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最近一直断断续续学习关于ReactiveCocoa的知识内容，对于它的一些基础内容将通过本文进行一个总结，主要是一些入门知识
一：RACSignal一些运用
@interface RACSignalTestViewController () @property(nonatomic,strong)RACSignal *mySignal,*secondSingl; @end
-(RACSignal *)mySignal
{
if (!_mySignal) {
_mySignal=[RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
[subscriber sendNext:@10];
[subscriber sendCompleted];
return nil;
}];
}
return _mySignal;
}
-(RACSignal *)secondSingl
{
if (!_secondSingl) {
_secondSingl=[RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
[subscriber sendNext:@20];
[subscriber sendCompleted];
return nil;
}];
}
return _secondSingl;
}
先创建两个RACSignal的内容；将用于接下来的一些操作
//map运用 返回的值作为next的参数
[[self.mySignal map:^id(NSNumber *value) {
return [value integerValue]>5?@"踏浪帅":@"有点小";
}] subscribeNext:^(NSString *str) {
NSLog(@"map处理完成的值为：%@",str);
}];
//filter:过滤信号，使用它可以获取满足条件的信号.
[[self.mySignal filter:^BOOL(NSNumber *item) {
return [item integerValue]>5;
}] subscribeNext:^(NSNumber *x) {
NSLog(@"filter当前的值%ld",[x integerValue]);
}];
//ignore:忽略完某些值的信号.当答合被ignore的值时就不会执行next
[[self.mySignal ignore:@10] subscribeNext:^(id x) {
NSLog(@"ignore当前的值:%@",x);
}];
//distinctUntilChanged:当上一次的值和当前的值有明显的变化就会发出信号，否则会被忽略掉。
[[self.mySignal distinctUntilChanged] subscribeNext:^(id x) {
NSLog(@"distinctUntilChanged当前的值:%@",x);
}];
//take:从开始一共取N次的信号
//takeLast:取最后N次的信号,前提条件，订阅者必须调用完成，因为只有完成，就知道总共有多少信号.
//takeUntil:(RACSignal *):获取信号直到某个信号执行完成
//skip:(NSUInteger):跳过几个信号,不接受。
运行结果：
MobileProject[885:18784] map处理完成的值为：踏浪帅 2016-02-02 16:03:07.643 MobileProject[885:18784] filter当前的值10 2016-02-02 16:03:07.644 MobileProject[885:18784] distinctUntilChanged当前的值:10
1.2：一些组合的操作
//concat:按一定顺序拼接信号，当多个信号发出的时候，有顺序的接收信号
RACSignal *concatSignal=[self.mySignal concat:self.secondSingl];
[concatSignal subscribeNext:^(id x) {
NSLog(@"concat拼接的值：%@",x);
}];
//then:用于连接两个信号，当第一个信号完成，才会连接then返回的信号
[[self.mySignal then:^RACSignal *{
@strongify(self);
return self.secondSingl;
}] subscribeNext:^(id x) {
//// 只能接收到第二个信号的值，也就是then返回信号的值
NSLog(@"then当前的值为：%@",x);
}];
//merge:把多个信号合并为一个信号，任何一个信号有新值的时候就会调用
RACSignal *mergeSignal=[self.mySignal merge:self.secondSingl];
[mergeSignal subscribeNext:^(id x) {
NSLog(@"merge当前的值为:%@",x);
}];
//combineLatest:将多个信号合并起来，并且拿到各个信号的最新的值,必须每个合并的signal至少都有过一次sendNext，两个信号的内容合并成一个元组RACTuple,才会触发合并的信号。
RACSignal *combineLatestSignal=[self.mySignal combineLatestWith:self.secondSingl];
[combineLatestSignal subscribeNext:^(id x) {
NSLog(@"combineLastest当前的值为：%@",x);
}];
//zipWith:把两个信号压缩成一个信号，只有当两个信号同时发出信号内容时，并且把两个信号的内容合并成一个元组RACTuple，才会触发压缩流的next事件。
RACSignal *zipWithSignal=[self.mySignal zipWith:self.secondSingl];
[zipWithSignal subscribeNext:^(RACTuple *tuple) {
