ReactiveCocoa：
首先使用Pod前，先查看一下版本信息，选择好需要的版本，特别是使用objc时候，不需要选择太新的，主要是已经不再更新了，在这里，我选择的是一个2.0版本，版本特性在大多数博文中都有详细介绍，我就不一一列举了。
PodFIle文件设置：
当然，只是简单的
也是可以的，我这样写无非是万无一失的，之后Pod update等待下载完成就可以。
打开工程文件夹中由pod新生成的workplace，这样就可以利用：
将RAC库导入到工程中去了。
在这之后，我们可以简单进行测试一下一些特性：
简单的信号订阅，这样在输入框中输入的内容就会被实时捕获：
当然你还可以进行对其他的特性进行简单测试：如信号合并等
在这里我实现了一个简单的登录界面demo：
1、当帐号密码不满足条件时输入框显示黄色，同时按钮无效
2、当帐号密码满足条件，输入框变为白色，按钮生效
我简单将一些实现的代码贴一下，方便大家试试：
@H_
404_27@
#import "ViewController.h"
#import "RWDummySignInService.h"
#import <ReactiveCocoa/ReactiveCocoa.h>
@interface ViewController ()
@property (
strong,
nonatomic)
IBOutlet UITextField *newa;
@property (
strong,
nonatomic)
IBOutlet UITextField *usrname;
@property (
strong,
nonatomic)
IBOutlet UITextField *password;
@property (
strong,
nonatomic)
IBOutlet UIButton *button;
@property (
strong,
nonatomic) RWDummySignInService *signInService;
@end
@implementation ViewController
- (
void)viewDidLoad {
[
super viewDidLoad];
self.signInService = [RWDummySignInService new];
RACSignal *signal = [
self createSignal];
[signal subscribeNext:^(
id x) {
NSLog(@
"%@",x);
}];
RACSignal * a = [
self.usrname.rac_textSignal map:^
id(
NSString *text) {
return @([
self isValidUsername:text]);
}];
RACSignal * b = [
self.password.rac_textSignal map:^
id(
NSString *text) {
return @([
self isValidPassword:text]);
}];
RAC(
self.usrname,backgroundColor) =
[a map:^
id(
NSNumber *usernameValid) {
return [usernameValid boolValue]?[
UIColor whiteColor]:[
UIColor yellowColor];
}];
RAC(
self.password,backgroundColor) =
[b map:^
id(
NSNumber *passwordValid) {
return [passwordValid boolValue]?[
UIColor whiteColor]:[
UIColor yellowColor];
}];
RACSignal *signUpActivateSignal =
[RACSignal combineLatest:@[a,b] reduce:^
id(
NSNumber *username,
NSNumber *password){
return @([username boolValue] && [password boolValue]);
}];
[signUpActivateSignal subscribeNext:^(
NSNumber *signupActive) {
self.button.enabled = [signupActive boolValue];
}];
[[[
self.button rac_signalForControlEvents:UIControlEventTouchUpInside] flattenMap:^
id(
id value) {
return [
self singInSignal];
}] subscribeNext:^(
id x) {
NSLog(@
"Sign in result:%@",x);
}];
}
- (
BOOL)isValidUsername:(
NSString *)username {
return username
.length >
3;
}
- (
BOOL)isValidPassword:(
NSString *)password {
return password
.length >
3;
}
- (
void)didReceiveMemoryWarning {
[
super didReceiveMemoryWarning];
}
- (RACSignal*) createSignal{
return [RACSignal createSignal:^RACDisposable *(
id<RACSubscriber> subscriber) {
NSLog(@
"signal is created");
return nil;
}];
}
-(RACSignal *)singInSignal {
return [RACSignal createSignal:^RACDisposable *(
id<RACSubscriber> subscriber) {
[
self.signInService
signInWithUsername:
self.usrname.text
password:
self.password.text
complete:^(
BOOL success) {
[subscriber sendNext:@(success)];
[subscriber sendCompleted];
}];
return nil;
}];
}
@end
好了，讲到这里，更多高级特性请移步以下链接学习：
• http://spin.atomicobject.com/2014/02/03/objective-c-delegate-pattern/
• http://blog.bignerdranch.com/4549-data-driven-ios-development-reactivecocoa/
• http://en.wikipedia.org/wiki/Functional_reactive_programming
• http://www.teehanlax.com/blog/reactivecocoa/
• http://www.teehanlax.com/blog/getting-started-with-reactivecocoa/
• http://nshipster.com/reactivecocoa/
• http://cocoasamurai.blogspot.com/2013/03/basic-mvvm-with-reactivecocoa.html
• http://iiiyu.com/2013/09/11/learning-ios-notes-twenty-eight/
• https://speakerdeck.com/andrewsardone/reactivecocoa-at-mobidevday-2013
• http://msdn.microsoft.com/en-us/library/hh848246.aspx
• http://www.itiger.me/?p=38
• http://blog.leezhong.com/ios/2013/12/27/reactivecocoa-2.html
• https://github.com/ReactiveCocoa/ReactiveCocoa/blob/master/Documentation/FrameworkOverview.md
• http://www.haskell.org/haskellwiki/Functional_Reactive_Programming
• http://blog.zhaojie.me/2009/09/functional-reactive-programming-for-csharp.html
