OC项目之使用MVC架构模式进行开发

我们在开发一个OC项目时，常常会用到MVC架构模式。

Model层是模型层，负责提供页面上的数据。

举个🌰说明：

RFTestModel.h

#import "RFBaseModel.h"

NS_ASSUME_NONNULL_BEGIN

@interface RFTestModel : RFBaseModel

@end

NS_ASSUME_NONNULL_END

 

RFTestModel.m

#import "RFTestModel.h"

@implementation RFTestModel

@end

 

View层是视图层，负责绘制页面视图。

RFTestView.h

#import "RFBaseView.h"
#import "RFTableView.h"
#import "RFTestModel.h"

NS_ASSUME_NONNULL_BEGIN

@interface RFTestView : RFTableView

@end

typedef void (^mapBtnBlock)(void);
@interface RFTestHeaderView : RFBaseView
    @property (nonatomic, copy) mapBtnBlock mapBtnClick;
@end
NS_ASSUME_NONNULL_END

其中，Block可以定义在视图层的声明文件：

typedef void (^mapBtnBlock)(void);
@interface RFTestHeaderView : RFBaseView
    @property (nonatomic, copy) mapBtnBlock mapBtnClick;
@end

上述代码定义了一个名为mapBtnBlock的Block，并使用它定义了mapBtnClick作为视图的属性。

 

RFTestView.m

#import "RFTestView.h"


@implementation RFTestView


@end

@interface RFTestHeaderView ()
@property (nonatomic, strong) RFButton *mapBtn;
@end

@implementation RFTestHeaderView

-(instancetype)initWithFrame:(CGRect)frame{
    if (self = [super initWithFrame:frame]) {
        self.backgroundColor = RF_RGB_COLOR(0, 0, 255);
        UILabel* label = [[UILabel alloc]init];
        [self addSubview:label];
        [label mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerX.equalTo(self.mas_centerX);
            make.top.equalTo(self.mas_top).offset(100);
            make.size.mas_equalTo(CGSizeMake(200, 50));
        }];
        label.backgroundColor = [UIColor greenColor];
        
        UIButton* btn = [UIButton buttonWithType:UIButtonTypeCustom];
        [self addSubview:btn];
        [btn mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerX.equalTo(label);
            make.top.equalTo(label.mas_bottom).offset(100);
            make.size.mas_equalTo(CGSizeMake(200,50));
        }];
        btn.backgroundColor = [UIColor yellowColor];
        
        [btn setTitle:@"更新约束" forState:(UIControlStateNormal)];
        [btn addTarget:self action:(@selector(pressBtn:)) forControlEvents:(UIControlEventTouchUpInside)];
        [btn setTitleColor:[UIColor blackColor] forState:(UIControlStateNormal)];
        
        UIView* view = [[UIView alloc]init];
        [view setBackgroundColor:[UIColor redColor]];
        [self addSubview:view];
        [view mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerX.equalTo(self.mas_centerX);
            make.top.equalTo(btn.mas_bottom).offset(30);
            make.size.mas_equalTo(CGSizeMake(300, 300));
        }];
        
        _mapBtn =  [RFButton buttonWithType:UIButtonTypeCustom];
        [self addSubview:_mapBtn];
        
        [_mapBtn mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerY.equalTo(self.mas_centerY);
            make.right.equalTo(self.mas_right).offset(-15.0f);
            make.height.mas_equalTo(200.0f);
                [_mapBtn setTitle:@"打印机分布" forState:UIControlStateNormal];
            [_mapBtn setTitleColor:RF_RGB_COLOR(0, 0, 0) forState:UIControlStateNormal];
            [[_mapBtn rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(__kindof UIControl * _Nullable x) {
                if (self.mapBtn){
                    
                    self.mapBtnClick();
                    
                }
            }];
        }];
    }
    return self;
}

-(void)pressBtn:(UIButton*)btn{
    [btn mas_updateConstraints:^(MASConstraintMaker *make) {
        make.size.mas_equalTo(CGSizeMake(300,100));
    }];
}
@end

上述代码自定义initWithFrame函数，使用Masonry，新建组件、加入到父视图、生成组件约束。

上述代码添加了label、button、view和button。第二个按钮则增加了事件，使用了ReactiveObjC，当按钮被点击时，会调用mapBtnClick块。

可以在组件上增加事件，并触发对应的函数，进行视图的修改。

 

RFTestViewController.h

#import "RFBaseViewController.h"

NS_ASSUME_NONNULL_BEGIN

@interface RFTestViewController : RFBaseViewController

@end

NS_ASSUME_NONNULL_END

 

RFTestViewController.m

#import "RFTestView.h"
#import "RFTestViewController.h"
#import "RFPrinterMapViewController.h"

@interface RFTestViewController ()

@property (nonatomic, strong) RFTestHeaderView *headerView;

@property (nonatomic, strong) RFButton *mapBtn;

@end

@implementation RFTestViewController

- (void)viewDidLoad {
    
    [super viewDidLoad];
    
    self.title = @"会议助手";
    
    [self initUI];
}

- (void)initUI{
    _headerView = [[RFTestHeaderView alloc] initWithFrame:CGRectZero];
    [self.view addSubview:_headerView];
    [_headerView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.left.right.equalTo(self.view);
        make.height.mas_equalTo(400.0f);
    }];
    
    RF_WEAKILY(self);
    
    _headerView.mapBtnClick = ^{
        
        RF_STRONGIFY(self);
        RFPrinterMapViewController *vc = [[RFPrinterMapViewController alloc]init];
        [self.navigationController pushViewController:vc animated:YES];
    
    };
}

ViewController是页面的入口，viewDidLoad作为页面加载的hook函数被调用。在这个函数中可以进行UI的初始化。

构建View并进行View的摆放。同时，视图内触发的Block会在这里回调处理，可以跳转到其他视图的ViewController。

在Block外需要进行weakify，进入Block需要进行strongify。