NSLog(@"zipWith当前的值为：%@",tuple);
NSLog(@"zipWith中的RACTuple共有几个值：%ld",tuple.count);
NSLog(@"zipWith中的RACTuple第一个值为：%@",tuple.first);
NSLog(@"zipWith中的RACTuple最后一个值为：%@",tuple.last);
}];
//reduce聚合:用于信号发出的内容是元组，把信号发出元组的值聚合成一个值 特别是combineLatestWith,zipWith这种返回元组的RACTuple,reduceblcok中的参数，有多少信号组合，reduceblcok就有多少参数，每个参数就是之前信号发出的内容
RACSignal *reduceSignal=[RACSignal combineLatest:@[self.mySignal,self.secondSingl] reduce:^id(NSNumber *num1 ,NSNumber *num2){
NSLog(@"combineLastest结合reduct的第一个值为：%ld 第二个值为：%ld",[num1 integerValue],[num2 integerValue]);
return ([num1 integerValue]>10&&[num2 integerValue]>15)?@"两个都符合要求":@"都没有答合要求";
}];
[reduceSignal subscribeNext:^(id x) {
NSLog(@"reduce当前的值为：%@",x);
}];
运行结果：
MobileProject[885:18784] concat拼接的值：10
2016-02-02 16:03:07.645 MobileProject[885:18784] concat拼接的值：20
2016-02-02 16:03:07.646 MobileProject[885:18784] then当前的值为：20
2016-02-02 16:03:07.646 MobileProject[885:18784] merge当前的值为:10
2016-02-02 16:03:07.646 MobileProject[885:18784] merge当前的值为:20
2016-02-02 16:03:07.647 MobileProject[885:18784] combineLastest当前的值为：<RACTuple: 0x7ff5ca606860> (
10,
20
)
2016-02-02 16:03:07.648 MobileProject[885:18784] zipWith当前的值为：<RACTuple: 0x7ff5ca60ab80> (
10,
20
)
2016-02-02 16:03:07.648 MobileProject[885:18784] zipWith中的RACTuple共有几个值：2
2016-02-02 16:03:07.648 MobileProject[885:18784] zipWith中的RACTuple第一个值为：10
2016-02-02 16:03:07.648 MobileProject[885:18784] zipWith中的RACTuple最后一个值为：20
2016-02-02 16:03:07.649 MobileProject[885:18784] combineLastest结合reduct的第一个值为：10 第二个值为：20
2016-02-02 16:03:07.720 MobileProject[885:18784] reduce当前的值为：都没有答合要求
1.3：其它一些操作：
//doNext: 执行Next之前，会先执行这个Block,可以做一些初使化的功能,doCompleted: 执行sendCompleted之前，会先执行这个Block
[[[self.mySignal doNext:^(id x) {
NSLog(@"doNext当前的值：%@",x);
}] doCompleted:^{
NSLog(@"doComplete 执行到了");
}] subscribeNext:^(id x) {
NSLog(@"测试doNext,doComplete的值：%@",x);
}];
//switchToLatest:用于signalOfSignals（信号的信号），有时候信号也会发出信号，会在signalOfSignals中，获取signalOfSignals发送的最新信号。
RACSubject *signalOfSignals = [RACSubject subject];
RACSubject *signal = [RACSubject subject];
// 获取信号中信号最近发出信号，订阅最近发出的信号。
// 注意switchToLatest：只能用于信号中的信号
[signalOfSignals.switchToLatest subscribeNext:^(id x) {
NSLog(@"switchToLatest%@",x);
}];
[signalOfSignals sendNext:signal];
[signal sendNext:@1];
//deliverOn: 内容传递切换到制定线程中，副作用在原来线程中,把在创建信号时block中的代码称之为副作用。
//subscribeOn: 内容传递和副作用都会切换到制定线程中。‘
//timeout：超时，可以让一个信号在一定的时间后，自动报错。
[[self.mySignal timeout:1 onScheduler:[RACScheduler currentScheduler]]
subscribeNext:^(id x) {
NSLog(@"timeout当前的值：%@",x);
} error:^(NSError *error) {
NSLog(@"timeout 超时了");
}];
//delay 延迟发送next。
[[self.mySignal delay:2] subscribeNext:^(id x) {
NSLog(@"delay执行%@",x);
}];
//retry重试 ：只要失败，就会重新执行创建信号中的block,直到成功.
