今天遇见了UITextField的使用
1.监听输入的状态
[[self.textField rac_signalForControlEvents:UIControlEventEditingDidBegin] subscribeNext:^(UITextField *sender) {
@strongify(self);
NSLog(@”tag is %@”,@(sender.tag));
}];

1. 监控输入的内容
   [self.textField.rac_textSignal subscribeNext:^(id x) {

   NSLog(@"content is %@",x);
   

   }];