检测 UIButton iOS 的选定状态答案

【问题标题】：Detect Selected State of UIButton iOS检测 UIButton iOS 的选定状态
【发布时间】：2014-08-21 09:45:47
【问题描述】：

如何检测 uibutton 的选中状态？

我有 7 个按钮，我让它们能够一次切换或选择多个按钮。

当我按下完成按钮时，我希望能够知道哪些按钮处于选中状态。

因此，如果选择了 M、T 和 W，那么我希望能够在推送完成时检测到这一点。

我目前在按钮上放了一个标签，然后调用一个方法来取消选择或选择多个按钮。

self.repeatOccurrenceFrequencyWeeklyTF = [[UITextField alloc]init];
self.repeatOccurrenceFrequencyWeeklyTF.frame = CGRectMake(80, 80, 32, 32);
self.repeatOccurrenceFrequencyWeeklyTF.delegate = self;
self.repeatOccurrenceFrequencyWeeklyTF.background = [UIImage imageNamed:@"repeatWeekly"];
self.repeatOccurrenceFrequencyWeeklyTF.font = [UIFont fontWithName:@"SegoeWP" size:15];
self.repeatOccurrenceFrequencyWeeklyTF.textColor = [UIColor appGreyText];
[self.repeatOccurrenceFrequencyWeeklyTF setValue:[UIColor colorWithRed:153/255.0 green:153/255.0 blue:153/255.0 alpha:1.0] forKeyPath:@"_placeholderLabel.textColor"];
self.repeatOccurrenceFrequencyWeeklyTF.placeholder = @"1";
UIView *leftView1 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 12, self.repeatOccurrenceFrequencyWeeklyTF.frame.size.height)];
self.repeatOccurrenceFrequencyWeeklyTF.leftView = leftView1;
self.repeatOccurrenceFrequencyWeeklyTF.leftViewMode = UITextFieldViewModeAlways;
self.repeatOccurrenceFrequencyWeeklyTF.rightViewMode = UITextFieldViewModeAlways;
self.keyboardToolbar = [self createInputToolbar];
self.repeatOccurrenceFrequencyWeeklyTF.inputAccessoryView = self.keyboardToolbar;
self.repeatOccurrenceFrequencyWeeklyTF.delegate = self;
self.repeatOccurrenceFrequencyWeeklyTF.keyboardType = UIKeyboardTypeNumberPad;
self.repeatOccurrenceFrequencyWeeklyTF.enabled = NO;
[self.view addSubview:self.repeatOccurrenceFrequencyWeeklyTF];

// Now, in your button action handler, you can do something like this:
- (void)mondayButtonTouch:(UIButton *)aButton withEvent:(UIEvent *)event
{
aButton.selected = !aButton.selected;

if(aButton.tag == 111) {

}

if(aButton.tag == 222) {

}

if(aButton.tag == 333) {

}

if(aButton.tag == 444) {

}

if(aButton.tag == 555) {

}

if(aButton.tag == 666) {

}

NSLog(@"dsfdfdfsdfs %ld", (long)aButton.tag);
[aButton setTitleColor:[UIColor whiteColor] forState:UIControlStateSelected];

}

【问题讨论】：

使用NSMutableArray 存储uibutton 标签并使用这个数组来满足你的需要
您也可以使用 IBOutletCollection，当按下完成按钮时，您可以遍历数组并检查选择了哪个按钮。

标签： ios objective-c iphone uibutton

【解决方案1】：

我会使用NS_ENUM（这有助于保持代码美观且易读）和NSMutableArray 来跟踪您选择的按钮。声明一个如下所示的枚举：

typedef NS_ENUM(NSInteger, Weekday) {
WeekdayMonday,
WeekdayTuesday,
WeekdayWednesday,
WeekdayThursday,
WeekdayFriday,
WeekdaySaturday,
WeekdaySunday
};

然后用正确的枚举标记你的按钮：

tuesdayButton.tag = WeekdayTuesday;

当你点击按钮时检查你的枚举是否存在于你的数组中：

- (void)buttonTouch:(UIButton *)aButton withEvent:(UIEvent *)event
{
if ([array containsObject:@(aButton.tag)]){ //exists, remove it from array
    [array removeObjectIdenticalTo:@(aButton.tag)];
    }
}else{
    [array addObject:@(aButton.tag)];
}

}

【讨论】：

【解决方案2】：

一种可能性是创建一个名为selectedButton 的NSMutableArray。这样做：

- (void)mondayButtonTouch:(UIButton *)aButton withEvent:(UIEvent *)event
{
    aButton.selected = !aButton.selected;

    if(!aButton.selected && selectedButton.containsObject(aButton.Tag)) {
        [selectedButton removeObject:aButton.tag];
    }
    else if(aButton.selected && !selectedButton.containsObject(aButton.Tag)) {
        [selectedButton addObject:aButton.tag];          
    }


    // do your stuff here
}

现在在done 按钮上单击，所有被选中标签的按钮都可以使用selectedButton 数组进行跟踪。

你可以使用：

[self.view viewWithTag:yourTagHere]

【讨论】：

【解决方案3】：

你可以用这个：

for (UIButton *btn in [self.view subviews]) { // self.view (change it with your button superview)
    if ([btn isKindOfClass:[UIButton class]] && [btn isSelected] == YES) {
        // here you found the button which is selected
    }
}

【讨论】：

【解决方案4】：

[self.view viewWithTag:yourTagHere] 替换

【讨论】：