Question

带有4个按钮的应用程序 - 只想控制它们的行为 - 即按下按钮并在启用其他按钮时禁用该按钮。

从其他问题/答案中，我创建了以下.h条目：

@interface TestButtonsViewController : UIViewController
- (IBAction)b1:(id)sender;
- (IBAction)b2:(id)sender;
- (IBAction)b3:(id)sender;
- (IBAction)b4:(id)sender;

@property (retain, nonatomic) IBOutlet UIButton *b1;
@property (retain, nonatomic) IBOutlet UIButton *b2;
@property (retain, nonatomic) IBOutlet UIButton *b3;
@property (retain, nonatomic) IBOutlet UIButton *b4;

和.m

- (IBAction)b1:(id)sender {

UIButton *b1 = (UIButton *) sender;
b1.enabled = NO;
UIButton *b2 = (UIButton *) sender;
b2.enabled = YES;
UIButton *b3 = (UIButton *) sender;
b3.enabled = NO;
UIButton *b4 = (UIButton *) sender;
b4.enabled = NO;
}

- (IBAction)b2:(id)sender {

UIButton *b1 = (UIButton *) sender;
b1.enabled = NO;
UIButton *b2 = (UIButton *) sender;
b2.enabled = NO;
UIButton *b3 = (UIButton *) sender;
b3.enabled = YES;
UIButton *b4 = (UIButton *) sender;
b4.enabled = NO;
}

- (IBAction)b3:(id)sender {

UIButton *b1 = (UIButton *) sender;
b1.enabled = NO;
UIButton *b2 = (UIButton *) sender;
b2.enabled = NO;
UIButton *b3 = (UIButton *) sender;
b3.enabled = NO;
UIButton *b4 = (UIButton *) sender;
b4.enabled = YES;
}

- (IBAction)b4:(id)sender {

UIButton *b1 = (UIButton *) sender;
b1.enabled = YES;
UIButton *b2 = (UIButton *) sender;
b2.enabled = YES;
UIButton *b3 = (UIButton *) sender;
b3.enabled = YES;
UIButton *b4 = (UIButton *) sender;
b4.enabled = NO;
}

当我保存，构建，运行并按下从1开始按下按钮时，按下按钮1和2后按下它们后禁用;但是当我按3时它没有;此外，当我按4时，它不会启用1和2.

Answer 1

您的逻辑对于您想要执行的操作是不正确的行为，您无法从同一发件人转换多个按钮并期望它们正常运行。使用您已有的属性并尝试：

- (IBAction)b1:(id)sender 
{
    self.b1.enabled = NO;
    self.b2.enabled = YES;
    self.b3.enabled = NO;
    self.b4.enabled = NO;
}

- (IBAction)b2:(id)sender 
{
    self.b1.enabled = NO;
    self.b2.enabled = NO;
    self.b3.enabled = YES;
    self.b4.enabled = NO;
}

- (IBAction)b3:(id)sender 
{
    self.b1.enabled = NO;
    self.b2.enabled = NO;
    self.b3.enabled = NO;
    self.b4.enabled = YES;
}

- (IBAction)b4:(id)sender 
{
    self.b1.enabled = YES;
    self.b2.enabled = YES;
    self.b3.enabled = YES;
    self.b4.enabled = NO;
}

Answer 2

您要找的是Button。 userInteractionEnabled =否

Xcode 5.1 - 按钮禁用/启用不工作？

2 个答案: