(纯代码)QQ登录界面：

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic, weak) UITextField *_textName;
@property (nonatomic, weak) UITextField *_textPassword;

@endhttp://www.cnblogs.com/pocket-mood/p/4331303.html

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    /** QQ */
    UILabel *labName = [[UILabel alloc] init];
    labName.frame = CGRectMake(15, 71, 40, 15);
    labName.text = @"QQ :";
    labName.textColor = [UIColor blueColor];
    [self.view addSubview:labName];
    
    /** 密码 */
    UILabel *labPassword = [[UILabel alloc] init];
    labPassword.frame = CGRectMake(15, 116, 40, 15);
    labPassword.text = @"密码:";
    labPassword.textColor = [UIColor redColor];
    [self.view addSubview:labPassword];
    
    /** QQ文本 */
    UITextField *textName = [[UITextField alloc] init];
    textName.frame = CGRectMake(60, 55, 260, 40);
    // 设置文本框样式（圆角矩形）
    textName.borderStyle = UITextBorderStyleRoundedRect;
    // 设置文本框在没内容时显示的占位格内容
    textName.placeholder = @"请输入QQ号";
    textName.textColor = [UIColor blackColor];
    // 设置键盘为数字键盘输入
    textName.keyboardType = UIKeyboardTypeNumberPad;
    // 设置编辑时右侧出现全部删除图标
    textName.clearButtonMode = UITextFieldViewModeWhileEditing;
    [self.view addSubview:textName];
    // 为了使_textName以后可以调用控件属性
    self._textName = textName;
    
    /** 密码文本 */
    UITextField *textPassword = [[UITextField alloc] init];
    textPassword.frame = CGRectMake(60, 100, 260, 40);
    textPassword.borderStyle = UITextBorderStyleRoundedRect;
    textPassword.placeholder = @"请输入密码";
    textPassword.textColor = [UIColor redColor];
    // 设置文本为密码状态，文本全部转化为点显示
    textPassword.secureTextEntry = YES;
    textPassword.clearButtonMode = UITextFieldViewModeWhileEditing;
    [self.view addSubview:textPassword];
    self._textPassword = textPassword;
    
    /** 登录按钮 */
    UIButton *btnRegiste = [[UIButton alloc] init];
    btnRegiste.frame = CGRectMake(15, 290, 300, 60);
    [btnRegiste setTitle:@"登录" forState:UIControlStateNormal];
    [btnRegiste setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [btnRegiste setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
    [btnRegiste setBackgroundColor:[UIColor blueColor]];
     // 设置Button按钮文本字体样式和大小
    btnRegiste.titleLabel.font = [UIFont fontWithName:@"Arial" size:28.0];
    // 监听事件的触发
    [btnRegiste addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btnRegiste];
    
}

// 监听

- (void) btnClick: (UIButton *) button
{
    NSLog(@"－－－－登录－－－－\nQQ：%@\n密码：%@",self._textName.text,self._textPassword.text);
    
    // 退出键盘状态
    [self.view endEditing:YES];
}



@end