QString to short using toShort

问题

I want to convert QString to short.when I try this code

ui->lineEdit->text().toShort();

It works well for text = 20 but it returns "0" for value = 20.5.

but I need value = 20. how can I solve it?

回答1:

The reason that 0 is returned is because a decimal point is an invalid character for the short data type.

If you want to be able to convert floating-point numbers from QString to integers, you need to convert your text to a float or double first, then use normal rounding/truncation to convert to short.

回答2:

use that convertion string:

ui->lineEdit->text()->split(".")[0].toShort(0,10);

来源：https://stackoverflow.com/questions/21133389/qstring-to-short-using-toshort