__block int i = 0;
[[[RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
if (i == 10) {
[subscriber sendNext:@100];
}else{
NSLog(@"接收到错误");
[subscriber sendError:nil];
}
i++;
return nil;
}] retry] subscribeNext:^(id x) {
NSLog(@"retry当前的值：%@",x);
} error:^(NSError *error) {
}];
//普通执行多次订阅
RACSignal *oneSignal = [[RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
[subscriber sendNext:@1];
[subscriber sendNext:@2];
return nil;
}] replay];
[oneSignal subscribeNext:^(id x) {
NSLog(@"第一个没有replay执行的内容：%@",x);
}];
[oneSignal subscribeNext:^(id x) {
NSLog(@"第二个没有replay执行的内容：%@",x);
}];
//replay重放：当一个信号被多次订阅,反复播放内容
RACSignal *replaySignal = [[RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
[subscriber sendNext:@1];
[subscriber sendNext:@2];
return nil;
}] replay];
[replaySignal subscribeNext:^(id x) {
NSLog(@"replay第一个订阅者%@",x);
}];
[replaySignal subscribeNext:^(id x) {
NSLog(@"replay第二个订阅者%@",x);
}];
//interval 定时：每隔一段时间发出信号
[[RACSignal interval:1 onScheduler:[RACScheduler currentScheduler]] subscribeNext:^(id x) {
NSLog(@"interval一直在执行：%@",x);
}];
//throttle节流:当某个信号发送比较频繁时，可以使用节流，在某一段时间不发送信号内容，过了一段时间获取信号的最新内容发出。
运行结果：
2016-02-02 16:03:07.720 MobileProject[885:18784] doNext当前的值：10 2016-02-02 16:03:07.720 MobileProject[885:18784] 测试doNext,doComplete的值：10 2016-02-02 16:03:07.721 MobileProject[885:18784] doComplete 执行到了 2016-02-02 16:03:07.721 MobileProject[885:18784] switchToLatest1 2016-02-02 16:03:07.722 MobileProject[885:18784] timeout当前的值：10 2016-02-02 16:03:07.722 MobileProject[885:18784] 接收到错误 2016-02-02 16:03:07.723 MobileProject[885:18784] 第一个没有replay执行的内容：1 2016-02-02 16:03:07.723 MobileProject[885:18784] 第一个没有replay执行的内容：2 2016-02-02 16:03:07.723 MobileProject[885:18784] 第二个没有replay执行的内容：1 2016-02-02 16:03:07.723 MobileProject[885:18784] 第二个没有replay执行的内容：2 2016-02-02 16:03:07.724 MobileProject[885:18784] replay第一个订阅者1 2016-02-02 16:03:07.724 MobileProject[885:18784] replay第一个订阅者2 2016-02-02 16:03:07.724 MobileProject[885:18784] replay第二个订阅者1 2016-02-02 16:03:07.724 MobileProject[885:18784] replay第二个订阅者2 2016-02-02 16:03:07.838 MobileProject[885:18784] 接收到错误 2016-02-02 16:03:07.838 MobileProject[885:18784] 接收到错误 2016-02-02 16:03:07.838 MobileProject[885:18784] 接收到错误 2016-02-02 16:03:07.838 MobileProject[885:18784] 接收到错误 2016-02-02 16:03:07.839 MobileProject[885:18784] 接收到错误 2016-02-02 16:03:07.865 MobileProject[885:18784] 接收到错误 2016-02-02 16:03:07.865 MobileProject[885:18784] 接收到错误 2016-02-02 16:03:07.865 MobileProject[885:18784] 接收到错误 2016-02-02 16:03:07.866 MobileProject[885:18784] 接收到错误 2016-02-02 16:03:07.866 MobileProject[885:18784] retry当前的值：100 2016-02-02 16:03:08.726 MobileProject[885:18784] interval一直在执行：2016-02-02 08:03:08 +0000 2016-02-02 16:03:09.724 MobileProject[885:18784] delay执行10 2016-02-02 16:03:09.725 MobileProject[885:18784] interval一直在执行：2016-02-02 08:03:09 +0000 2016-02-02 16:03:10.726 MobileProject[885:18784] interval一直在执行：2016-02-02 08:03:10 +0000 2016-02-02 16:03:11.724 MobileProject[885:18784] interval一直在执行：2016-02-02 08:03:11 +0000 2016-02-02 16:03:12.727 MobileProject[885:18784] interval一直在执行：2016-02-02 08:03:12 +0000 2016-02-02 16:03:13.725 MobileProject[885:18784] interval一直在执行：2016-02-02 08:03:13 +0000 2016-02-02 16:03:14.730 MobileProject[885:18784] interval一直在执行：2016-02-02 08:03:14 +0000 2016-02-02 16:03:15.726 MobileProject[885:18784] interval一直在执行：2016-02-02 08:03:15 +0000
