ReactiveCocoaノート3

RACのいくつかの使い方

1.KVOの代わりに

    [self.view rac_observeKeyPath:@"frame" options:NSKeyValueObservingOptionNew observer:nil block:^(id value, NSDictionary *change, BOOL causedByDealloc, BOOL affectedOnlyLastComponent) {
        
    }];

    [[self.view rac_valuesForKeyPath:@"frame" observer:nil] subscribeNext:^(id x) {
        
    }];

2.リスニングイベント

[[_btn rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(id x) {
        NSLog(@" ");
    }];

3.代替通知

    [[[NSNotificationCenter defaultCenter] rac_addObserverForName:UIKeyboardWillShowNotification object:nil] subscribeNext:^(id x) {
        NSLog(@" ");
    }];

4.テキストボックスの変更を傍受する

    [_textField.rac_textSignal subscribeNext:^(id x) {
        NSLog(@"%@", x);
    }];

5.代替エージェント

    // 1. :1.RACSubject 2.rac_signalForSelector
    //  , RACSubject
    [[_redView rac_signalForSelector:@selector(btnClick:)] subscribeNext:^(id x) {
        NSLog(@" ");
    }];