在 iOS 中禁用按钮
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Disabling a button in iOS
提问by lakesh
I need to disable a button if the key does not exist in the dictionary. I have used the setEnabled functionality of the UIButton but the image that has been set default still appears.
如果字典中不存在键，我需要禁用一个按钮。我已经使用了 UIButton 的 setEnabled 功能，但已设置为默认值的图像仍然出现。
The code looks like this:
代码如下所示：
if([self.InfoDictionary objectForKey:ButtonExist])
{
[button1 setEnabled:YES];
}
else
{
[button1 setEnabled:NO];
}
The image still appears when I run in the simulator. Need some guidance on this.
当我在模拟器中运行时，图像仍然出现。需要一些指导。
回答by Vinayak Kini
enable = YESproperty of button performs the action when clicked.
enable = YES按钮的属性在单击时执行操作。
enable = NOproperty prevents action to be executed on click.
enable = NO属性阻止在单击时执行操作。
If you want to hide the button then you can set the hiddenproperty as YESor vice versa. Other way to hide is by setting the alphaproperty to 0(invisible) or 1(visible)
如果要隐藏按钮，则可以将hidden属性设置为asYES或反之亦然。其他隐藏方法是将alpha属性设置为0(invisible) 或1(visible)
回答by iPatel
Also you can set userInteractionEnabledproperty of UIButton
你也可以设置userInteractionEnabled属性UIButton
if([self.InfoDictionary objectForKey:ButtonExist])
{
[button1 setEnabled:YES];
button1.userInteractionEnabled = YES;
}
else
{
[button1 setEnabled:NO];
button1.userInteractionEnabled = NO;
}
回答by Yashesh
use :
用 ：
if([self.InfoDictionary objectForKey:ButtonExist])
{
[button1 setHidden:YES];
}
else
{
[button1 setHidden:NO];
}
if you want to hide UIImage of UIButton then:
如果你想隐藏 UIButton 的 UIImage 则：
if([self.InfoDictionary objectForKey:ButtonExist])
{
[button1 setBackgroundImage:[UIImage imageNamed:@"YOUR IMAGE"] forState:UIControlStateNormal];
}
else
{
[button1 setBackgroundImage:[UIImage imageNamed:@""] forState:UIControlStateNormal];
}
Hope this will help you. All the best !!!
希望这会帮助你。祝一切顺利 ！！！
回答by Jonghee Park
in swift3:
在swift3中：
self.button.isEnabled = false
回答by Seamus
Ran into this myself. The problem was that I was inadvertently enabling the button in a gesture handler for tap!
我自己遇到了这个。问题是我无意中启用了手势处理程序中的按钮以进行点击！
Look for side effects like this.
寻找这样的副作用。
