Question

如何更改按钮的文本并禁用iOS中的按钮？

Answer 1

嘿Namratha，如果您要求更改UIButton的文本和启用/禁用状态，可以很容易地完成，如下所示;

[myButton setTitle:@"Normal State Title" forState:UIControlStateNormal]; // To set the title
[myButton setEnabled:NO]; // To toggle enabled / disabled

如果您已在Interface Builder中创建了按钮并希望在代码中访问它们，则可以利用它们作为参数传递给IBAction调用的事实：

- (IBAction) triggerActionWithSender: (id) sender;

这可以绑定到按钮，当触发操作时，您将获得sender参数中的按钮。如果这还不够（因为您需要访问除操作之外的其他位置的按钮），请声明按钮的插座：

@property(retain) IBOutlet UIButton *someButton;

然后可以将IB中的按钮绑定到控制器，NIB加载代码将在加载接口时设置属性值。

Answer 2

[myButton setTitle: @"myTitle" forState: UIControlStateNormal];

使用UIControlStateNormal设置标题。

UI按钮提供了几种状态，您可以查看：

[myButton setTitle: @"myTitle" forState: UIControlStateApplication];
[myButton setTitle: @"myTitle" forState: UIControlStateHighlighted];
[myButton setTitle: @"myTitle" forState: UIControlStateReserved];
[myButton setTitle: @"myTitle" forState: UIControlStateSelected];
[myButton setTitle: @"myTitle" forState: UIControlStateDisabled];

Answer 3

如果正在寻找Swift解决方案的人来到这里，那就是：

myButton.isEnabled = false // disables
myButton.setTitle("myTitle", for: .normal) // sets text

文档：isEnabled，setTitle 。

旧代码：

myButton.enabled = false // disables
myButton.setTitle("myTitle", forState: UIControlState.Normal) // sets text

Answer 4

假设按钮是UIButton：

UIButton *button = …;
[button setEnabled:NO]; // disables
[button setTitle:@"Foo" forState:UIControlStateNormal]; // sets text

请参阅UIButton的文档。

Answer 5

更改按钮标题：

[mybtn setTitle:@"My Button" forState:UIControlStateNormal];
[mybtn setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];

禁用：

[mybtn setEnabled:NO];

Answer 6

在Swift 3中，您只需通过以下方式更改按钮的标题：

button.setTitle("Title", for: .normal)

并通过以下方式禁用按钮：

button.isEnabled = false

.normal与UIControlState.normal相同，因为推断了类型。

Answer 7

如果要将标题更改为对被点击的响应，可以在视图控制器委托中按钮的IBAction方法中尝试。这会打开和关闭语音聊天。此处不涉及设置语音聊天！

- (IBAction)startChat:(id)sender {
UIButton *chatButton = (UIButton*)sender;
if (!voiceChat.active) {
    UIAlertController* alert = [UIAlertController alertControllerWithTitle:@"Voice Chat"
                                                                   message:@"Voice Chat will become live. Please be careful with feedback if your friend is nearby."
                                                            preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction* defaultAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault
                                                          handler:^(UIAlertAction * action) {}];
    [alert addAction:defaultAction];
    [self presentViewController:alert animated:YES completion:nil];
    [voiceChat start];
    voiceChat.active = YES;
    [chatButton setTitle:@"Stop Chat" forState:UIControlStateNormal];
}
else {
    [voiceChat stop];
    UIAlertController* alert = [UIAlertController alertControllerWithTitle:@"Voice Chat"
                                                                   message:@"Voice Chat is closed"
                                                            preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction* defaultAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault
                                                          handler:^(UIAlertAction * action) {}];

    [alert addAction:defaultAction];
    [self presentViewController:alert animated:YES completion:nil];
    voiceChat.active = NO;
    [chatButton setTitle:@"Chat" forState:UIControlStateNormal];
}

}

voiceChat当然特定于语音聊天，但您可以使用ow本地布尔属性来控制切换。

Answer 8

SWIFT 4 （带有扩展名）

设置：

// set button label for all states
extension UIButton {
    public func setAllStatesTitle(_ newTitle: String){
        self.setTitle(newTitle, for: .normal)
        self.setTitle(newTitle, for: .selected)
        self.setTitle(newTitle, for: .disabled)
    }
}

并使用：

yourBtn.setAllStatesTitle("btn title")

更改按钮的文本并禁用iOS中的按钮

8 个答案: