}
@catch (NSException * e) {
NSLog(@"Exception: %@", e);
[self alertStatus:@"Sign in Failed." :@"Error!" :0];
}
if (success) {
[self performSegueWithIdentifier:@"login_success" sender:self];
}
}
- (void) alertStatus:(NSString *)msg :(NSString *)title :(int) tag
{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title
message:msg
delegate:self
cancelButtonTitle:@"Ok"
otherButtonTitles:nil, nil];
alertView.tag = tag;
[alertView show];
}
- (IBAction)backgroundTap:(id)sender {
[self.view endEditing:YES];
}
-(BOOL) textFieldShouldReturn:(UITextField *)textField{
[textField resignFirstResponder];
return YES;
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
@implementation LoginViewController
-（iAction）UnwindToLoginView控制器：（UIStoryboardSegue*）unwindSegue
{
}
-（iAction）登录勾选：（id）发件人{
NSInteger成功率=0；
@试一试{
if（[[self.usernameText]IseQualtString:@”“][[self.passwordText]IseQualtString:@”“]））{
[自我提醒状态：@“请输入电子邮件和密码”：@“登录失败！”：0]；
}否则{
NSString*post=[[NSString alloc]initWithFormat:@“用户名=%@&密码=%@”，[self.usernameText]，[self.passwordText]；
NSLog（@“PostData:%@”，post）；
NSURL*url=[NSURL URLWithString:@”http://www.techinworship.com/auth.php"];
NSData*postData=[post数据使用编码：NSASCIIStringEncoding allowLossyConversion:是]；
NSString*postLength=[NSString stringWithFormat:@“%lu”，（无符号长）[postData长度]]；
NSMutableURLRequest*请求=[[NSMutableURLRequest alloc]init]；
[请求设置url:url]；
[请求设置HttpMethod:@“POST”]；
[请求设置值：HttpHeaderField的postLength:@“内容长度”]；
[请求设置值：@“应用程序/json”用于HttpHeaderField:@“接受”]；
[请求设置值：@“应用程序/x-www-form-urlencoded”forHTTPHeaderField:@“内容类型”]；
[请求setHTTPBody:postData]；
//[NSURLRequest setAllowsAnyHttpSCCertificate:YES for主机：[url主机]]；
NSError*error=[[NSError alloc]init]；
NSHTTPURLResponse*响应=nil；
NSData*urlData=[NSURLConnection sendSynchronousRequest:request returningResponse:&响应错误：&错误]；
NSLog（@“响应代码：%ld”，（长）[响应状态代码]）；
如果（[response statusCode]>=200&&[response statusCode]<300）
{
NSString*responseData=[[NSString alloc]initWithData:urlData编码：NSUTF8StringEncoding]；
NSLog（@“响应==>%@”，响应数据）；
n错误*错误=nil；
NSDictionary*jsonData=[NSJSONSerialization
JSONObjectWithData:urlData
选项：NSJSONReadingMutableContainers
错误：&错误]；
success=[jsonData[@“success”]integerValue]；
NSLog（@“成功：%ld”，（长）成功）；
如果（成功==1）
{
NSLog（@“登录成功”）；
}否则{
NSString*错误消息=（NSString*）jsonData[@“错误消息”]；
[自我提醒状态：错误消息：@“登录失败！”：0]；
}
}否则{
//if（error）NSLog（@“error:%@”，error）；
[自我提醒状态：@“连接失败”：@“登录失败！”：0]；
}
}
}
@捕获（N例外*e）{
NSLog（@“异常：%@”，e）；
[自我提醒状态：@“登录失败”。：@“错误！”：0]；
}
如果（成功）{
[self-PerformsgueWithIdentifier:@“登录成功”发件人：self]；
}
}
-（void）alertStatus:（NSString*）msg:（NSString*）title:（int）标记
{
UIAlertView*alertView=[[UIAlertView alloc]initWithTitle:title
信息：msg
代表：赛尔夫
取消按钮：@“确定”
其他按钮类型：无，无]；
alertView.tag=标签；
[警报视图显示]；
}
-（iAction）背景点击：（id）发送者{
[自视图编辑：是]；
}
-（BOOL）textField应返回：（UITextField*）textField{
[textField resignFirstResponder]；
返回YES；
}
-（id）initWithNibName:（NSString*）nibNameOrNil bundle:（NSBundle*）nibBundleOrNil
{
self=[super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]；
如果（自我）{
//自定义初始化
}
回归自我；
}
-（无效）viewDidLoad
{
[超级视图下载]；
//加载视图后执行任何其他设置。
}
-（无效）未收到记忆警告
{
[超级记忆警告]；
//处置所有可以重新创建的资源。
}
/*
#pragma标记-导航
//在基于故事板的应用程序中，您通常需要在导航之前做一些准备
-（void）prepareForSegue:（UIStoryboardSegue*）segue发送方：（id）发送方
{
//使用[segue destinationViewController]获取新的视图控制器。
//将选定对象传递给新的视图控制器。
}
*/
@结束
@interface LoginViewController : UIViewController <UITextFieldDelegate>
@property (strong, nonatomic) IBOutlet UIButton *signUpButton;
@property (strong, nonatomic) IBOutlet UIButton *forgotPasswordButton;
@property (strong, nonatomic) IBOutlet UITextField *passwordText;
@property (strong, nonatomic) IBOutlet UITextField *usernameText;
- (IBAction)loginClicked:(id)sender;
- (IBAction)backgroundTap:(id)sender;
@end
@interface LoginViewController:UIViewController
@属性（强，非原子）IBUIButton*signUpButton；
@属性（强，非原子）IBUIButton*forgotPasswordButton；
@属性（强，非原子）IBOutlet UITextField*passwordText；
@属性（强，非原子）IBOutlet UITextField*usernameText；
-（iAction）登录勾选：（id）发件人；
-（iAction）背景点击：（id）发送者；
@结束
- （iAction）登录勾选：（id）发件人{
NSInteger成功率=0；
@试一试
if([[self.usernameText text] isEqualToString:@""] || [[self.passwordText text] isEqualToString:@""] ) { [self alertStatus:@"Please enter Email and Password" :@"Sign in Failed!" :0]; } else { NSString *post =[[NSString alloc] initWithFormat:@"username=%@&password=%@",[self.usernameText text],[self.passwordText text]]; NSLog(@"PostData: %@",post); NSURL *url=[NSURL URLWithString:@"http://www.techinworship.com/auth.php"]; NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[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: %ld", (long)[response statusCode]); if ([response statusCode] >= 200 && [response statusCode] < 300) { NSString *responseData = [[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding]; NSLog(@"Response ==> %@", responseData); NSError *error = nil; NSDictionary *jsonData = [NSJSONSerialization JSONObjectWithData:urlData options:NSJSONReadingMutableContainers error:&error]; success = [jsonData[@"success"] integerValue]; NSLog(@"Success: %ld",(long)success); if(success == 1) { NSLog(@"Login SUCCESS"); [self performSegueWithIdentifier:@"login_success" sender:self]; } else { NSString *error_msg = (NSString *) jsonData[@"error_message"]; [self alertStatus:error_msg :@"Sign in Failed!" :0]; } } else { //if (error) NSLog(@"Error: %@", error); [self alertStatus:@"Connection Failed" :@"Sign in Failed!" :0]; } }