通过UIButton切换视图？

Question

我有一个Xcode项目，想要从一个文件切换视图，文件名是Score（没有xib，只有Score.h和Score.m）到主文件（它的名字是View并且有一个XIB ）在我的文件Score.m中使用UIbutton，但我不能这样做..

使用此代码：

UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeCustom];
btn1.frame = CGRectMake(200, 400, img3.size.width/2, img3.size.height/2);
[btn1 setImage:img3 forState:UIControlStateNormal];
[btn1 setImage:img4 forState:UIControlStateDisabled];
[self addSubview:btn1];

if(btn1.selected) {
    View *second =[[View alloc] initWithNibName:nil bundle:nil];
    [self presentModalViewController:second animated:YES];
}

我收到此错误：Receiver type 'Score' for instance message doesn't declare a method with selector 'presentModalViewController : animated

请帮忙。

Answer 1

您收到的错误消息表明，Score（您尝试推送新ViewController的类）不是ViewController。 只有ViewControllers可以呈现其他Viewcontrollers。演示文稿的代码应该（放在ViewController中）：

if(btn1.selected) {
    UIViewController *second =[[UIViewController alloc] initWithNibName:nil bundle:nil];
    [self presentModalViewController:second animated:YES];
    [second release]
}