UISB XIB登陆例子

VCRoot.h

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface VCRoot : UIViewController
//XIB创建UILabel属性

//IBOutlet属性是在XIB中创建的
@property (weak, nonatomic) IBOutlet UILabel *mUserName;

//密码属性
@property (weak, nonatomic) IBOutlet UILabel *mUserPassword;

//输入对话框属性
@property (weak, nonatomic) IBOutlet UITextField *mTFUserName;

@property (weak, nonatomic) IBOutlet UITextField *mTFPassword;

//按钮
@property (weak, nonatomic) IBOutlet UIButton *mBTLogin;

@property (weak, nonatomic) IBOutlet UIButton *mBTRegister;

//按钮函数事件同步
- (IBAction)pressLogin:(UIButton *)sender;

- (IBAction)pressRegister:(id)sender;



@end

Root.m

- (IBAction)pressRegister:(id)sender {
    NSString* uName = @"michael";
    NSString* uPass=@"123456";
    if([_mTFUserName.text isEqual:uName] && [_mTFPassword.text isEqual:uPass]){
        NSLog(@"登录成功");
        
    }else
    {
        
        NSLog(@"登陆失败");
        
    }
    
    
    
    
}

- (IBAction)pressLogin:(UIButton *)sender {
}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    [_mTFUserName resignFirstResponder];
    [_mTFPassword resignFirstResponder];
    
}

sceneDelegate.m

#import "SceneDelegate.h"
#import "VCRoot.h"
@interface SceneDelegate ()

@end

@implementation SceneDelegate


- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {
    self.window = [[UIWindow alloc] initWithWindowScene:(UIWindowScene *)scene];
    self.window.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height);
    
    VCRoot* root=[[VCRoot alloc]init];
    
    //对窗口的根视图控制器进行赋值操作 属于windows属性
    //整个UIKit框架中只有一个根视图控制器 属于windows的属性
    //视图控制器用来管理界面和处理界面逻辑类对象

    //程序启动前必须对根视图控制器赋值
    
    self.window.rootViewController=root;
    
    //将windos作为主视图并且显示出来
    [self.window makeKeyAndVisible];
    
    
  
}