我想制作一个UIAlertView
,其中有一个UITextField
和UITextView
显示5-6行。我尝试创建视图并将其添加为子视图,但它与警报视图的按钮重叠。调整警报视图的大小时,按钮不会向下移动。另外,我需要为此设置不同的背景和内容。那就是我需要创建一个自定义警报视图。我是iPhone编程的新手。请提供一种方法。
最佳答案
您确实无法创建自定义警报视图,因为Apple决定这是他们不希望我们遇到的问题。如果您只能使用警报中的一个文本字段和库存背景颜色,则可以使用setAlertViewStyle:UIAlertViewStylePlainTextInput
将文本字段放入警报中。
UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"Title" message:@"Message" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil, nil];
[myAlertView setAlertViewStyle:UIAlertViewStylePlainTextInput];
[myAlertView show];
但是,如果您确实要进行这些更改,则必须使用
UIView
进行自己的更改并进行修饰,使其看起来像是警报视图。这是一个粗糙的例子:- (IBAction)customAlert:(UIButton *)sender
{
UIView *myCustomView = [[UIView alloc] initWithFrame:CGRectMake(20, 100, 280, 300)];
[myCustomView setBackgroundColor:[UIColor colorWithRed:0.9f green:0.0f blue:0.0f alpha:0.8f]];
[myCustomView setAlpha:0.0f];
UIButton *dismissButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[dismissButton addTarget:self action:@selector(dismissCustomView:) forControlEvents:UIControlEventTouchUpInside];
[dismissButton setTitle:@"Close" forState:UIControlStateNormal];
[dismissButton setFrame:CGRectMake(20, 250, 240, 40)];
[myCustomView addSubview:dismissButton];
UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(20, 20, 240, 35)];
[textField setBorderStyle:UITextBorderStyleRoundedRect];
[myCustomView addSubview:textField];
UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(20, 75, 240, 150)];
[myCustomView addSubview:textView];
[self.view addSubview:myCustomView];
[UIView animateWithDuration:0.2f animations:^{
[myCustomView setAlpha:1.0f];
}];
}
- (void)dismissCustomView:(UIButton *)sender
{
[UIView animateWithDuration:0.2f animations:^{
[sender.superview setAlpha:0.0f];
}completion:^(BOOL done){
[sender.superview removeFromSuperview];
}];
}