ios - UIButton 未显示在 UIViewController 中

Question

我已经这样设置了我的按钮:

CGRect button1Frame = CGRectMake(200, 200, 100, 100);
self.button1 = [[UIButton alloc] initWithFrame:button1Frame];
[self.button1 addTarget:self action:@selector(goToController1:)
 forControlEvents:UIControlEventTouchDown];
self.button1.userInteractionEnabled = YES;
self.button1.opaque = YES;
self.button1.backgroundColor = [UIColor redColor];
[self.button1 setTitle:@"B1" forState:UIControlStateNormal];
[self.view addSubview:self.button1];

与我的发件人:

- (void) goToController1:(id)sender {
    NSLog(@"Pressed");
}

并且我的 View Controller 已正确初始化。什么会导致我的按钮不显示？我已经检查以确保一切都被正确调用。

Answer 1

你可以试试这个:

button = [UIButton buttonWithType: UIButtonTypeSystem];

然后像这样设置框架:

button.frame = CGRectMake(0,0,20,20);

UIButton buttonWithType: 方法一次性解决了我的问题。不确定在这种情况下是否会有所作为。只是一些尝试。