Objective c 取消RAC命令执行
有没有办法取消执行Objective c 取消RAC命令执行,objective-c,cocoa,reactive-cocoa,raccommand,Objective C,Cocoa,Reactive Cocoa,Raccommand,有没有办法取消执行RACCommand 例如,我有一个具有无限执行信号的命令,如下所示: RACCommand *command = [[RACCommand alloc] initWithSignalBlock:^RACSignal *(id input) { return [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) { __block BOOL stop =
RACCommand
例如,我有一个具有无限执行信号的命令,如下所示:
RACCommand *command = [[RACCommand alloc] initWithSignalBlock:^RACSignal *(id input) {
return [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
__block BOOL stop = NO;
while (!stop) {
[subscriber sendNext:nil];
}
return [RACDisposable disposableWithBlock:^{
stop = YES;
}];
}];
}];
RACCommand*command=[[RACCommand alloc]initWithSignalBlock:^RACSignal*(id输入){
返回[RACSignal createSignal:^RACSignal*(id订户){
__块布尔停止=否;
当(!停止){
[用户发送下一步:无];
}
返回[RAC一次性处置带块:^{
停止=是;
}];
}];
}];
那么,在调用
[命令执行:nil]
之后,如何停止它呢?我对RACCommand有点陌生,所以我不确定是否有更好的方法来完成此操作。但我一直在使用带有取消信号的takeUntil:
来停止执行
RACCommand *command = [[RACCommand alloc] initWithSignalBlock:^RACSignal *(id input) {
return [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
while (true) {
[subscriber sendNext:nil];
}
}] takeUntil:cancellationSignal];
}];
RACCommand*command=[[RACCommand alloc]initWithSignalBlock:^RACSignal*(id输入){
返回[RACSignal createSignal:^RACSignal*(id订户){
while(true){
[用户发送下一步:无];
}
}]takeUntil:取消信号];
}];
太好了,谢谢!这里有更多的信息