登陆界面(LTView,UITextField,UIButton)

设置几个类
AppDelegate
LTView
RootViewController
LoginViewController
RegistViewController
PasswordViewController

AppDelegate.m

application中
// 设置一个UIViewController
RootViewController *rootVC=[[RootViewController alloc]init];
// 设置window根视图控制器
self.window.rootViewController=rootVC;
[rootVC release];

LTView.h

@interface LTView : UIView<UITextFieldDelegate>
@property(nonatomic,retain)UILabel *label;
@property(nonatomic,retain)UITextField *textField;
@property(nonatomic,retain)UIButton *button;
@end

LTView.m

-(instancetype)initWithFrame:(CGRect)frame
{
    self=[super initWithFrame:frame];// 这个事情UIView还会做,LTView继承与UIView
    if (self) {
        // 在代码区写额外的事就可以了
        // 模块化
        // 自己调用自己的方法
        [self createView];        
    }
    return self;
}

// 创建无返回值无参数的视图方法
-(void)createView
{
    // label
    self.label=[[UILabel alloc]initWithFrame:CGRectMake(50, 0, 100, 30)];
    [self addSubview:self.label];
    [self.label release];

    // textField
    self.textField=[[UITextField alloc]initWithFrame:CGRectMake(170, 0, 150, 30)];
    [self addSubview:self.textField];
    self.textField.layer.borderWidth=1;
    self.textField.layer.cornerRadius=10;
    self.textField.clearButtonMode=UITextFieldViewModeAlways;
//    self.textField.alpha=0.3;
    self.textField.tag=1;
    self.textField.layer.masksToBounds=YES;
    self.textField.delegate=self;
    [self.textField release];
}

// 回收键盘
-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];
    return self;
}

// 释放   记得
-(void)dealloc
{
    [_textField release];
    [_label release];
    [super dealloc];
}

RootViewController.h

@interface RootViewController : UIViewController
@property(nonatomic,retain)UILabel *label;
@property(nonatomic,retain)UITextField *textField;
@end

RootViewController.m

#import "RootViewController.h"
#import "LoginViewController.h"
#import "RegistViewController.h"
#import "PasswordViewController.h"
#import "LTView.h"

@interface RootViewController ()<UITextFieldDelegate,UIAlertViewDelegate>

@property(nonatomic,retain)UIAlertView *alertview;

@property(nonatomic,assign)BOOL isChecked;

@end

@implementation RootViewController
-(void)dealloc
{
    [_alertview release];
    [super dealloc];
}
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    UIColor *bgColor=[UIColor colorWithPatternImage:[UIImage imageNamed:@"3.jpg"]];
    [self.view setBackgroundColor:bgColor];
    // 设置账户密码label和textField
    LTView *view1=[[LTView alloc]init];
    view1.frame=CGRectMake(0, 100, 375, 30);
    [self.view addSubview:view1];
    view1.label.text=@"账户名";
    view1.textField.clearButtonMode=UITextFieldViewModeAlways;
    view1.textField.placeholder=@"请输入账户名";
    view1.textField.returnKeyType = UIReturnKeyDefault;
    view1.textField.tag=1;
    [view1 release];

    LTView *view2=[[LTView alloc]initWithFrame:CGRectMake(0, 150, 375, 30)];
    [self.view addSubview:view2];
    view2.label.text=@"密码";
    view2.textField.clearButtonMode=UITextFieldViewModeAlways;
    view2.textField.placeholder=@"请输入密码";
    view2.textField.returnKeyType = UIReturnKeyDone;
    view2.textField.secureTextEntry=YES;
//    view2.textField.delegate = self;
    view2.textField.tag=2;
    [view2 release];


