接著上篇《iOS+PHP注冊登錄系統 PHP部分（上）》進行學習
3.iOS部分
上一次我們寫完了數據庫部分和PHP部分這次我們來完成iOS部分。
首先先在storyboard中一陣狂拖，弄成如下圖。
可以先在text Field中輸入用戶名和密碼 方便以后調試。
3.1登錄部分代碼
創建一個新的UIViewController 名為registViewController（用于注冊用戶，ViewController用于登錄）。
在ViewController.h中importregistViewController
#import "registViewController.h"
然后設置登錄界面中的控件 用來寫用戶名的控件名設置為txtUser,密碼的控件名設置為txtPwd,確定按鈕的方法名稱為
LoginClick,注冊按鈕的方法名為registButton。
然后開始寫ViewController.m中的代碼
// // ViewController.m // iosLogin // // Created by 曹晗 on 16/2/25. // Copyright :emoji: 2016年 CaoHan. All rights reserved. // #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]; } //用于請求PHP 獲得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]; //加載一個NSURL對象 NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]]; //將請求的url數據放到NSData對象中 NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; //IOS5自帶解析類NSJSONSerialization從response中解析出數據放到字典中 NSDictionary *jsonDic = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error]; NSLog(@"接收到的數據為%@",jsonDic); return jsonDic; } //彈出信息 - (void)aletrInfo:(NSString *)loginFlag{ UIAlertView *alert = [[UIAlertView alloc]init]; [alert setTitle:@"提示"]; [alert setDelegate:nil]; [alert addButtonWithTitle:@"確定"]; if ([loginFlag isEqual: @"0"]) { [alert setMessage:@"賬號或密碼錯誤"]; } if ([loginFlag isEqual:@"1"]) { [alert setMessage:@"登陸成功"]; } [alert show]; } @end 在注冊按鈕能夠跳轉界面前，要先將stroyboard中的注冊界面的stroyboard ID設置為vc2才可以進行跳轉。
其中這里的192.168.1.106可以寫localhost也可以寫自己的ip地址。
寫到這里就可以先進行調試一下登錄了。后面的注冊用戶代碼也和這里差不多。
3.2注冊界面代碼
先在registViewCongroller.h中import ViewController.h
#import "ViewController.h"
然后是registViewController.m中的代碼。
// // registViewController.m // iosLogin // // Created by 曹晗 on 16/2/27. // Copyright 2016年 CaoHan. All rights reserved. // #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. } //這個是注冊按鈕 - (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]; } //這個是返回按鈕 - (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]; //加載一個NSURL對象 NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]]; //將請求的url數據放到NSData對象中 NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; //IOS5自帶解析類NSJSONSerialization從response中解析出數據放到字典中 NSDictionary *jsonDic = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error]; NSLog(@"接收到的數據為%@",jsonDic); return jsonDic; } - (void)aletrInfo:(NSString *)registFlag{ UIAlertView *alert = [[UIAlertView alloc]init]; [alert setTitle:@"提示"]; [alert setDelegate:nil]; [alert addButtonWithTitle:@"確定"]; if ([registFlag isEqual: @"0"]) { [alert setMessage:@"用戶名已存在"]; } if ([registFlag isEqual:@"1"]) { [alert setMessage:@"注冊成功"]; } [alert show]; } @end 到這里所有的代碼都已經寫完了，我是一個新手，如果有不足或者代碼錯誤之處還請指出。謝謝各位讀者。
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VEVB武林網。
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