ViewController 代码拆分实践

(BOOL )application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];

ViewController *viewController = [[ViewController alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc]initWithRootViewController:viewController];
self.window.rootViewController = navigationController;

[self.window makeKeyAndVisible];

return YES;
}
ViewController.m
@interface ViewController ()<NSURLConnectionDataDelegate,UITableViewDataSource,UITableViewDelegate>

@property (nonatomic, strong ) NSMutableData *receiveData;
@property (nonatomic, strong ) NSArray *hotList;

@property (nonatomic, strong ) UITableView *tableView;
@end

@implementation ViewController

(void )viewDidLoad {
[super viewDidLoad];

self.hotList = [NSKeyedUnarchiver unarchiveObjectWithFile:[NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES )[0] stringByAppendingPathComponent:@".hotListArchiver"]];
[self.tableView reloadData];

self.receiveData = [[NSMutableData alloc]init];
NSURL *url = [[NSURL alloc]initWithString:@"https://www.v2ex.com/api/topics/hot.json"];
NSURLRequest *request = [[NSURLRequest alloc]initWithURL:url];
NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];

CGRect frame = [[UIScreen mainScreen]bounds];
self.tableView = [[UITableView alloc]initWithFrame:frame];
self.tableView.delegate = self;
self.tableView.dataSource = self;
[self.view addSubview:self.tableView];
}
(NSInteger )tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger )section
{
return self.hotList.count;
}
(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = @"cellIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (!cell ) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:cellIdentifier];
}

cell.textLabel.text = self.hotList[indexPath.row][@"title"];
cell.imageView.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[NSString stringWithFormat:@"http:%@",self.hotList[indexPath.row][@"member"][@"avatar_mini"]]]]];
return cell;
}
(void )connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[self.receiveData appendData:data];
}
(void )connectionDidFinishLoading:(NSURLConnection *)connection
{
NSError *error = nil;
self.hotList = [NSJSONSerialization JSONObjectWithData:self.receiveData options:NSJSONReadingAllowFragments error:&error];
[self.tableView reloadData];

NSLog (@"hotList\n%@",self.hotList );
[NSKeyedArchiver archiveRootObject:self.hotList toFile:[NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES )[0] stringByAppendingPathComponent:@".hotListArchiver"]];
}
DetailViewController.h
@interface DetailViewController : UIViewController

@property (nonatomic, strong ) NSDictionary *detailData;
@end
DetailViewController.m
@implementation DetailViewController

-(void )viewDidLoad
{
self.title = self.detailData[@"title"];
}

@end
```
代码运行效果：
ViewController

DetailViewController

下面，我们开始拆。

首先，创建接口 Interface 。

创建接口 Interface

然后，创建相应的类。

创建相应的类

把代码移到相应的类里：
ViewController.h
```
@interface ViewController : UIViewController

@property (nonatomic, weak ) id<ViewInterface> viewModel;
@property (nonatomic, weak ) id<APIInterface> apiHandle;
@property (nonatomic, weak ) id<StoreInterface> storeHandle;
@property (nonatomic, weak ) id<RouteInterface> routeHandle;
@end
ViewController.m
@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>

@property (nonatomic, strong ) NSMutableData *receiveData;
@property (nonatomic, strong ) NSArray *hotList;

@property (nonatomic, strong ) UITableView *tableView;
@end

@implementation ViewController

(void )viewDidLoad {
[super viewDidLoad];

[self initUI];
self.hotList = [self.storeHandle unarchive];
[self tableViewReloadData];
[self.apiHandle loadData];
}
(void )didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}

-(void )initUI
{
self.title = @"最热 10 条";
CGRect frame = [[UIScreen mainScreen]bounds];
self.tableView = [[UITableView alloc]initWithFrame:frame];
self.tableView.delegate = self;
self.tableView.dataSource = self;
[self.view addSubview:self.tableView];
}

(NSInteger )tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger )section
{
return self.hotList.count;
}
(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = @"cellIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (!cell ) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:cellIdentifier];
}
NSDictionary * data =self.hotList[indexPath.row];

return [self.viewModel configureWithCell:cell data:data];
}
(void )tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSDictionary *detailData = self.hotList[indexPath.row];
[self.routeHandle pushDetailInterfaceFromViewController:self detailData:detailData];
}
(void )tableViewReloadData
{
[self.tableView reloadData];
}
(void )hotListWtihData:(NSArray *)data
{
self.hotList = data;

[self tableViewReloadData];
[self.storeHandle archiveWithObject:self.hotList];
}
@end
```

ViewModel.m
```
@implementation ViewModel

(UITableViewCell *)configureWithCell:(UITableViewCell *)cell data:(NSDictionary *)data { cell.textLabel.text = data[@"title"]; cell.imageView.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[NSString stringWithFormat:@"http:%@",data[@"member"][@"avatar_mini"]]]]]; return cell; } @end APIHandle.h @interface APIHandle : NSObject<APIInterface> @property (nonatomic, weak ) id<ViewInterface> viewModel; @end APIHandle.m @interface APIHandle ()<NSURLConnectionDataDelegate>

@property (nonatomic, strong ) NSMutableData *receiveData;
@end

@implementation APIHandle

(void )loadData
{
self.receiveData = [[NSMutableData alloc]init];
NSURL *url = [[NSURL alloc]initWithString:@"https://www.v2ex.com/api/topics/hot.json"];
NSURLRequest *request = [[NSURLRequest alloc]initWithURL:url];
NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];
}
(void )connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[self.receiveData appendData:data];
}
(void )connectionDidFinishLoading:(NSURLConnection *)connection
{
NSError *error = nil;
id data = [NSJSONSerialization JSONObjectWithData:self.receiveData options:NSJSONReadingAllowFragments error:&error];
NSLog (@"data\n%@",data );

[self.viewModel hotListWtihData:data];
}
@end
StoreHandle.m
@implementation StoreHandle
(id )unarchive
{
return [NSKeyedUnarchiver unarchiveObjectWithFile:[NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES )[0] stringByAppendingPathComponent:@".hotListArchiver"]];
}
(void )archiveWithObject:(id )object
{
[NSKeyedArchiver archiveRootObject:object toFile:[NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES )[0] stringByAppendingPathComponent:@".hotListArchiver"]];
}
@end
RouteHandle.m

import "DetailViewController.h"

@implementation RouteHandle

(void )pushDetailInterfaceFromViewController:(UIViewController *)viewController detailData:(NSDictionary *)detailData { DetailViewController *detailViewController = [[DetailViewController alloc]init]; detailViewController.detailData = detailData; [viewController.navigationController pushViewController:detailViewController animated:YES]; } @end AppDelegate.m #import "ViewModel.h" #import "APIHandle.h" #import "StoreHandle.h" #import "RouteHandle.h"

@interface AppDelegate ()
@property (nonatomic, strong ) ViewModel *viewModel;
@property (nonatomic, strong ) APIHandle *apiHandle;
@property (nonatomic, strong ) StoreHandle *storeHandle;
@property (nonatomic, strong ) RouteHandle *routeHandle;
@end

@implementation AppDelegate

(BOOL )application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];

ViewController *viewController = [[ViewController alloc] init];
viewController.viewModel = self.viewModel;
self.apiHandle.viewModel = viewController;
viewController.apiHandle = self.apiHandle;
viewController.storeHandle = self.storeHandle;
viewController.routeHandle = self.routeHandle;

UINavigationController *navigationController = [[UINavigationController alloc]initWithRootViewController:viewController];
self.window.rootViewController = navigationController;

[self.window makeKeyAndVisible];

return YES;
}
(ViewModel *)viewModel
{
if (!_viewModel )
{
_viewModel= [[ViewModel alloc] init];
}
return _viewModel;
}
(APIHandle *)apiHandle
{
if (!_apiHandle )
{
_apiHandle= [[APIHandle alloc] init];
}
return _apiHandle;
}
(StoreHandle *)storeHandle
{
if (!_storeHandle )
{
_storeHandle= [[StoreHandle alloc] init];
}
return _storeHandle;
}
(RouteHandle *)routeHandle
{
if (!_routeHandle )
{
_routeHandle= [[RouteHandle alloc] init];
}
return _routeHandle;
}
```

后记(下面以聊家常为主，没时间没兴趣的朋友请直接忽略)：

在日常中积累越多的人，生活越感无聊，虽然在外人看来顺风顺水。
在异常中辛苦存活的人，生活快感无比，虽然在外人看来非常凶险。
人活一辈子，究竟为了什么呢？：）终究难逃一死啊。或快又或慢。
这是一个非常有意思的问题。有意思的根本在于这一个问题的残酷。
因为，追问之下，多数人都只能回答：我一直不知道！！！！！！！
不要那么笃定啊！不要逃避不确定性啊！人生摇摆中存活才会有趣！

我一直以为，我需要异常来让自己觉得自己是生物而不是死物。
但，真正的异常在哪里呢？最大的异常在哪里呢？
最大的异常，在日常里。
让日常变得异常。
日常非常美丽。整整齐齐，稳稳当当。
如果，日常可以异化，异化成另一种整整齐齐、稳稳当当，那就太好玩了。
如果，可以让这个世界异化成另一种日常。让人们习惯异化，就太好玩了。

寻找日常里的可异化的点，用尽一生去把它异化成日常，那就会太好玩了。

这次找到了一个点：）
递减：）

长久以来，我们被教导要去追求多样性，要丰富。
这是最大的陷阱。
因为，我们会被个体的多样性削弱群体的多样性。
相反，如果我们能回归个人的单一性却可以创造出最广泛的群体多样性。

所以，我们要放弃扩张，而是尽自己一切的努力去收缩。
把触角收缩到以自我为中心的极致小的那个点。
那个，除了自己，任何人都不可能有的点。
当，我们都能找到自己的点，这个世界就有 70 个点。
相反，看看我们身边的这个世界，不停地扩张、积累，最好大家都在吃一样的食物，穿一样的衣服，看一样的娱乐，过一样的人生。
看似极大丰富，实则是极尽无聊。

不外寻，只自问。
通过永不停止的递减，以退为进，找到自己那唯一的点。
不要再被这个世界繁杂所拖累了。