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我在一个方法中设置了 10 个左右的按钮，如下所示：

@implementation MyViewController
UIButton *originalButton;

etc...

- (void)setupButtons
{
    originalButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [originalButton addTarget:self action:@selector(originalButtonWasPressed:) forControlEvents:UIControlEventTouchUpInside];
    originalButton.frame = CGRectMake(20.0, 30.0, 100.0, 39.0);
    UIImage *buttonImage = [[UIImage imageNamed:@"originalreg.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(18, 18, 18, 18)];
    UIImage *buttonImageHighlight = [[UIImage imageNamed:@"originalregblue.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(18, 18, 18, 18)];
    [originalButton setBackgroundImage:buttonImage forState:UIControlStateNormal];
    [originalButton setBackgroundImage:buttonImageHighlight forState:UIControlStateHighlighted];
    [self.view addSubview:originalButton];

    etc…
}

为了提高效率，我决定将通用代码提取到另一种方法中：

- (void)setupButton:(UIButton *)myButton withSelector:(SEL)selector withX:(CGFloat)x withY:(CGFloat)y withRegImage:(NSString *)regImage withHighlightImage:(NSString *)highlightImage
{
    myButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [myButton addTarget:self action:selector forControlEvents:UIControlEventTouchUpInside];
    myButton.frame = CGRectMake(x, y, 100.0, 39.0);
    UIImage *buttonImage = [[UIImage imageNamed:regImage] resizableImageWithCapInsets:UIEdgeInsetsMake(18, 18, 18, 18)];
    UIImage *buttonImageHighlight = [[UIImage imageNamed:highlightImage] resizableImageWithCapInsets:UIEdgeInsetsMake(18, 18, 18, 18)];
    [myButton setBackgroundImage:buttonImage forState:UIControlStateNormal];
    [myButton setBackgroundImage:buttonImageHighlight forState:UIControlStateHighlighted];
    [self.view addSubview:myButton];
}

…并这样称呼它：

- (void)setupButtons
{
    [self setupButton:originalButton withSelector:@selector(originalButtonWasPressed:) withX:20.0 withY:30.0 withRegImage:@"originalreg.png" withHighlightImage:@"originalregblue.png"];

    etc...
}

这一切都有效，除了我的一个按钮用于隐藏所有其他按钮。在原始设置中，按下“隐藏按钮”按钮会导致其他按钮被隐藏。现在，它们仍然在屏幕上。这是代码：

[self setupButton:hideButtonsButton withSelector:@selector(hideButtonsButtonWasPressed:) withX:20.0 withY:530.0 withRegImage:@"hidebuttonsreg.png" withHighlightImage:@"hidebuttonsregblue.png"];

- (void)hideButtonsButtonWasPressed:(id)sender
{
    // hide the buttons
    originalButton.hidden = YES;
    originalButton.enabled = NO;

    etc…
}

我已经确认正在调用此方法并且setHidden/setEnabled正在执行调用。

任何指点都感激不尽！托尼。

4

1 回答 1

2

这是因为您的方法一直使用单个实例。查看初始化的第一行

myButton = [UIButton buttonWithType:UIButtonTypeCustom];

将此行替换为

UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom];

每次都会返回新的按钮实例。

您已经声明了如下所示的按钮实例，对。

IBOutlet UIButton *btn1, *btn2, *btn3;

现在像以前一样使用您的方法创建一个新按钮，只需将该按钮分配给受尊重的按钮对象

btn1 = [self setupButton:originalButton withSelector:@selector(originalButtonWasPressed:) withX:20.0 withY:30.0 withRegImage:@"originalreg.png" withHighlightImage:@"originalregblue.png"];

btn2 = [self setupButton:originalButton withSelector:@selector(duplicateButtonWasPressed:) withX:20.0 withY:30.0 withRegImage:@"duplicatereg.png" withHighlightImage:@"originalregblue.png"];

btn3 = [self setupButton:originalButton withSelector:@selector(olderButtonWasPressed:) withX:20.0 withY:30.0 withRegImage:@"olderreg.png" withHighlightImage:@"originalregblue.png"];
于 2013-03-24T16:35:45.093 回答