按下UIButton的UIControlState是什么？

Question

我在UIButton这里以编程方式自定义:

button = [UIButton buttonWithType:UIButtonTypeCustom];
        [button setSelected:YES];
        button.frame = CGRectMake(x, y, width, height);
        [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        [button setTitleColor:[UIColor blueColor] forState:UIControlStateSelected];
        [button setTitle:@"Button Title" forState:UIControlStateNormal];
        [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
        [button setBackgroundImage:[UIImage imageNamed:@"button.png"] forState:UIControlStateNormal];
        [button setBackgroundImage:[UIImage imageNamed:@"buttonActive.png"] forState:UIControlStateSelected];
        [button setBackgroundImage:[UIImage imageNamed:@"buttonActive.png"] forState:UIControlStateHighlighted];
        [button setBackgroundImage:[UIImage imageNamed:@"buttonActive.png"] forState:UIControlStateDisabled];

问题是,如果我按住图像背景图像消失,直到我发布它...

Answer 1

我认为你处于矫枉过正的模式:).尝试为UIControlStateNormal设置button.png,为UIControlStateHighlighted设置buttonActive.png.不需要其余的.看看这是否有效.

编辑:

另外,请记住:图像文件名称区分大小写

你在设备上测试吗？图像名称区分大小写对于设备构建,但不适用于模拟器.例如,如果您的实际图像文件名为buttonactive.png,但您从代码中将其称为buttonActive.png,它将显示在模拟器上,但不会显示在设备上.

请确保两个图像名称的大小写与实际文件的名称相匹配.

编辑#2:

试试这个代码

button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setSelected:YES];
    button.frame = CGRectMake(x, y, width, height);
    [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [button setTitleColor:[UIColor blueColor] forState:UIControlStateSelected];
    [button setTitle:@"Button Title" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
    [button setBackgroundImage:[UIImage imageNamed:@"button.png"] forState:UIControlStateNormal];
    [button setBackgroundImage:[UIImage imageNamed:@"buttonActive.png"] forState:UIControlStateHighlighted];