1、KVO
/// KVO
- (void)racKVO {
[RACObserve(self, index) subscribeNext:^(id _Nullable x) {
NSLog(@"index = %@",x);
}];
[[RACObserve(self, index) filter:^BOOL(id _Nullable value) {
NSString * number = [NSString stringWithFormat:@"%@",value];
return [number integerValue] > 3;
}] subscribeNext:^(id _Nullable x) {
NSLog(@"index1 = %@",x);
}];
}
2、对象遍历
/// 对象遍历
- (void)racTraverse {
self.strArr = @[@"11",@"22",@"33"];
self.strDict = @{@"name":@"lise",@"age":@"16"};
[self.strArr.rac_sequence.signal subscribeNext:^(id _Nullable x) {
NSLog(@"数组遍历 = %@",x);
}];
[self.strDict.rac_valueSequence.signal subscribeNext:^(id _Nullable x) {
NSLog(@"dict = %@",x);
}];
// map: 映射， 返回有映射值的信号
[[self.strArr.rac_sequence.signal map:^id _Nullable(id _Nullable value) {
NSLog(@"value = %@",value);
return [NSString stringWithFormat:@"%@ number",value];
}] subscribeNext:^(id _Nullable x) {
NSLog(@"xxx = %@",x);
}];
}
3、文本输入监听
/// 输入框文本监听
- (void)racTextChange {
[self.textField.rac_textSignal subscribeNext:^(NSString * _Nullable x) {
NSLog(@"点击TextField 文本 = %@",x);
}];
}
4、点击事件
/// 点击事件
- (void)racClickEnent {
[[self.senderBtn rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(__kindof UIControl * _Nullable x) {
NSLog(@"点击Button");
}];
}
5、反向传值
A、
- (void)racDelegateEvent {
[[self.senderBtn rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(__kindof UIControl * _Nullable x) {
ViewControllerB *b = [[ViewControllerB alloc]init];
[b.subject subscribeNext:^(id _Nullable x) {
NSLog(@"接收成功---");
}];
[self presentViewController:b animated:YES completion:nil];
}];
}
B、
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
if (self.subject) {
[self.subject sendNext:@"发送成功"];
}
[self dismissViewControllerAnimated:YES completion:nil];
}
- (RACSubject *)subject {
if (!_subject) {
_subject = [RACSubject subject];
}
return _subject;
}
6、通知
/// 通知监听
- (void)racNotificationCenter {
//用rac通知不需要在dealloc 移除通知
[[[NSNotificationCenter defaultCenter] rac_addObserverForName:@"NOTI" object:nil] subscribeNext:^(NSNotification * _Nullable x) {
NSLog(@"通知x = %@",x);
}];
}
7、Concat
- (void)racConcat{
//创建一个信号管A
RACSignal *siganlA = [RACSignal createSignal:^RACDisposable *(id subscriber) {
[subscriber sendNext:@"吃饭"];
[subscriber sendCompleted];
return nil;
}];
//创建一个信号管B
RACSignal *siganlB = [RACSignal createSignal:^RACDisposable *(id subscriber) {
[subscriber sendNext:@"吃的饱饱的,才可以睡觉的"];
[subscriber sendCompleted];
return nil;
}];
//串联管A和管B
RACSignal *concatSiganl = [siganlA concat:siganlB];
//串联后的接收端处理 ,两个事件,走两次,第一个打印siggnalA的结果,第二次打印siganlB的结果
[concatSiganl subscribeNext:^(id x) {
NSLog(@"x = %@",x);
}];
/*
2020-12-29 15:23:36.986317+0800 CMF[9981:249102] x = 吃饭
2020-12-29 15:23:36.986461+0800 CMF[9981:249102] x = 吃的饱饱的,才可以睡觉的
*/
}
8、Merge（合并）
/// 合并
- (void)racMerge{
//创建信号A
