Question

我正在设置UIView的子类来滚动我自己的UIAlertView样式视图。我已经通过显示视图正确设置了所有内容，但我对如何正确解除视图感到有点失落。具体地，当用户点击视图中的按钮时，它需要在主视图之外进行动画制作。这是视图本身的代码：

+ (void)showCustomAlertWithTitle:(NSString *)titleString andMessage:(NSString *)messageString inView:(UIView *)view andButton1Title: (NSString *)button1Title andButton2Title: (NSString *)button2Title
{
UIWindow *window = [[[UIApplication sharedApplication] windows] lastObject];

CGRect windowFrame = window.frame;

[view setAlpha:0.5f];

UIColor *buttonColor = [UIColor colorWithRed:0/255.0f green:130/255.0f blue:216/255.0f alpha:1];
UIColor *titleColor = [UIColor colorWithRed:0/255.0f green:153/255.0f blue:102/255.0f alpha:1];

// Shade
UILabel *shadeWindow = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, windowFrame.size.width, windowFrame.size.height)];
shadeWindow.backgroundColor = [UIColor blackColor];
shadeWindow.alpha = 0.50f;

// Define size and origin of alert box
float alertBoxHeight = 225;
float alertBoxWidth = 200;
float alertBoxXorigin = windowFrame.size.width / 2 - (alertBoxWidth / 2);
float alertBoxYorigin = windowFrame.size.height / 2 - (alertBoxHeight / 2);

// Initialize background
UIView *alertBackground = [[UIView alloc] initWithFrame:CGRectMake(alertBoxXorigin, alertBoxYorigin, alertBoxWidth, alertBoxHeight)];
alertBackground.layer.cornerRadius = 5.0f;
[alertBackground.layer setMasksToBounds:YES];
alertBackground.layer.backgroundColor = [UIColor whiteColor].CGColor;

// Title Label
UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, alertBoxWidth, 40)];
titleLabel.text = titleString;
titleLabel.textAlignment = NSTextAlignmentCenter;
titleLabel.textColor = titleColor;
titleLabel.layer.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.05f].CGColor;
[titleLabel setFont:[UIFont fontWithName:@"AvenirNext-Bold" size:20.0]];

// Title Divider
UILabel *titleDivider = [[UILabel alloc] initWithFrame:CGRectMake(0, 40, alertBoxWidth, 1.0)];
titleDivider.backgroundColor = [UIColor grayColor];
titleDivider.alpha = 0.5f;

// Alert Message Text
UITextView *alertMessage = [[UITextView alloc] initWithFrame:CGRectMake(0, 40, alertBoxWidth, alertBoxHeight - 90)];
alertMessage.text = messageString;
alertMessage.layer.backgroundColor = [UIColor whiteColor].CGColor;
[alertMessage setFont:[UIFont fontWithName:@"Avenir" size:15.0]];
alertMessage.textAlignment = NSTextAlignmentCenter;
alertMessage.textColor = [UIColor grayColor];
[alertMessage setEditable:NO];

// Button 1
UIButton *button1 = [[UIButton alloc] init];
UIButton *button2 = [[UIButton alloc] init];

[button1 addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];

if (button2Title == nil)
{
    button1.frame = CGRectMake(10, alertBoxHeight - 50, alertBoxWidth - 20, 40);
}
else
{
    button1.frame = CGRectMake(10, alertBoxHeight - 50, (alertBoxWidth / 2) - 20, 40);
    button2.frame = CGRectMake(alertBoxWidth / 2 + 10, alertBoxHeight - 50, (alertBoxWidth / 2) - 20, 40);
}

button1.layer.backgroundColor = buttonColor.CGColor;
[button1 setTitle:button1Title forState:UIControlStateNormal];
[button1.titleLabel setFont:[UIFont fontWithName:@"AvenirNext-Bold" size:15.0f]];
button1.layer.cornerRadius = 2.5f;
[button1.layer setMasksToBounds:YES];

// Button 2
button2.layer.backgroundColor = buttonColor.CGColor;
[button2 setTitle:button2Title forState:UIControlStateNormal];
[button2.titleLabel setFont:[UIFont fontWithName:@"AvenirNext-Bold" size:15.0f]];
button2.layer.cornerRadius = 2.5f;
[button2.layer setMasksToBounds:YES];

// Bounce Implementation
alertBackground.transform = CGAffineTransformMakeScale(0.01, 0.01);
[UIView animateWithDuration:0.25 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^
 {
     alertBackground.transform = CGAffineTransformIdentity;
 }
                 completion:^(BOOL finished)
 {
     // do something once the animation finishes, put it here
 }];

[window addSubview:view];
[window addSubview:alertBackground];

[view addSubview:shadeWindow];
[view bringSubviewToFront:alertBackground];

[alertBackground addSubview:button1];
[alertBackground addSubview:titleLabel];
[alertBackground addSubview:titleDivider];
[alertBackground addSubview:alertMessage];
[alertBackground addSubview:button2];
[alertBackground bringSubviewToFront:titleDivider];

 /*   [[[customAlerts sharedInstance] subViewArray] addObject:alertBackground];
[[[customAlerts sharedInstance] subViewArray] addObject:view];
[[[customAlerts sharedInstance] subViewArray] addObject:window];*/
}

例如，当点击button1时，我需要让它为superView中的视图设置动画并将其从堆栈中删除。我不知道如何处理这个问题。有没有人有任何想法？

Answer 1

要永久删除视图，我通常使用UIView实例方法removeFromSuperview。然后是一行将相关变量设置为nil：

[myAlertView removeFromSuperview];
myAlertView = nil;

在您的情况下，我认为您需要通过设置其bounds属性的动画来移动屏幕，然后使用上面几行来删除对它的任何引用。

Answer 2

刚刚找到答案：

Dismiss view controller from @selector without creating seperate method

必须下载一些自定义类但它有效：

    [button1 addEventHandler:^(id sender, UIEvent *event)
{
    [UIView animateWithDuration:0.25f animations:^{
        [alertBackground setAlpha:0.0f];
        [shadeWindow setAlpha:0.0f];
        [window setAlpha:0.0f];
    }];
} forControlEvent:UIControlEventTouchUpInside];

可在此处找到自定义类：

https://github.com/ZeR0-Wu/JTTargetActionBlock

关闭自定义警报视图iOS

2 个答案: