ReactiveCocoa: A repository from z55heihei

ReactiveCocoa(RAC)(行为驱动开发)是一个用Objective-C编写，具有函数式和响应式特性的编程框架。

很不错的RAC资源教程

nshipster

reactivecocoa-for-a-better-world

RAC的作者之一 jspahrsummers 的一个项目:GroceryList

MVVM模式

ReactiveViewModel

MVVM-IOS-Example

花瓣网李忠：ReactiveCocoa是Cocoa的未来

Limboy博客ReactiveCocoa与Functional Reactive Programming 说说ReactiveCocoa 2 ReactiveCocoa2实战

南峰子博客：Category: reactivecocoa

sunnyxx博客

唐巧博客：ReactiveCocoa - iOS开发的新框架

objcn：KVC和KVO 消息传递机制

####与RAC一起使用的框架

便利开发资源开发框架，不一定都要用，但能解决项目代码管理和功能上的MVC依赖性，便利敏捷开发

CocoaPods 依赖管理标准工具

ReactiveViewModel RAC封装MVVM模式

JSONModel-RACExtensions JSONModel是解析返回的JSON数据的库

Masonry RAC可控制UI(xib/StoryBoard)有提供UI Extension，纯代码布局使用Masonry框架值得拥有。

Mantle 构建model,减少大量模版代码,修改映射字段方便，扩展性强。

libextobjc 非常强大的Objective-C库的扩展

####RACObserve ######KVO监测属性 [RACObserve(self.username) subscribeNext:^(NSString *newName) { NSLog(@"%@", newName); }]; ######属性值改变KVO监测并赋值界面层
RAC(self.userNameLable,text) = RACObserve(self,username) ######过滤条件操作 [[RACObserve(self, password) filter:^BOOL(NSString *text) { return [text length] > 6; }]subscribeNext:^(id x) { NSLog(@"%@",x); }]; ######条件符合改变界面 RAC(self.passwordTextField,backgroundColor) = [RACObserve(self, password)map:^id(NSString *text) { return [text length] > 6 ? [UIColor clearColor] : [UIColor yellowColor]; }]; RAC(self.usernameTextField,textColor) = [RACObserve(self.usernameTextField, editing) map:^UIColor *(NSNumber *editing) { return editing ? [UIColor redColor] : [UIColor blackColor]; }]; ######多个属性值条件改变界面 RAC(self.signInButton,enabled) = [RACSignal combineLatest:@[RACObserve(self.password), RACObserve(self.passwordConfirmation) ] reduce:^(NSString *password, NSString *passwordConfirm) { return @([passwordConfirm isEqualToString:password]); }];

######ReactiveCocoa每个UIButton下都有一个rac_command属性，按下按钮都会实现一个事件

RACCommand *loginCommand = [[RACCommand alloc] initWithSignalBlock:^RACSignal *(id input) {
   RACSignal *authSignal = [RACSignal empty];
   return authSignal = [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
			//do login somethings
			return nil;
		}];
	}];
	[loginCommand.executionSignals subscribeNext:^(RACSignal *loginSignal) {
		[loginSignal subscribeCompleted:^{
			NSLog(@"Logged in successfully!");
		}];
}];
self.signInButton.rac_command = loginCommand;

######rac_command.executionSignals是RACCommand的异常信号，rac_command.errors错误集合

self.signInButton.rac_command = [[RACCommand alloc] initWithEnabled:validUsernameSignal 
signalBlock:^RACSignal *(id input) {
        return [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
            //do login request something
            return nil;
        }];
 }];
    
RACSignal *startSignal = [self.signInButton.rac_command.executionSignals map:^id(id value) {
        return @"Sending Request...";
}];
    
RACSignal *successSignal = [self.signInButton.rac_command.executionSignals switchToLatest];
    
RACSignal *failSignal = [self.signInButton.rac_command.errors map:^id(id value) {
     return @"Request Error";
}];
    
RAC(self.stateLable,text) = [RACSignal merge:@[startSignal, successSignal, failSignal]];

//OR
[self.signInButton.rac_command.executionSignals subscribeNext:^(RACSignal *execution) {
   [[[execution dematerialize] deliverOn:[RACScheduler mainThreadScheduler]] subscribeError:^(NSError *error) {
        NSLog(@"%@", error);
   } completed:^{
        NSLog(@"completed");
   }];
}];

####RACSignal RACSignal *validUsernameSignal = [self.usernameTextField.rac_textSignal map:^id(NSString *text) { return @(text.length > 0); } RACSignal *validPasswordSignal = [self.passwordTextField.rac_textSignal map:^id(NSString *text) { return @(text.length > 0); }];

[validUsernameSignal take:1]subscribeNext:^(id x) {
	NSLog(@"take from 1 time: %@", x);
 }];
 
[validUsernameSignal skip:1]subscribeNext:^(id x) {
	NSLog(@"skip from 1 : %@", x);
 }];
 
[validUsernameSignal takeLast:6]subscribeNext:^(id x) {
	NSLog(@"take from last 6 : %@", x);
}];
 
[[self.usernameTextField.rac_textSignal takeUntilBlock:^BOOL(NSString *value) {
	return [value isEqualToString:@"xxx"];
 }] subscribeNext:^(NSString *value) {
	NSLog(@"current value is not `stop`: %@", value);
 }];

RAC(self.usernameTextField, backgroundColor) = [validUsernameSignal map:^id(NSNumber *passwordValid) {
	  return [passwordValid boolValue] ? [UIColor clearColor] : [UIColor yellowColor];
 }];
RAC(self.passwordTextField, backgroundColor) = [validPasswordSignal map:^id(NSNumber *passwordValid) {
	return [passwordValid boolValue] ? [UIColor clearColor] : [UIColor yellowColor];
 }];

RAC(self.signInButton,enabled) = [RACSignal combineLatest:@[validUsernameSignal,validPasswordSignal]
												  reduce:^id(NSNumber *usernameValid, NSNumber *passwordValid){
												  return @([usernameValid boolValue] && [passwordValid boolValue]);
												  }];	

@weakify(self)
RACSignal *cheackUserSignal = [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
   @strongify(self)
   //do request for cheack user
	return nil;
}];
 RACSignal *signSignal = [self.signInButton.rac_actionSignal mapReplace:nil];
 RACSignal *finalLoginSignal = [RACSignal merge:@[cheackUserSignal,signSignal]];
 [finalLoginSignal subscribeCompleted:^{
	 NSLog(@"do both something");
 }];

####RACScheduler Request __block NSInteger number = numberLimit; @weakify(self); RACSignal *timeSignal = [[[[[RACSignal interval:1.0f onScheduler:[RACScheduler mainThreadScheduler]] take:numberLimit] startWith:@(1)] map:^id(NSDate *date) { @strongify(self); if (number == 0) { return @YES; } else{ number--; return @NO; } }] takeUntil:self.rac_willDeallocSignal];

self.timeButton.rac_command = [[RACCommand alloc]initWithEnabled:timeSignal signalBlock:^RACSignal *(id input) {
    number = numberLimit;
    return timeSignal;
}];

NSURL *url = [NSURL URLWithString:@"xxx"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];

[[[NSURLConnection rac_sendAsynchronousRequest:request] deliverOn:[RACScheduler mainThreadScheduler]] subscribeNext:^(id x) {
    // do refresh something
    [[[RACSignal interval:3 onScheduler:[RACScheduler mainThreadScheduler]] take:1] subscribeNext:^(id x) {
        NSLog(@"the result:%@",x)
    }];
}];

####RACDelegateProxy RACDelegateProxy *emailTextFeildproxy = [[RACDelegateProxy alloc] initWithProtocol:@protocol(UITextFieldDelegate)]; [[emailTextFeildproxy rac_signalForSelector:@selector(textFieldDidEndEditing:)] subscribeNext:^(RACTuple *args) { UITextField *field = [args first]; [field resignFirstResponder]; NSString *text = field.text; if (![Common isValiateEmail:text]) { [self showMessage:@"xxx"]; } }];

[[emailTextFeildproxy rac_signalForSelector:@selector(textFieldShouldReturn:)] subscribeNext:^(RACTuple *args) {
	UITextField *field  = [args first];
	[field resignFirstResponder];
}];

self.emailTextFeild.delegate = (id<UITextFieldDelegate>)emailTextFeildproxy;
objc_setAssociatedObject(self.emailTextFeild, _cmd, emailTextFeildproxy, OBJC_ASSOCIATION_RETAIN_NONATOMIC);

####Notification+Category [[[NSNotificationCenter defaultCenter] rac_addObserverForName:UITextFieldTextDidBeginEditingNotification object:self.usernameTextField] subscribeNext:^(id x) { self.usernameTextField.backgroundColor = [UIColor redColor]; }]; ####UIAlertView/UIActionSheet+Category UIAlertView *alertView = [UIAlertView alloc] initWithTitle:@"" message:@"" delegate:nil cancelButtonTitle:@"cancel" otherButtonTitles:@"other1",@"other2",nil]; [alertView rac_buttonClickedSignal]subscribeNext:^(id x) { NSLog(@"%@",x); }]; [alertView show];

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"" delegate:nil cancelButtonTitle:@"cancel"  destructiveButtonTitle:nil otherButtonTitles:@"other1",@"other2", nil];
[[actionSheet rac_buttonClickedSignal]subscribeNext:^(id x) {
	NSLog(@"%@",x);
}];
[actionSheet showInView:self.view];

####UIGestureRecognizer+Category(UIGestureRecognizer-RACExtension) UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] init]; [self.view addGestureRecognizer:tapGesture]; [[tapGesture rac_gestureSignal] subscribeNext:^(id x) { NSLog(@"%@",x); }];

####UIRefreshControl+Category UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init]; [[refreshControl rac_signalForControlEvents:UIControlEventValueChanged] subscribeNext:^(id x) { NSLog("%@",x); }]; ####UIButton+Category [[[self.signInButton rac_signalForControlEvents:UIControlEventTouchUpInside]map:^id(id value) { return self.signInButton; }]subscribeNext:^(id x) { NSLog(@"Sign in result: %@", x); }];

[[[self.signInButton rac_signalForControlEvents:UIControlEventTouchUpInside] flattenMap:^RACStream *(id value) {
	return [self signInSignal];
}] subscribeNext:^(NSNumber *signedIn) {
	BOOL success = [signedIn boolValue];
	if (success) {
		[self performSegueWithIdentifier:@"signInSuccess" sender:self];
	}
}];

####UIBarButtonItem+Category UIBarButtonItem *doneItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"done", nil) style:UIBarButtonItemStylePlain target:nil action:NULL]; [[doneItem.rac_actionSignal flattenMap:^(UIBarButtonItem *item) { //do something }] subscribeNext:^(id _) { //do something }];

######未完待续。。。

z55heihei/ReactiveCocoa