RACSignal *siganlA = [RACSignal createSignal:^RACDisposable *(id subscriber) {
[subscriber sendNext:@"纸厂污水"];
[subscriber sendCompleted];
return nil;
}];
//创建信号B
RACSignal *siganlB = [RACSignal createSignal:^RACDisposable *(id subscriber) {
[subscriber sendNext:@"电镀厂污水"];
[subscriber sendCompleted];
return nil;
}];
//并联两个信号,根上面一样,分两次打印
RACSignal *mergeSiganl = [RACSignal merge:@[siganlA,siganlB]];
[mergeSiganl subscribeNext:^(id x) {
NSLog(@"%@",x);
}];
/*
2020-12-29 15:22:14.554204+0800 CMF[9929:247474] 纸厂污水
2020-12-29 15:22:14.554359+0800 CMF[9929:247474] 电镀厂污水
*/
}
9、CombineLatest
/// 组合
- (void)combineLatest {
RACSubject *sub1 = [RACSubject subject];
RACSubject *sub2 = [RACSubject subject];
[[RACSignal combineLatest:@[sub1,sub2] reduce:^(NSString *num1, NSString *num2){
return [NSString stringWithFormat:@"%@-%@",num1,num2];
}] subscribeNext:^(id _Nullable x) {
}];
//组合信号
[[RACSignal combineLatest:@[sub1,sub2] reduce:^(NSString *letter, NSString *number){
return [letter stringByAppendingString:number];
}] subscribeNext:^(id x) {
NSLog(@"%@",x);
}];
[sub1 sendNext:@"A"];
[sub1 sendNext:@"B"];
[sub2 sendNext:@"1"]; //此时有结果打印，打印结果B1
[sub1 sendNext:@"C"]; //打印结果C1
[sub2 sendNext:@"2"]; //打印结果C2
}
10、压缩合流
// 压缩合流
- (void)zipTuple {
RACSignal *subject1 = [RACSignal createSignal:^RACDisposable * _Nullable(id _Nonnull subscriber) {
[subscriber sendNext:@"红"];
[subscriber sendCompleted];
return nil;
}];
RACSignal *subject2 = [RACSignal createSignal:^RACDisposable * _Nullable(id _Nonnull subscriber) {
[subscriber sendNext:@"绿"];
[subscriber sendCompleted];
return nil;
}];
//合流后处理的是压缩包,需要解压后才能取到里面的值
[[subject1 zipWith:subject2] subscribeNext:^(id _Nullable x) {
//解压缩
RACTupleUnpack(NSString *str1, NSString *str2) = x;
NSLog(@"str1 = %@ , str2 = %@ ", str1, str2);
}];
/*
2020-12-29 15:21:30.584915+0800 CMF[9905:246624] str1 = 红 , str2 = 绿
*/
}
11、filter（过滤）
/// 过滤
- (void)filterValue {
RACSignal *signal = [RACSignal createSignal:^RACDisposable * _Nullable(id _Nonnull subscriber) {
[subscriber sendNext:@(14)];
[subscriber sendNext:@(16)];
[subscriber sendNext:@(24)];
[subscriber sendNext:@(11)];
[subscriber sendNext:@(6)];
[subscriber sendCompleted];
return nil;
}];
[[signal filter:^BOOL(NSNumber * value) {
return value.intValue >= 14;
}] subscribeNext:^(id _Nullable x) {
NSLog(@"filter-Value = %@",x);
}];
/*
2020-12-29 13:51:38.320945+0800 CMF[7598:188614] filter-Value = 14
2020-12-29 13:51:38.321104+0800 CMF[7598:188614] filter-Value = 16
2020-12-29 13:51:38.321206+0800 CMF[7598:188614] filter-Value = 24
*/
}
12、flattenMap
- (void)flattenMap {
RACSignal *siganl = [RACSignal createSignal:^RACDisposable *(id subscriber) {
NSLog(@"打蛋液");
[subscriber sendNext:@"蛋液"];
[subscriber sendCompleted];
return nil;
}];
//对信号进行秩序秩序的第一步
siganl = [siganl flattenMap:^RACSignal *(NSString *value) {
