MVVM
所谓mvvm就是在mvc的基础上将业务逻辑抽离出来放到viewModel中,如下:
1:model层，API请求的原始数据.
2:view层，视图展示，由viewController来控制.
3:viewModel层，负责业务处理和数据转化.
接下来就具体实现MVVM模式:
1:使用AFNetWorking封装数据请求类:BaseNetWork.h
`+(id)POST:(NSString *)urlStr paramenters:(NSDictionary *)parameters completionHandler:(void(^)(id responseObj,NSError *error))completionHandler;`
`BaseNetWork.m
+(id)POST:(NSString *)urlStr paramenters:(NSDictionary *)parameters completionHandler:(void(^)(id responseObj,NSError *error))completionHandler{
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html", @"application/json", @"text/json", @"text/javascript", @"text/plain", nil];
return [manager POST:urlStr parameters:parameters progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {
NSLog(@"%@", task.currentRequest.URL.absoluteString);
!completionHandler?:completionHandler(responseObject, nil);
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
NSLog(@"%@", task.currentRequest.URL.absoluteString);
NSLog(@"%@", error);
!completionHandler ?: completionHandler(nil, error);
}];
}`
2：创建数据模型
#import "LoginModel.h"
3:基于afn基础类的对接口和模型进行封
例如：NetWorkRequest.h
`#import "BaseNetWork.h"
#import "LoginModel.h"
@interface NetWorkRequest : BaseNetWork
+(id)getLoginStatusWith:(NSString*)userName andPassword:(NSString*)password andToken:(NSString*)token andRegistration_id:(NSString*)registration_id completionHandler:(void(^)(LoginModel *model,NSError *error))completionHandler;
@end`
NetWorkRequest.m中实现
#import "NetWorkRequest.h"
#define ADDRESSURL @"http://xgdj.szlcnet.com/index.php?m=Courier&c=User&a=login"
@implementation NetWorkRequest
+(id)getLoginStatusWith:(NSString*)userName andPassword:(NSString*)password andToken:(NSString*)token andRegistration_id:(NSString*)registration_id completionHandler:(void(^)(LoginModel *model,NSError *error))completionHandler{
NSString *netPath = ADDRESSURL;
NSDictionary *parameter = @{@"user_name":userName,@"password":password,@"token":token,@"registration_id":registration_id};
return [self POST:netPath paramenters:parameter completionHandler:^(id responseObj, NSError *error) {
!completionHandler ?: completionHandler([LoginModel parse:responseObj],error);
}];
}
@end
4:创建viewModel的基础类如
BaseViewModel.h
//请求状态
typedef NS_ENUM(NSUInteger, RequestMode) {
RequestModeRefresh,
RequestModeMore,
};
@interface BaseViewModel : NSObject
@property (nonatomic) NSURLSessionDataTask *dataTask;
- (void)getDataWithMode:(RequestMode)requestMode completionHandler:(void(^)(NSError *error))completionHandler;
@end
BaseViewModel.m
#import "BaseViewModel.h"
@implementation BaseViewModel
- (void)getDataWithMode:(RequestMode)requestMode completionHandler:(void (^)(NSError *))completionHandler{
}
@end
5:创建相应的借口VIewModel
例如登入借口model
LoginViewModel.h在这里需要将请求接口中所需传的字段暴露出来
#import "BaseViewModel.h"
#import "NetWorkRequest.h"
#import "LoginModel.h"
#import "BaseViewModel.h"
@interface LoginViewModel : BaseViewModel
@property (nonatomic) LoginModel *data;
@property (nonatomic) NSString *username;
@property (nonatomic) NSString *password;
@property (nonatomic) NSString *token;
@property (nonatomic) NSString *registration_id;
- (NSInteger)loginStatusCode;
- (NSString*)tokenForLoginInformation;
@end
在.m中可以实现
#import "LoginViewModel.h"
@implementation LoginViewModel
-(void)getDataWithMode:(RequestMode)requestMode completionHandler:(void (^)(NSError *))completionHandler{
self.dataTask = [NetWorkRequest getLoginStatusWith:self.username andPassword:self.password andToken:self.token andRegistration_id:self.registration_id completionHandler:^(LoginModel *model, NSError *error) {
if (!error) {
self.data = model;
}
!completionHandler ?: completionHandler(error);
}];
}
- (NSString *)tokenForLoginInformation
{
return self.data.result.token;
}
- (NSInteger)loginStatusCode
{
return self.data.status;
}
@end
6：在控制器中实现借口逻辑拿到数据处理业务
如下
#import "ViewController.h"
#import "LoginViewModel.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
LoginViewModel *viewModel = [[LoginViewModel alloc]init];
//实现请求接口中所需要传的字段
viewModel.username = @"123456";
viewModel.password = @"123456";
viewModel.token = @"";
viewModel.registration_id =@"";
[SVProgressHUD showWithStatus:@"正在获取用户信息……" maskType:SVProgressHUDMaskTypeBlack];
[viewModel getDataWithMode:RequestModeRefresh completionHandler:^(NSError *error) {
[SVProgressHUD dismiss];
//在此处可以拿到数据并处理逻辑业务
NSLog(@"%@",[viewModel tokenForLoginInformation]);
}];
}
@end