ios - 延迟后如何切换回原始按钮图像(obj-c)？

Question

您好，我正在尝试制作一个简单的应用程序，其中包含点击时更改图像的按钮。我希望他们在延迟 2 - 3 秒后切换回原始状态。我是 objective-c 的新手，不知道该怎么做。我尝试了以下代码的变体。由于有几个按钮，我需要保留发件人 ID 或图像名称。提前致谢!

- (IBAction)playSound:(id)sender {   
    UIImage *newImage = [UIImage imageNamed:@"new.jpg"];
    [sender setImage:newImage forState:UIControlStateNormal];

    [NSThread sleepForTimeInterval:3];

    UIImage *origImage = [UIImage imageNamed:@"orig.jpg"];
    [sender setImage:origImage forState:UIControlStateNormal];
}

Answer 1

为您的按钮添加两个目标 StateHighlighted 和 StateNormal，例如,,,

[myButton setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"%d.png", i]] forState:UIControlStateNormal];
[myButton setBackgroundImage:[UIImage imageNamed:[NSString stringWithFormat:@"%d-active.png", i]] forState:UIControlStateHighlighted]
[myButton addTarget:self action:@selector(buttonMenuPressed:) forControlEvents:UIControlEventTouchUpInside];
[myButton addTarget:self action:@selector(gotoList:) forControlEvents:UIControlStateHighlighted];