二：关于RACCommand的一些知识
@interface TestRacViewController () @property(nonatomic,strong)UITextField *userNameText; @property(strong,nonatomic)NSString *username; @property(nonatomic,strong)UIButton *loginButton,*racCommendButton,*errCommendButton,*mainThreadButton,*netWorkButton,*testButton; @property(nonatomic,strong)RACCommand *otherMyRaccomand,*mainThreadCommend,*netWorkCommend,*testPropertyCommend; @end
//布局
-(void)loadPage
{
if (!self.userNameText) {
self.userNameText=[[UITextField alloc]init];
self.userNameText.backgroundColor=[UIColor whiteColor];
self.userNameText.placeholder=@"输入用户名";
[self.view addSubview:self.userNameText];
[self.userNameText mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(self.view.mas_left).with.offset(15);
make.top.mas_equalTo(self.view.mas_top).with.offset(70);
make.right.mas_equalTo(self.view.mas_right).with.offset(-15);
make.height.mas_equalTo(@40);
}];
}
if(!self.loginButton)
{
self.loginButton=[[UIButton alloc]init];
[self.loginButton setTitle:@"响应" forState:UIControlStateNormal];
self.loginButton.backgroundColor=[UIColor blueColor];
[self.view addSubview:self.loginButton];
[self.loginButton mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(self.view.mas_left).with.offset(15);
make.top.mas_equalTo(self.userNameText.mas_bottom).with.offset(20);
make.right.mas_equalTo(self.view.mas_right).with.offset(-15);
make.height.mas_equalTo(@40);
}];
}
if(!self.racCommendButton)
{
self.racCommendButton=[[UIButton alloc]init];
[self.racCommendButton setTitle:@"RacCommend测试" forState:UIControlStateNormal];
self.racCommendButton.backgroundColor=[UIColor blueColor];
[self.view addSubview:self.racCommendButton];
[self.racCommendButton mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(self.view.mas_left).with.offset(15);
make.top.mas_equalTo(self.loginButton.mas_bottom).with.offset(20);
make.right.mas_equalTo(self.view.mas_right).with.offset(-15);
make.height.mas_equalTo(@40);
}];
}
if(!self.errCommendButton)
{
self.errCommendButton=[[UIButton alloc]init];
[self.errCommendButton setTitle:@"ERROR测试" forState:UIControlStateNormal];
self.errCommendButton.backgroundColor=[UIColor blueColor];
[self.view addSubview:self.errCommendButton];
[self.errCommendButton mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(self.view.mas_left).with.offset(15);
make.top.mas_equalTo(self.racCommendButton.mas_bottom).with.offset(20);
make.right.mas_equalTo(self.view.mas_right).with.offset(-15);
make.height.mas_equalTo(@40);
}];
}
if(!self.mainThreadButton)
{
self.mainThreadButton=[[UIButton alloc]init];
[self.mainThreadButton setTitle:@"主线程上运行" forState:UIControlStateNormal];
self.mainThreadButton.backgroundColor=[UIColor blueColor];
[self.view addSubview:self.mainThreadButton];
[self.mainThreadButton mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(self.view.mas_left).with.offset(15);
make.top.mas_equalTo(self.errCommendButton.mas_bottom).with.offset(20);
make.right.mas_equalTo(self.view.mas_right).with.offset(-15);
make.height.mas_equalTo(@40);
}];
}
if(!self.netWorkButton)
{
self.netWorkButton=[[UIButton alloc]init];
[self.netWorkButton setTitle:@"属性测试" forState:UIControlStateNormal];
self.netWorkButton.backgroundColor=[UIColor blueColor];
[self.view addSubview:self.netWorkButton];
