QTime and QDate from String

[Eleasar]

I have QString keeps dates like 2014-11-23 06:55:59
I want to parse this QString to QDate and QTime.

I've tried

QDate myDate;
myDate = QDate::fromString(qStr,"yyyy-MM-dd HH:mm:ss");

QDate myDate;
myDate = QDate::fromString(qStr,"yyyy-MM-dd HH:mm:ss");

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When i debug the code, i see QString value correctly, but mydate has no value. How can i fix it?