iOS+PHP注册登录系统 iOS部分（下）

时间：2022-06-24 22:43:53 编辑：袖梨来源：一聚教程网

3.iOS部分

上一次我们写完了数据库部分和PHP部分这次我们来完成iOS部分。
首先先在storyboard中一阵狂拖，弄成如下图。
可以先在text Field中输入用户名和密码方便以后调试。

3.1登录部分代码

创建一个新的UIViewController 名为registViewController（用于注册用户，ViewController用于登录）。
在ViewController.h中importregistViewController
#import "registViewController.h"

然后设置登录界面中的控件用来写用户名的控件名设置为txtUser,密码的控件名设置为txtPwd,确定按钮的方法名称为
LoginClick,注册按钮的方法名为registButton。
然后开始写ViewController.m中的代码

// ViewController.m

// iosLogin

// Created by 曹晗 on 16/2/25.

#import "ViewController.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UITextField *txtUser;

@property (weak, nonatomic) IBOutlet UITextField *txtPwd;

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

- (IBAction)LoginClick:(id)sender {

//前后去空格

NSString *userName = [_txtUser.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

NSString *userPwd = [_txtPwd.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

NSDictionary *jsonDic = [self getJsonData:userName userpwd:userPwd];

NSString* loginFlag = [jsonDic objectForKey:@"loginFlag"];

NSLog(@"%@",loginFlag);

[self aletrInfo:loginFlag];

}

- (IBAction)registButton:(id)sender {

UIStoryboard *storboard = self.storyboard;

registViewController *vc2 = [storboard instantiateViewControllerWithIdentifier:@"vc2"];

[self presentViewController:vc2 animated:YES completion:nil];

}

//用于请求PHP 获得JSON

- (NSDictionary *)getJsonData:(NSString *)user_name userpwd:(NSString *)user_pwd {

NSError *error;

NSString *urlString = [NSString stringWithFormat:@"http://192.168.1.106/iosLogin/index.php?action=login&user_name=%@&user_pwd=%@",user_name,user_pwd];

//加载一个NSURL对象

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];

//将请求的url数据放到NSData对象中

NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

//IOS5自带解析类NSJSONSerialization从response中解析出数据放到字典中

NSDictionary *jsonDic = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];

NSLog(@"接收到的数据为%@",jsonDic);

returnjsonDic;

}

//弹出信息

- (void)aletrInfo:(NSString *)loginFlag{

UIAlertView *alert = [[UIAlertView alloc]init];

[alert setTitle:@"提示"]; [alert setDelegate:nil];

[alert addButtonWithTitle:@"确定"];

if([loginFlag isEqual: @"0"]) {

[alert setMessage:@"账号或密码错误"];

}

if([loginFlag isEqual:@"1"]) {

[alert setMessage:@"登陆成功"];

}

[alert show];

}

@end

在注册按钮能够跳转界面前，要先将stroyboard中的注册界面的stroyboard ID设置为vc2才可以进行跳转。

复制代码代码如下:

NSString *urlString = [NSString stringWithFormat:@"http://192.168.1.106/iosLogin/index.php?action=login&user_name=%@&user_pwd=%@",user_name,user_pwd];

其中这里的192.168.1.106可以写localhost也可以写自己的ip地址。
写到这里就可以先进行调试一下登录了。后面的注册用户代码也和这里差不多。

3.2注册界面代码
先在registViewCongroller.h中import ViewController.h
#import "ViewController.h"
然后是registViewController.m中的代码。

// registViewController.m

// iosLogin

// Created by 曹晗 on 16/2/27.

#import "registViewController.h"

@interface registViewController ()

@property (weak, nonatomic) IBOutlet UITextField *txtUser;

@property (weak, nonatomic) IBOutlet UITextField *txtPwd;

@end

@implementation registViewController

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view.

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

//这个是注册按钮

- (IBAction)registButton:(id)sender {

NSString *userName = [_txtUser.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

NSString *userPwd = [_txtPwd.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

NSDictionary *jsonDic = [self getJsonData:userName userpwd:userPwd];

NSString* registFlag = [jsonDic objectForKey:@"registFlag"];

NSLog(@"%@",registFlag);

[self aletrInfo:registFlag];

}

//这个是返回按钮

- (IBAction)returnButton:(id)sender {

[self dismissModalViewControllerAnimated:YES];

}

- (NSDictionary *)getJsonData:(NSString *)user_name userpwd:(NSString *)user_pwd {

NSError *error;

NSString *urlString = [NSString stringWithFormat:@"http://192.168.1.106/iosLogin/index.php?action=regist&user_name=%@&user_pwd=%@",user_name,user_pwd];

//加载一个NSURL对象

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];

//将请求的url数据放到NSData对象中

NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

//IOS5自带解析类NSJSONSerialization从response中解析出数据放到字典中

NSDictionary *jsonDic = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];

NSLog(@"接收到的数据为%@",jsonDic);

returnjsonDic;

}

- (void)aletrInfo:(NSString *)registFlag{

UIAlertView *alert = [[UIAlertView alloc]init];

[alert setTitle:@"提示"]; [alert setDelegate:nil];

[alert addButtonWithTitle:@"确定"];

if([registFlag isEqual: @"0"]) {

[alert setMessage:@"用户名已存在"];

}

if([registFlag isEqual:@"1"]) {

[alert setMessage:@"注册成功"];

}

[alert show];

}

@end

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