iOS first Article-xcode6.2 keyboard cannot be tuned out

iOS first post

I don't know if anyone has ever come across an iOS code call keyboard (keyboard) does not come out of the situation, anyway I was met, press the official document to call keyboard events very easy in fact:

After I used, I do not know why, the keyboard is not displayed, look at other people's code is entrusted with the. I think the official website is not required to entrust Ah, so all kinds of Google and Baidu, the result is still like that. Just don't show, change all kinds of writing can not. Finally see people Code execution Environment is Xcode4.6 My is 6.2, I changed Xcode to 5.0 just fine. Then change back to 6.2 is normal, or put on the hook:

The problem is over. I hope this problem will not appear in the future. For this leave some mark, hope can be convenient others also convenient oneself. iOS is in progress.

iOS first Article-xcode6.2 keyboard cannot be tuned out