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1. 棣栧厛鍦╒iewModel涓畾涔変竴涓睘鎬э紝鐢ㄤ簬瀛樺偍瑕佺粦瀹氱殑鏁版嵁锛?/li>

@interface ViewModel : NSObject

@property (nonatomic, copy) NSString *text;

@end

2. 鍦╒iewController涓紩鍏eactiveCocoa锛屽苟鍦╲iewDidLoad鏂规硶涓繘琛屽弻鍚戠粦瀹氾細

#import <ReactiveCocoa/ReactiveCocoa.h>

@interface ViewController ()

@property (nonatomic, strong) ViewModel *viewModel;
@property (nonatomic, strong) UITextField *textField;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.textField = [[UITextField alloc] initWithFrame:CGRectMake(20, 100, 200, 30)];
    [self.view addSubview:self.textField];

    self.viewModel = [[ViewModel alloc] init];

    // 鍙屽悜缁戝畾
    RACChannelTo(self.viewModel, text) = RACChannelTo(self.textField, text);

    [[RACObserve(self.viewModel, text) skip:1] subscribeNext:^(NSString *text) {
        // 澶勭悊鏁版嵁鍙樺寲
        NSLog(@"Text changed: %@", text);
    }];
}

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