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在OS X 10.10 的 AppKit 发行说明中，Apple 写道：

NSMatrix 的使用已被非正式地弃用。我们希望在后续版本中添加正式的弃用宏，但同时不鼓励使用它。NSMatrix 的主要用途是单选按钮组，因此请记住，对于链接在 10.8 或更高版本上的应用程序，共享相同父视图和操作的单选按钮将作为一个组运行。

这一切都很好，但是在使用独立按钮时管理无线电组很烦人。

我搜索了其他人关于如何处理这个问题的建议，以避免必须state单独设置每个按钮，找到选定的收音机等，但找不到太多关于它的讨论。我想大多数人都在等待 Apple 正式弃用NSMatrix，并希望提供更好的机制。

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1 回答 1

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因此，在回答我自己的问题时，我在我的DejalAppKitCategories 开源项目中添加了一些方法以使这更容易，并认为我会在这里与其他想要避免的人分享NSMatrix。

这是标题：

@interface NSButton (DejalRadios)

@property (nonatomic, setter=dejal_setRadiosEnabled:) BOOL dejal_radiosEnabled;

- (void)dejal_selectRadioWithTag:(NSInteger)tag;
- (NSInteger)dejal_selectedRadioTag;

- (NSButton *)dejal_radioPassingTest:(BOOL (^)(NSButton *radio, BOOL *stop))predicate;
- (void)dejal_enumerateRadiosUsingBlock:(void (^)(NSButton *radio, BOOL *stop))block;

@end

和实施：

@implementation NSButton (DejalRadios)

/**
Assuming the receiver is a radio button, finds other radio buttons in the group (i.e. in the same superview and with the same action) and selects the one with the specified tag.  Invoke this on any of the radios in the group.  A replacement for -[NSMatrix selectCellWithTag:].

@param tag The tag value to select.

@author DJS 2015-01.
*/

- (void)dejal_selectRadioWithTag:(NSInteger)tag;
{
    [self dejal_enumerateRadiosUsingBlock:^(NSButton *radio, BOOL *stop)
     {
         radio.state = radio.tag == tag;
     }];
}

/**
Assuming the receiver is a radio button, finds other radio buttons in the group (i.e. in the same superview and with the same action) and returns the tag value of the selected radio.  Invoke this on any of the radios in the group.  A replacement for -[NSMatrix selectedTag].

@returns A tag value integer.

@author DJS 2015-01.
*/

- (NSInteger)dejal_selectedRadioTag;
{
    NSButton *foundRadio = [self dejal_radioPassingTest:^BOOL(NSButton *radio, BOOL *stop)
     {
         return radio.state;
     }];

    return foundRadio.tag;
}

/**
Returns YES if the radio group is enabled, or NO if not.  Simply returns the state of the receiver; the others are assumed to be the same.  (If you want to know if they are all enabled or disabled, probably best to use -dejal_enumerateRadiosUsingBlock: to scan the group, and handle a mixed case as needed.)

@author DJS 2015-01.
*/

- (BOOL)dejal_radiosEnabled;
{
    return self.enabled;
}

/**
Sets all of the radios in the group to be enabled or disabled.  A replacement for -[NSMatrix setEnabled:].

@author DJS 2015-01.
*/

- (void)dejal_setRadiosEnabled:(BOOL)enabled;
{
    [self dejal_enumerateRadiosUsingBlock:^(NSButton *radio, BOOL *stop)
     {
         radio.enabled = enabled;
     }];
}

/**
Assuming the receiver is a radio button, finds other radio buttons in the group (i.e. in the same superview and with the same action) and performs the block for each of them, passing the radio to the block.  Returns the one that returns YES, or nil if the block requests to stop before completion, or it completes without the block returning YES.  Invoke this on any of the radios in the group.

@param block A block that takes a radio button and stop boolean reference as parameters and returns a boolean.
@returns The found radio button, or nil if none is found.

@author DJS 2015-01.
*/

- (NSButton *)dejal_radioPassingTest:(BOOL (^)(NSButton *radio, BOOL *stop))predicate;
{
    for (NSButton *radio in self.superview.subviews)
    {
        // There's no reliable way to determine if a button is actually a radio button, but it's reasonable to assume that no non-radio will have the same action (and having the same action is what makes it a member of the group):
        if ([radio isKindOfClass:[NSButton class]] && radio.action == self.action && predicate)
        {
            BOOL stop = NO;

            if (predicate(radio, &stop))
            {
                return radio;
            }

            if (stop)
            {
                return nil;
            }
        }
    }

    return nil;
}

/**
Assuming the receiver is a radio button, finds other radio buttons in the group (i.e. in the same superview and with the same action) and performs the block for each of them, passing the radio to the block.  Invoke this on any of the radios in the group.

@param block A block that takes a radio button and stop boolean reference as parameters and returns void.

@author DJS 2015-01.
*/

- (void)dejal_enumerateRadiosUsingBlock:(void (^)(NSButton *radio, BOOL *stop))block;
{
    for (NSButton *radio in self.superview.subviews)
    {
        // There's no reliable way to determine if a button is actually a radio button, but it's reasonable to assume that no non-radio will have the same action (and having the same action is what makes it a member of the group):
        if ([radio isKindOfClass:[NSButton class]] && radio.action == self.action && block)
        {
            BOOL stop = NO;

            block(radio, &stop);

            if (stop)
            {
                return;
            }
        }
    }
}

@end

要使用这些方法，只需调用组中的任何无线电，例如

[self.iconNoneRadio dejal_selectRadioWithTag:self.statusIconKind];
self.iconNoneRadio.dejal_radiosEnabled = use;

和：

- (IBAction)chooseIcon:(id)sender;
{
    self.statusIconKind = self.iconNoneRadio.dejal_selectedRadioTag;

    [self maintainControls];
}

我希望这对其他人有帮助！当然，如果我遗漏了任何明显的内容，或者您​​有任何建议或意见，请告诉我。

于 2015-01-25T01:29:16.807 回答