objective-c - 如何删除 Objective-C 中的 subview ？

Question

我已通过编程方式将 UIButton 和 UITextView 作为 subview 添加到我的 View 中。

notesDescriptionView = [[UIView alloc]initWithFrame:CGRectMake(0,0,320,460)];
notesDescriptionView.backgroundColor = [UIColor redColor];
[self.view addSubview:notesDescriptionView];

textView = [[UITextView alloc] initWithFrame:CGRectMake(0,0,320,420)]; 
[self.view addSubview:textView]; 
printf("\n description  button \n");

button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button
  addTarget:self action:@selector(cancel:)
  forControlEvents:UIControlEventTouchDown];
[button setTitle:@"OK" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 420.0, 160.0, 40.0);
[self.view addSubview:button];

我需要在单击按钮时删除所有 subview 。

我试过:

[self.view removeFromSuperView]

但它不起作用。

Answer 1

移除你添加到 View 的所有 subview

使用下面的代码

for (UIView *view in [self.view subviews]) 
{
    [view removeFromSuperview];
}