ios - 如何检查三个按钮条件

Question

我有三个按钮图像，我想检查它们之间的条件。当我单击按钮 1 时，表示背景图像变为蓝色。同时我点击按钮 1 它将移动到正常状态白色。另外两个按钮也一样。对于那个过程，我正在使用这段代码。 [tempBtn setSelected:! tempBtn.selected];

ButtonImageSelected = [UIImage imageNamed:@"lblue.png"];
ButtonImage = [UIImage imageNamed:@"l.png"];
button1 = [UIButton buttonWithType:UIButtonTypeCustom];
button1.frame = CGRectMake(80, 27, 36, 36);
[button1 setBackgroundImage:ButtonImage forState:UIControlStateNormal];

button1.tag = 1;
[button1 setBackgroundImage:ButtonImageSelected
                   forState:UIControlStateSelected];
button1.userInteractionEnabled = YES;
[button1 addTarget:self
              action:@selector(button1Selector:)
    forControlEvents:UIControlEventTouchDown];
[cell.contentView addSubview:button1];

另外两个按钮与按钮 1 相同。

我的条件是:单击按钮 1 意味着按钮 3 不应更改。单击按钮 3 意味着按钮 1 不应更改。按钮 2 可以在这两种条件下进行选择。我正在使用下面的代码来检查条件，但它无法正常工作。

- (void)select_id:(UIButton *)tempBtn {
  if (tempBtn.tag == 1) {
    button3.userInteractionEnabled = NO;
    [tempBtn setSelected:!tempBtn.selected];
  } else if (tempBtn.tag == 3) {
    button1.userInteractionEnabled = NO;
    [tempBtn setSelected:!tempBtn.selected];
  }
}

帮助我如何检查条件。在上面的方法中。

Answer 1

我相信您想要完成的是让每个按钮在您按下它们时改变状态。一旦您定义了按钮，您就可以通过这种方式确保它们为每个状态交替显示图像。

根据按钮按下交替显示图像

-(IBAction)buttonPressed:(id)sender {
    switch ([sender tag]) {
        case 1:
            if ([UIImagePNGRepresentation(button1.imageView.image) isEqualToData:UIImagePNGRepresentation([UIImage imageNamed:@"default1. png"])]) {
                [button1 setImage:[UIImage imageNamed:@"selected1.png"] forState:UIControlStateNormal];
            } else {
                [button1 setImage:[UIImage imageNamed:@"default1.png"] forState:UIControlStateNormal];
            }
            break;
        case 2:
            if ([UIImagePNGRepresentation(button2.imageView.image) isEqualToData:UIImagePNGRepresentation([UIImage imageNamed:@"default2. png"])]) {
                [button2 setImage:[UIImage imageNamed:@"selected2.png"] forState:UIControlStateNormal];
            } else {
                [button2 setImage:[UIImage imageNamed:@"default2.png"] forState:UIControlStateNormal];
            }
            break;
        case 3:
            if ([UIImagePNGRepresentation(button3.imageView.image) isEqualToData:UIImagePNGRepresentation([UIImage imageNamed:@"default3.png"])]) {
                [button3 setImage:[UIImage imageNamed:@"selected3.png"] forState:UIControlStateNormal];
            } else {
                [button3 setImage:[UIImage imageNamed:@"default3.png"] forState:UIControlStateNormal];
            }
            break;
        default:
            break;
    }
}

注意:确保将 Action 添加到每个按钮，并更改图像的名称

---

为每个按钮添加 Action

[button1 addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchDown];
[button2 addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchDown];
[button3 addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchDown];

---

确保您已完成以下操作:

1. 为每个按钮添加 Action
2. 相应地标记每个按钮
3. 设置每个按钮的初始图像以匹配条件