[self.netWorkButton mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(self.view.mas_left).with.offset(15);
make.top.mas_equalTo(self.mainThreadButton.mas_bottom).with.offset(20);
make.right.mas_equalTo(self.view.mas_right).with.offset(-15);
make.height.mas_equalTo(@40);
}];
}
if(!self.testButton)
{
self.testButton=[[UIButton alloc]init];
[self.testButton setTitle:@"测试特性" forState:UIControlStateNormal];
self.testButton.backgroundColor=[UIColor blueColor];
[self.view addSubview:self.testButton];
[self.testButton mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(self.view.mas_left).with.offset(15);
make.top.mas_equalTo(self.netWorkButton.mas_bottom).with.offset(20);
make.right.mas_equalTo(self.view.mas_right).with.offset(-15);
make.height.mas_equalTo(@40);
}];
}
}
一些定义
//创建一个信号代码
-(RACSignal *)testSignal
{
RACSignal *signal = [RACSignal createSignal:^ RACDisposable * (id<RACSubscriber> subscriber) {
NSLog(@"创建信号");
[subscriber sendNext:@"Hi 我是一个信号"];
[subscriber sendCompleted];
return nil;
}];
return signal;
}
//创建一个命令响应
-(RACCommand *)testCommend
{
@weakify(self);
RACCommand *myCommend=[[RACCommand alloc] initWithSignalBlock:^RACSignal *(id input) {
RACSignal *authSignal=[RACSignal empty];
@strongify(self);
authSignal=[RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
//可以根据要求加条件进行判断是否创建信号
if ([self.username isEqualToString:@"wjy"]) {
NSLog(@"符合要求");
[subscriber sendNext:@"我完成的命令响应"];
[subscriber sendCompleted];
}
else
{
//错误
[subscriber sendError:[NSError errorWithDomain:@"报错了" code:1 userInfo:nil]];
}
return nil;
}];
//materialize是为了处理拿不到error的问题
return [authSignal materialize];
}];
return myCommend;
}
//创建属性的RACCommand
-(RACCommand *)otherMyRaccomand
{
if (!_otherMyRaccomand) {
_otherMyRaccomand=[[RACCommand alloc] initWithSignalBlock:^RACSignal *(id input) {
NSLog(@"执行到新的RACCommand");
RACSignal *otherSignal=[RACSignal empty];
otherSignal=[RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
if ([self.username isEqualToString:@"wjy"]) {
[subscriber sendNext:@"我肯定可以运行的"];
[subscriber sendCompleted];
}
else
{
[subscriber sendError:[NSError errorWithDomain:@"报错了" code:401 userInfo:nil]];
}
return nil;
}];
return otherSignal;
}];
}
return _otherMyRaccomand;
}
//创建主线程上运行
-(RACCommand *)mainThreadCommend
{
@weakify(self);
if (!_mainThreadCommend) {
_mainThreadCommend=[[RACCommand alloc] initWithSignalBlock:^RACSignal *(id input) {
RACSignal *authSignal=[RACSignal empty];
@strongify(self);
authSignal=[RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
@strongify(self);
//可以根据要求加条件进行判断是否创建信号
if ([self.username isEqualToString:@"wjy"]) {
[subscriber sendNext:@(YES)];
[subscriber sendCompleted];
}
else
{
//错误
[subscriber sendError:[NSError errorWithDomain:@"报错了" code:1 userInfo:nil]];
}
return nil;
}];
return authSignal;
}];
}
return _mainThreadCommend;
}
//特性测试
-(RACCommand *)testPropertyCommend
{
if (!_testPropertyCommend) {
}
return _testPropertyCommend;
}
-(RACSignal *)nettestSignal
{
RACSignal *authSignal=[RACSignal empty];
authSignal=[RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
LogInApi *reg = [[LogInApi alloc] initWithUsername:self.username password:@"123456"];
[reg startWithCompletionBlockWithSuccess:^(YTKBaseRequest *request) {
LoginModel *model=[[LoginModel alloc]initWithString:request.responseString error:nil];
[subscriber sendNext:model];
[subscriber sendCompleted];
} failure:^(YTKBaseRequest *request) {
[subscriber sendError:[NSError errorWithDomain:@"报错了" code:1 userInfo:nil]];
}];
return nil;
}];
return authSignal;
}
-(RACSignal *)netSignal
{
RACSignal *authSignal=[RACSignal empty];
authSignal=[RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
[subscriber sendNext:@"测试"];
[subscriber sendCompleted];
return nil;
}];
return authSignal;
}
//RACSubject的运用
-(RACSubject *)testSubject
{
RACSubject *sub=[RACSubject subject];
[sub sendNext:@"我是RACSubject"];
return sub;
}
运用的内容：
[self loadPage];
@weakify(self);
//把左边的属性跟右边信号signal的sendNext值绑定 distinctUntilChanged为了当值相同时不执行
RAC(self,username)=[self.userNameText.rac_textSignal distinctUntilChanged];
//监听username是否有变化,有变化就会执行subscribeNext 这个属性要支持KVO 可变数组就不可以
[RACObserve(self, username) subscribeNext:^(NSString *x) {
NSLog(@"你当前输入的值为：%@",x);
}];
//UIAlertView跟RAC结合
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"" message:@"Alert" delegate:nil cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
[[alertView rac_buttonClickedSignal] subscribeNext:^(NSNumber *indexNumber) {
if ([indexNumber intValue] == 1) {
NSLog(@"你点了确定");
} else {
NSLog(@"你点了取消");
}
}];
[alertView show];
//Button响应事件
[[self.loginButton
rac_signalForControlEvents:UIControlEventTouchUpInside]
subscribeNext:^(UIButton *x) {
@strongify(self);
[[self testSignal] subscribeNext:^(id x) {
NSLog(@"当前执行值为：%@",x);
}];
}];
//Button用命令式运行 switchToLatest处理信号中传递的参数为信号
self.racCommendButton.rac_command=[self testCommend];
//这个绑定要放在executionSignals执行前面 否则只会有一个执行完成会响应
[self.racCommendButton.rac_command.executing subscribeNext:^(id x) {
if ([x boolValue]) {
NSLog(@"rac_command正在执行中");
}
else
{
NSLog(@"rac_command执行完成");
}
}];
//dematerialize处理可以响应处理跟完成的内容
[self.racCommendButton.rac_command.executionSignals subscribeNext:^(RACSignal *execution) {
[[[execution dematerialize] deliverOn:[RACScheduler mainThreadScheduler]] subscribeNext:^(id x) {
NSLog(@"提示内容：%@",x);
} error:^(NSError *error) {
NSLog(@"racCommend出错了");
}];
}];
//关于otherMyRaccomand的方式
self.errCommendButton.rac_command=self.otherMyRaccomand;
[self.otherMyRaccomand.executionSignals.switchToLatest subscribeNext:^(id x) {
NSLog(@"完成了 %@",x);
}];
//这边要注意是在errors 里面执行subscribeNext 不是执行subscribeError
[self.otherMyRaccomand.errors subscribeNext:^(NSError *error) {
NSLog(@"出错了 %@",error);
}];
//主线程上操作
self.mainThreadButton.rac_command=self.mainThreadCommend;
[[[self.mainThreadCommend.executionSignals.switchToLatest map:^id(id value) {
if ([value boolValue]) {
return @"跳浪帅";
}
else
{
return @"出太阳好么";
}
}] deliverOn:[RACScheduler mainThreadScheduler]] subscribeNext:^(NSString *str) {
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"我是弹出窗" message:[NSString stringWithFormat:@"%@",str] delegate:nil cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
[alert show];
}];
//网络请求
//Button响应事件
[[self.netWorkButton
rac_signalForControlEvents:UIControlEventTouchUpInside]
subscribeNext:^(id x) {
[[[self netSignal] flattenMap:^RACStream *(id value) {
return [RACReturnSignal return:[NSString stringWithFormat:@"%@ 我已经被改变了成为另外一个信号",value]];
}]
subscribeNext:^(id x) {
NSLog(@"输出的内容:%@",x);
}];
}];
因为代码中已经有相应的注解，所以文字说明就比较少，若有不明白可以留言；
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原文地址：http://www.cnblogs.com/wujy/p/5177819.html
