CTMediator实践总结

需求 

在 ViewController ，点击按钮跳向 A2ViewController ，并传参 name=我 （正向传值）

在 A2ViewController ，点击屏幕，跳回 ViewController ，并传参 city=北京 （反向传值）

基于CTMediator的组件化方案，有哪些核心组成？

• CTMediator中间件：集成就可以了

• 模块Target_module：模块的实现及提供对外的方法调用Action_methodName，需要传参数时，都统一以NSDictionary*的形式传入。

• CTMediator+module分类：扩展里声明了模块业务的对外接口，参数明确，这样外部调用者可以很容易理解如何调用接口。

导入三方库 CTMediator https://github.com/casatwy/CTMediator

创建 CTMediator 的分类 

CTMediator+A.h

@interface CTMediator (A)
- (UIViewController *)A2WithName:(NSString *)name callBack:(void (^) (NSDictionary *info))callBack;
@end

CTMediator+A.m

@implementation CTMediator (A)

- (UIViewController *)A2WithName:(NSString *)name callBack:(void (^) (NSDictionary *info))callBack{
    NSMutableDictionary * parameters = [NSMutableDictionary dictionary];
    parameters[@"name"] = name;
    parameters[@"callBack"] = callBack;
    return [self performTarget:@"A" action:@"A2" params:parameters shouldCacheTarget:NO];
}
@end

创建 Target_A 对象

Target_A.h

@interface Target_A : NSObject
- (UIViewController *)Action_A2:(NSDictionary *)parameters;
@end

Target_A.m

@implementation Target_A

- (UIViewController *)Action_A2:(NSDictionary *)parameters{
    A2ViewController * secondVC = [A2ViewController new];
    secondVC.name = parameters[@"name"];
    secondVC.callBack = parameters[@"callBack"];
    return secondVC;
}
@end

正向传值

    UIViewController * vc = [[CTMediator sharedInstance] A2WithName:@"我" callBack:^(NSDictionary * _Nonnull info) {
        NSLog(@"回调了%@",info);
    }];
    if (vc) {
        [self presentViewController:vc animated:YES completion:nil];
    }

反向传值

@interface A2ViewController : UIViewController
@property (nonatomic, copy) NSString * name;
@property (nonatomic, copy) void (^callBack) (NSDictionary *info);

@end

回调

    if (self.callBack) {
        self.callBack(@{@"city":@"北京"});
    }
    [self dismissViewControllerAnimated:YES completion:nil];