iphone - UILabel value not changing -

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I have established a UILB (declared in H). In the Viewdupputer method, if I type myLabel.text = @ ""; , then it works. But somewhere I place this same exact line, nothing happens on the label, the label is in a custom cell view controller, which uses another UITableView class as its custom cell. So I thought I had to reload the table after making changes, but she did not work either. Even in the WillAppear method of seeing it works only, not only Dippear. Any ideas?

Try this: 

  self.myLabel.text = @ " ";

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