Question

我在工具栏中添加了一个自定义按钮并设置了属性setEnabled：NO但该按钮未显示为灰色使用SDK 4.0加载视图时。但是，如果使用SDK 3.1.2编译相同的代码，则按钮显示为灰色。有什么想法吗？

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    UIImage* pImage = [UIImage imageNamed:@"Test.png"];

    CGRect TestBtnFrame = CGRectMake(0, 0, pImage.size.width, pImage.size.height);
    UIButton* pTestBtn = [[UIButton alloc] initWithFrame:TestBtnFrame];

    [pTestBtn setTitle:@"  Test" forState:UIControlStateNormal];
    [pTestBtn addTarget:self action:@selector(OnTestBtnClick)   forControlEvents:UIControlEventTouchUpInside];      
    [pTestBtn setBackgroundImage:image forState:UIControlStateNormal];

    // [pTestBtn setEnabled:NO];     

    // Class member variable to be released in dealloc
    m_pTestBarBtn = [[UIBarButtonItem alloc] initWithCustomView: pTestBtn];
    [pTestBtn release]; 

    [m_pTestBarBtn setEnabled:NO];

    [self setToolbarItems:[NSArray arrayWithObjects: m_pTestBarBtn, nil] animated:YES];

}

Answer 1

您忘记为禁用状态设置背景图片...

[ pTestBtn setBackgroundImage: **imageDisabled** forState: UIControlStateDisabled ];

如何使ToolbarItems上的setEnabled与SDK 4.0 -iPhone一起使用

1 个答案: