IOS-学习记录【01】

//
//  ViewController.m
//  more
//
//  Created by vjia on 2017/8/1.
//  Copyright ? 2017年 vjia. All rights reserved.
//

#import "ViewController.h"
#import "UIKit/UIkit.h"

@interface ViewController (){
    UITextField *_txtUserName;//声明控件变量
    UITextField *_txtPassword;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self LoadLoginForm];//在当前对象中加载
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(void)LoadLoginForm{//实例化加载控件
    UILabel *lbUserName=[[UILabel alloc] initWithFrame:CGRectMake(20, 160, 100, 40)];//绘制文本框大小
    lbUserName.text=@"用户名：";//设置文本框文字
    [self.view addSubview:lbUserName];
    
    _txtUserName=[[UITextField alloc] initWithFrame:CGRectMake(80, 160, 280, 40)];//绘制文本框大小
    [_txtUserName setBorderStyle:UITextBorderStyleRoundedRect];//设置边框样式
    _txtUserName.layer.borderColor=[[UIColor grayColor] CGColor];//设置边框的颜色
    _txtUserName.layer.borderWidth=0.7f;//设置边框宽度
    _txtUserName.layer.cornerRadius=6.0f;//设置圆角边框大小
    _txtUserName.placeholder=@"请输入用户名";
    _txtUserName.clearButtonMode=UITextFieldViewModeAlways;//文本框右侧总是显示删除角标
    [self.view addSubview:_txtUserName];//将控件加入当前的view中
    
    UILabel *lbPassWord=[[UILabel alloc] initWithFrame:CGRectMake(20, 220, 100,40)];
    lbPassWord.text=@"密码：";
    [self.view addSubview:lbPassWord];
    
    _txtPassword=[[UITextField alloc] initWithFrame:CGRectMake(80, 220, 280, 40)];
    [_txtPassword setBorderStyle:UITextBorderStyleRoundedRect];
    _txtPassword.layer.borderColor=[[UIColor grayColor] CGColor];
    _txtPassword.layer.borderWidth=0.7f;
    _txtPassword.layer.cornerRadius=6.0f;
    _txtPassword.placeholder=@"请输入密码";
    _txtPassword.clearButtonMode=UITextFieldViewModeAlways;
    [self.view addSubview:_txtPassword];
    
    UILabel *lbForget=[[UILabel alloc] initWithFrame:CGRectMake(20, 280, 100, 50)];
    lbForget.text=@"忘记密码?";
    [lbForget setTextColor:[UIColor blueColor]];
    [self.view addSubview:lbForget];
    
    UILabel *lbReg=[[UILabel alloc]initWithFrame:CGRectMake(320, 280, 100, 50)];
    lbReg.text=@"注 册";
    [lbReg setTextColor:[UIColor redColor]];//设置字体的颜色
    [self.view addSubview:lbReg];
    
    CGRect rect=[[UIScreen mainScreen] bounds];//获取主屏幕对象
    CGSize size=rect.size;//屏幕大小
    CGFloat width=size.width;//宽度
    
    UIButton *btnLogin=[UIButton buttonWithType:UIButtonTypeCustom];//如果按钮需要自定义背景图片 按钮必须设置成自定义模式 否则会看见蓝色的图标
    btnLogin.frame=CGRectMake(0,400, width, 80+10);
    //[btnLogin setBackgroundColor:[UIColor redColor]];//设置背景颜色为红色
    [btnLogin setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [btnLogin setTitle:@"登 录" forState:UIControlStateNormal];
    [btnLogin.self addTarget:self action:@selector(login) forControlEvents:UIControlEventTouchUpInside];
    [btnLogin setImage:[UIImage imageNamed:@"SourceBundle.bundle/login"] forState:UIControlStateNormal];//引用资源文件中的图片作为背景图
    [btnLogin setImageEdgeInsets:UIEdgeInsetsMake(0, 25, 20, 25)];
    [self.view addSubview:btnLogin];
    
    UINavigationBar *navigationbar=[[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, width, 50+10)];//绘制导航
    [self.view addSubview:navigationbar];//加入到当前的view中
    
    UINavigationItem *navitem=[[UINavigationItem alloc] initWithTitle:@"登录"];//创建导航内容并设置标题
    
    UIBarButtonItem *barbutton=[[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStyleDone target:self action:@selector(login)];//在导航栏上创建一个按钮 文字为返回 加入触发事件的方法
    
    navitem.leftBarButtonItem=barbutton;//按钮显示在导航栏的左侧
    
    [navigationbar pushNavigationItem:navitem animated:NO];//将导航栏显示出来
}

-(void)login{//登录方法
    NSString *message=[NSString stringWithFormat:@"户名 %@ 密码 %@",_txtUserName.text,_txtPassword.text];//声明一个string类型的变量 并接收文本框的输入的内容
    UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"温馨提示" message:message delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];//初始化弹窗
    [alert show];//弹出模态窗体提示
    
    
}
@end