Question

因此,我拥有一支由下游和后ton子组成的纳巴禁运主计长,使用固定的Left BarButtonItem,并设置了BarButtonItem。我在下表中列出了一些案文领域:当有人在案文领域作主时,我想要改变bar,以改变bar。

a) remove or hide the Cancel and Save buttons b) add a done button to close the keyboard or datepicker

When using setRightBarButtonItem/setLeftBarButonItem I can t actually remove or hide the Cancel/Save buttons... only disable them.

因此,我的问题是,当有人用一个文字现场显示不同的纽埃勒巴拉时,我怎么能表现出不同的乌托勒巴拉?

Answer 1

首先,如果你已经这样做,你想要再设置一个工具。改变工具条形名称,使用相同的纽州。

应采取的步骤。

add Delegate to textfields. (So you can use textfield delegate methods to change the title name of buttons when textfield begins editing & ended.)

2.performing action on left & right button check for the condition. i.e

UIBarButton *the_button = (UIBarButton *)sender;

if([[the_button.currentTitle] isEqualToString:@"Save"])
{
//perform some action
}

else 
{
//perform else condition
}

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