    // 设置登陆button
    UIButton *loginButton=[UIButton buttonWithType:UIButtonTypeSystem];
    loginButton.frame=CGRectMake(60, 250, 60, 30);
    [loginButton setTitle:@"登陆" forState:UIControlStateNormal];
    [self.view addSubview:loginButton];
    [loginButton addTarget:self action:@selector(click1:) forControlEvents:UIControlEventTouchUpInside];
    // 设置找回密码button
    UIButton *passwordButton=[UIButton buttonWithType:UIButtonTypeSystem];
    passwordButton.frame=CGRectMake(150, 250, 60, 30);
    [passwordButton setTitle:@"找回密码" forState:UIControlStateNormal];
    [self.view addSubview:passwordButton];
    [passwordButton addTarget:self action:@selector(click2:) forControlEvents:UIControlEventTouchUpInside];
    // 设置注册button
    UIButton *registButton=[UIButton buttonWithType:UIButtonTypeSystem];
    registButton.frame=CGRectMake(240, 250, 60, 30);
    [registButton setTitle:@"注册" forState:UIControlStateNormal];
    [self.view addSubview:registButton];
    [registButton addTarget:self action:@selector(click3:) forControlEvents:UIControlEventTouchUpInside];


    UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(50, 200, 50, 20)];
    [self.view addSubview:label];
    label.text=@"显示密码";
    [label sizeToFit];
    [label release];

    // button
    UIButton *button=[UIButton buttonWithType:UIButtonTypeSystem];
    button.frame=CGRectMake(150, 200, 50, 20);
    [self.view addSubview:button];
    [button setBackgroundImage:[UIImage imageNamed:@"BtnOff.png"] forState:UIControlStateNormal];
    [button sizeToFit];
    [button addTarget:self action:@selector(click4:) forControlEvents:UIControlEventTouchUpInside];

    self.isChecked=YES;
}

// 回收键盘
-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];
    return YES;   
}

// 登陆button的click方法
-(void)click1:(UIButton *)button
{
    UITextField *accountTextfield=(UITextField *)[self.view viewWithTag:1];
    UITextField *passwordTextField=(UITextField *)[self.view viewWithTag:2];

    if ([accountTextfield.text isEqualToString:@"123"]&&[passwordTextField.text isEqualToString:@"333"]) {
        // 创建一个secondVC的对象
        LoginViewController *loginVC=[[LoginViewController alloc]init];        
        // 设置一下跳转时候的动画效果        
        [loginVC setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];        
        // 进行跳转
        [self presentViewController:loginVC animated:YES completion:^{            
        }];
        // 内存管理
        [loginVC release];        
    }
    else{
        self.alertview=[[UIAlertView alloc]initWithTitle:@"警告" message:@"账号 密码输入错误" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确认", nil];
        [self.alertview show];        
    }
}

// 找回密码button的click方法
-(void)click2:(UIButton *)button
{
    // 创建一个secondVC的对象
    PasswordViewController *passwordVC=[[PasswordViewController alloc]init];    
    // 设置跳转时候的动画效果    
    [passwordVC setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];
        // 进行跳转
    [self presentViewController:passwordVC animated:YES completion:^{       
    }];
    // 内存管理
    [passwordVC release];    
}

// 注册button的click方法
-(void)click3:(UIButton *)button
{
    // 创建一个secondVC的对象
    RegistViewController *registVC=[[RegistViewController alloc]init];   
    // 设置跳转时候的动画效果  
    [registVC setModalTransitionStyle:UIModalTransitionStyleCoverVertical];
    // 进行跳转
    [self presentViewController:registVC animated:YES completion:^{
  }];
    // 内存管理
    [registVC release];
}

// 显示密码的button方法
-(void)click4:(UIButton *)button
{
    UITextField *textField=(UITextField *)[self.view viewWithTag:2];
    if (self.isChecked) {
        [button setBackgroundImage:[UIImage imageNamed:@"BtnOn.png"] forState:UIControlStateNormal];
        [button sizeToFit];
        textField.secureTextEntry=NO;     
    }else{
        [button setBackgroundImage:[UIImage imageNamed:@"BtnOff.png"] forState:UIControlStateNormal];
        textField.secureTextEntry=YES;  
    }
    self.isChecked=!self.isChecked;
}

界面如下
![这里写图片描述](http://img.blog.csdn.net/20150806211201408)