//处理上一步的RACSiganl的信号value.这里的value=@"蛋液"
NSLog(@"把%@倒进锅里面煎",value);
return [RACSignal createSignal:^RACDisposable *(id subscriber) {
[subscriber sendNext:@"煎蛋"];
[subscriber sendCompleted];
return nil;
}];
}];
//对信号进行第二步处理
siganl = [siganl flattenMap:^RACSignal *(id value) {
NSLog(@"把%@装载盘里",value);
return [RACSignal createSignal:^RACDisposable *(id subscriber) {
[subscriber sendNext:@"上菜"];
[subscriber sendCompleted];
return nil;
}];
}];
//最后打印 最后带有===上菜
[siganl subscribeNext:^(id x) {
NSLog(@"====%@",x);
}];
/*
2020-12-29 14:31:32.718247+0800 CMF[8526:208438] 打蛋液
2020-12-29 14:31:32.718362+0800 CMF[8526:208438] 把蛋液倒进锅里面煎
2020-12-29 14:31:32.718478+0800 CMF[8526:208438] 把煎蛋装载盘里
2020-12-29 14:31:32.718561+0800 CMF[8526:208438] ====上菜
*/
}
13、Command （命令）
/// 命令
- (void)racCommand {
RACCommand *command = [[RACCommand alloc]initWithSignalBlock:^RACSignal * _Nonnull(id _Nullable input) {
NSLog(@"这是真的吗 - %@",input);
return [RACSignal createSignal:^RACDisposable * _Nullable(id _Nonnull subscriber) {
return nil;
}];
}];
[command execute:@"来了"];
/*
2020-12-29 15:20:57.876701+0800 CMF[9883:245859] 这是真的吗 - 来了
*/
}
14、Delay（延时）
/// 延时
- (void)racDelay {
RACSignal *signal = [RACSignal createSignal:^RACDisposable * _Nullable(id _Nonnull subscriber) {
[subscriber sendNext:@"延时处理"];
[subscriber sendCompleted];
return nil;
}];
[[signal delay:3] subscribeNext:^(id _Nullable x) {
NSLog(@"时间到了 - %@",x);
}];
/*
2020-12-29 14:57:54.780489+0800 CMF[9213:227273] 时间到了 - 延时处理
*/
}
15、replay
/// 重复
- (void)racReplay {
RACSignal *signal = [RACSignal createSignal:^RACDisposable * _Nullable(id _Nonnull subscriber) {
[subscriber sendNext:@"重复处理"];
[subscriber sendCompleted];
return nil;
}];
RACSignal *replaySigal = [signal replay];
[replaySigal subscribeNext:^(id _Nullable x) {
NSLog(@"replay = %@",x);
}];
[replaySigal subscribeNext:^(id _Nullable x) {
NSLog(@"replay11 = %@",x);
}];
}
16、定时器
/// 定时器，每隔3秒执行一次
- (void)racInterval {
RACSignal *signal = [RACSignal interval:3 onScheduler:[RACScheduler mainThreadScheduler]];
[signal subscribeNext:^(id _Nullable x) {
NSLog(@"xxx = %@",x);
}];
/*
2020-12-29 15:12:45.495541+0800 CMF[9622:238538] xxx = Tue Dec 29 15:12:45 2020
2020-12-29 15:12:48.496308+0800 CMF[9622:238538] xxx = Tue Dec 29 15:12:48 2020
2020-12-29 15:12:51.495188+0800 CMF[9622:238538] xxx = Tue Dec 29 15:12:51 2020
......
*/
}
17、键值绑定
RACSignal * validEmailSignal = [self.textField.rac_textSignal map:^id (NSString *value){
return @([value rangeOfString:@"@"].location != NSNotFound);
}];
RAC(self.button, enabled) = validEmailSignal;
RAC(self.textField, textColor) = [validEmailSignal map: ^id (id value){
if([value boolValue]){
return [UIColor greenColor];
}else{
return [UIColor redColor];
}
}];
文章参考整理自
1、iOS函数响应式编程以及ReactiveCocoa的使用
2、iOS ReactiveCocoa 最全常用API整理（可做为手册查询）