UIButton没有出现在UIViewController中

Question

我已经设置了我的按钮:

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");
}

我的视图控制器已正确初始化.什么会导致我的按钮不显示？我检查过以确保所有内容都被正确调用.

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:方法一度解决了我的问题.不知道在这种情况下是否会有所作为.只是尝试一下.