本文主要是介绍【iOS】MVC模式,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
MVC模式
- MVC模式
- MVC模式demo
MVC模式
MVC模式全称为model(模型)view(视图)controller(控制器),他分为三个不同的层分别负责不同的职责。
- View:该层用于存放视图,该层中我们可以对页面及控件进行布局。
- Model:模型一般都拥有很好的可复用性,在该层中,我们可以统一管理一些数据。
- Controlller:该层充当一个CPU的功能,即该应用程序所有的工作都由Controller统一管调控,他负责处理View和Model的事件。
MVC模式降低了各个环节耦合性,优化了Controller中的代码量。
MVC模式中各个层级之间的关系图:
在这个图中,我们可以看出,Model层和View层之间并不会进行直接通信,他们之间是依靠Controller进行通信的。
流程:
点击view,视图响应事件,而后通过代理传递事件到Controller,发起网络请求更新model,model处理完数据,代理或通知给Controller,改变视图样式,完成操作。
MVC模式demo
这里我写了一个登陆注册的demo来学习MVC模式的具体使用。
下面展示我登陆界面的代码:
LandModel:
#import <Foundation/Foundation.h>NS_ASSUME_NONNULL_BEGIN@interface LandModel : NSObject
@property (nonatomic, copy) NSMutableArray* arr1;
@property (nonatomic, copy) NSMutableArray* arr2;
-(void) InitArray;
@endNS_ASSUME_NONNULL_END
#import "LandModel.h"@implementation LandModel
-(void) InitArray
{_arr1 = [[NSMutableArray alloc] init];_arr2 = [[NSMutableArray alloc] init];
}
@end
LandView:
#import <UIKit/UIKit.h>NS_ASSUME_NONNULL_BEGIN@interface LandView : UIView
@property (nonatomic, retain) UITextField* textUser;
@property (nonatomic, retain) UITextField* textPassword;
@property (nonatomic, strong) UIButton* btn1;
@property (nonatomic, strong) UIButton* btn2;
-(void) InitButtonAndText;
@endNS_ASSUME_NONNULL_END
#import "LandView.h"@implementation LandView
- (void)InitButtonAndText
{self.textUser = [[UITextField alloc] initWithFrame:CGRectMake(50, 160, 300, 40)];self.textUser.borderStyle = UITextBorderStyleRoundedRect; self.textUser.placeholder = @"请输入账号";[self addSubview:self.textUser];_textPassword = [[UITextField alloc] initWithFrame:CGRectMake(50, 230, 300, 40)];self.textPassword.borderStyle = UITextBorderStyleRoundedRect;self.textPassword.placeholder = @"请输入密码";[self addSubview:self.textPassword];_btn1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];_btn1.frame = CGRectMake(50, 350, 80, 50);[_btn1 setTitle:@"登陆" forState:UIControlStateNormal];_btn1.tintColor = [UIColor blackColor];[self addSubview:_btn1];_btn2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];_btn2.frame = CGRectMake(170, 350, 80, 50);[_btn2 setTitle:@"注册" forState:UIControlStateNormal];_btn2.tintColor = [UIColor blackColor];[self addSubview:_btn2];
}@end
ViewController:
#import <UIKit/UIKit.h>
#import "LandModel.h"
#import "LandView.h"
#import "RegistViewController.h"@interface ViewController : UIViewController<SendDelegate>
@property (nonatomic, strong) LandView* landview;
@property (nonatomic, strong) LandModel* landmodel;
@property (nonatomic, strong) RegistViewController* regist;
@property (nonatomic, retain) UIAlertController* alert;@end
#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];_landview = [[LandView alloc] init];_landmodel = [[LandModel alloc] init];[self.view addSubview:_landview];[_landmodel InitArray];[_landview InitButtonAndText];[_landview.btn1 addTarget:self action:@selector(login) forControlEvents:UIControlEventTouchUpInside];[_landview.btn2 addTarget:self action:@selector(regist1) forControlEvents:UIControlEventTouchUpInside];
}-(void) login
{for(int i = 0; i < _landmodel.arr1.count; i++) {if([_landview.textUser.text isEqualToString:_landmodel.arr1[i]]&& [_landview.textPassword.text isEqualToString:_landmodel.arr2[i]]) {self.alert = [UIAlertController alertControllerWithTitle:@"提示" message:@"登陆成功" preferredStyle:UIAlertControllerStyleAlert];UIAlertAction *confirmAction = [UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {}];[self.alert addAction:confirmAction];[self presentViewController:self.alert animated:YES completion:nil];} else {self.alert = [UIAlertController alertControllerWithTitle:@"提示" message:@"用户名或密码错误" preferredStyle:UIAlertControllerStyleAlert];UIAlertAction *confirmAction = [UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {}];[self.alert addAction:confirmAction];[self presentViewController:self.alert animated:YES completion:nil];}}
}-(void) regist1
{if(!_regist) {_regist = [[RegistViewController alloc] init];}_regist.delegate = self;[self presentViewController:_regist animated:YES completion:nil];
}
- (void)send:(NSMutableArray *)arruser password:(NSMutableArray *)password {_landModel.arr1 = [NSMutableArray arrayWithArray:aarruser];_landModel.arr2 = [NSMutableArray arrayWithArray:password];
}@end
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