LoginViewController.m

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    UIColor *bgColor=[UIColor colorWithPatternImage:[UIImage imageNamed:@"2.png"]];
    [self.view setBackgroundColor:bgColor];


    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame=CGRectMake(100, 100, 200, 30);
    button.layer.borderWidth=1;
    button.layer.cornerRadius=10;
    [self.view addSubview:button];
    [button setTitle:@"登陆成功  返回上一界面" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];
}

-(void)click:(UIButton *)button
{
    [self dismissViewControllerAnimated:YES completion:^{        
    }];
}

![这里写图片描述](http://img.blog.csdn.net/20150806211353921)

![这里写图片描述](http://img.blog.csdn.net/20150806211449970)

RegistViewController.m

#import "RegistViewController.h"
#import "LTView.h"
#define HEIGHT self.view.frame.size.height
@interface RegistViewController ()<UITextFieldDelegate>

@property(nonatomic,assign)BOOL isChecked;


@end

@implementation RegistViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    UIColor *bgColor=[UIColor colorWithPatternImage:[UIImage imageNamed:@"7.jpg"]];
    [self.view setBackgroundColor:bgColor];

    LTView *view1=[[LTView alloc]init];
    view1.frame=CGRectMake(0, 100, 375, 30);
    [self.view addSubview:view1];
    view1.label.text=@"账户名";
    view1.textField.clearButtonMode=YES;
    view1.textField.placeholder=@"请输入账户名";
    view1.textField.returnKeyType = UIReturnKeyNext;
    view1.textField.tag=1;
    [view1.textField addTarget:self action:@selector(nameTextField_DidEndOnExit:) forControlEvents:UIControlEventTouchUpInside];
    [view1 release];

    LTView *view2=[[LTView alloc]initWithFrame:CGRectMake(0, 150, 375, 30)];
    [self.view addSubview:view2];
    view2.label.text=@"密码";
    view2.textField.clearButtonMode=UITextFieldViewModeAlways;
    view2.textField.placeholder=@"请输入账户名";
    view2.textField.secureTextEntry=YES;
    view2.textField.tag=2;
    [view2 release];

    LTView *view3=[[LTView alloc]init];
    view3.frame=CGRectMake(0, 200, 375, 30);
    [self.view addSubview:view3];
    view3.label.text=@"确认密码";
    view3.textField.clearButtonMode=UITextFieldViewModeAlways;
    view3.textField.placeholder=@"请输入密码";
    view3.textField.secureTextEntry=YES;
    view3.textField.tag=3;
    [view3 release];

    LTView *view4=[[LTView alloc]init];
    view4.frame=CGRectMake(0, 250, 375, 30);
    [self.view addSubview:view4];
    view4.label.text=@"手机号";
    view4.textField.clearButtonMode=UITextFieldViewModeAlways;
    view4.textField.placeholder=@"请输入手机号";
    view4.textField.keyboardType = UIKeyboardTypeNumberPad;
    view4.textField.tag=4;
    [view4 release];

    LTView *view5=[[LTView alloc]init];
    view5.frame=CGRectMake(0, 300, 375, 30);
    [self.view addSubview:view5];
    view5.label.text=@"邮箱";
    view5.textField.clearButtonMode=UITextFieldViewModeAlways;
    view5.textField.placeholder=@"请输入邮箱地址";
    view5.textField.returnKeyType = UIReturnKeyDone;
    view5.textField.keyboardType = UIKeyboardTypeEmailAddress;
    view5.textField.delegate=self;
    view5.textField.tag=5;
    [view5 release];

    // 设置注册和取消button
    UIButton *registButton=[UIButton buttonWithType:UIButtonTypeSystem];
    registButton.frame=CGRectMake(90, 420, 60, 30);
    [registButton setTitle:@"注册" forState:UIControlStateNormal];
    [self.view addSubview:registButton];


    UIButton *QXButton=[UIButton buttonWithType:UIButtonTypeSystem];
    QXButton.frame=CGRectMake(200, 420, 60, 30);
    [QXButton setTitle:@"取消" forState:UIControlStateNormal];
    [self.view addSubview:QXButton];
    [QXButton addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];



    UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(50, 350, 50, 20)];
    [self.view addSubview:label];
    label.text=@"显示密码";
    [label sizeToFit];
    [label release];

    // button
    UIButton *button=[UIButton buttonWithType:UIButtonTypeSystem];
    button.frame=CGRectMake(150, 350, 50, 20);
    [self.view addSubview:button];
    [button setBackgroundImage:[UIImage imageNamed:@"BtnOff.png"] forState:UIControlStateNormal];
    [button sizeToFit];
    [button addTarget:self action:@selector(click4:) forControlEvents:UIControlEventTouchUpInside];

    self.isChecked=YES;    
}


// 显示密码的button方法
-(void)click4:(UIButton *)button
{
    UITextField *textField1=(UITextField *)[self.view viewWithTag:3];
    UITextField *textField2=(UITextField *)[self.view viewWithTag:4];
    if (self.isChecked) {
        [button setBackgroundImage:[UIImage imageNamed:@"BtnOn.png"] forState:UIControlStateNormal];
        [button sizeToFit];
        textField1.secureTextEntry=NO;
        textField2.secureTextEntry=NO;       
    }else{
        [button setBackgroundImage:[UIImage imageNamed:@"BtnOff.png"] forState:UIControlStateNormal];
        textField1.secureTextEntry=YES;
        textField2.secureTextEntry=YES;        
    }
    self.isChecked=!self.isChecked;    
}

// 使view往上走
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
    if (textField.frame.origin.y > HEIGHT /2) {
        CGFloat height=textField.frame.origin.y - HEIGHT/2;
        self.view.center=CGPointMake(self.view.center.x, self.view.center.y - height);
    }
    return YES;
}

// 等到编译结束的时候,再让他回到原位
-(BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
    if (textField.frame.origin.y > HEIGHT / 2) {
        CGFloat height = textField.frame.origin.y - HEIGHT / 2;
        self.view.center = CGPointMake(self.view.center.x, self.view.center.y + height);
    }
    return YES;
}


// 取消的点击方法
-(void)click:(UIButton *)button
{
    [self dismissViewControllerAnimated:YES completion:^{        
    }];
}


![这里写图片描述](http://img.blog.csdn.net/20150806211552272)

PasswordViewController.m

#import "PasswordViewController.h"

@interface PasswordViewController ()<UITextFieldDelegate>

@end

@implementation PasswordViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    UIColor *bgColor=[UIColor colorWithPatternImage:[UIImage imageNamed:@"aa18972bd40735fa735032ab9a510fb30f24087b.jpg"]];
    [self.view setBackgroundColor:bgColor];
    // 设置一个textfield
    UITextField *textField=[[UITextField alloc]initWithFrame:CGRectMake(80, 100, 200, 30)];
    [self.view addSubview:textField];
    textField.layer.borderWidth=1;
    textField.layer.cornerRadius=10;
    textField.placeholder=@"请输入邮箱";
    textField.keyboardType=UIKeyboardTypeEmailAddress;
    textField.returnKeyType = UIReturnKeyDone;
    textField.alpha=0.3;
    textField.delegate=self;
    [textField release];

    //设置两个button
    UIButton *button1=[UIButton buttonWithType:UIButtonTypeSystem];
    button1.frame=CGRectMake(90, 170, 70, 30);
    [self.view addSubview:button1];
    [button1 setTitle:@"找回" forState:UIControlStateNormal];

    UIButton *button2=[UIButton buttonWithType:UIButtonTypeSystem];
    button2.frame=CGRectMake(200, 170, 70, 30);
    [self.view addSubview:button2];
    [button2 setTitle:@"取消" forState:UIControlStateNormal];
    [button2 addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside]; 
}

// 点击return回收键盘
-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];
    return YES;
}
-(void)click:(UIButton *)button
{
    [self dismissViewControllerAnimated:YES completion:^{
    }];
}


![这里写图片描述](http://img.blog.csdn.net/20150806211638858)