iOS+PHP注册登录系统 iOS部分（下）

接着《ios+php注册登录系统 php部分（上）》进行学习

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. 
// 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); 
  return jsondic; 
} 
//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。

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. 
// 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. 
} 
//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); 
  return jsondic; 
} 
 
- (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 

到这里所有的代码都已经写完了，我是一个新手，如果有不足或者代码错误之处还请指出。谢谢各位读者。

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