xcode 单击按钮时，如何将 UIView 添加为 UIViewController 的子视图？
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How can I add a UIView as a subview of UIViewController when a button clicked?
提问by iphoneStruggler
In my app I need to add a UIView dynamically whenever user taps on a button in my main UIViewController. How can I do this?
在我的应用程序中，每当用户点击主 UIViewController 中的按钮时，我都需要动态添加 UIView。我怎样才能做到这一点？
回答by Bj?rn Marschollek
Create a new method in your view controller with this signature: -(IBAction) buttonTapped:(id)sender. Save your file. Go to Interface Builder and connect your button to this method (control-click and drag from your button to the view controller [probably your File's owner] and select the -buttonTappedmethod).
Then implement the method:
在与此签名您的视图控制器创建一个新的方法：-(IBAction) buttonTapped:(id)sender。保存您的文件。转到 Interface Builder 并将您的按钮连接到此方法（按住 Control 单击并从您的按钮拖动到视图控制器 [可能是您的文件所有者] 并选择该-buttonTapped方法）。然后实现方法：
-(IBAction) buttonTapped:(id)sender {
// create a new UIView
UIView *newView = [[UIView alloc] initWithFrame:CGRectMake(10,10,100,100)];
// do something, e.g. set the background color to red
newView.backgroundColor = [UIColor redColor];
// add the new view as a subview to an existing one (e.g. self.view)
[self.view addSubview:newView];
// release the newView as -addSubview: will retain it
[newView release];
}
