UIAlertController高级之嵌入其他控件

在编码过程中,我们经常遇到需要这样一个效果,就是弹出框的嵌套;

举个最简单的例子,比如你要选择时间,必然需要一个时间选择器DatePicker.但是这个选择器又是在你点击某按钮时弹出,弹出方式最常见的就是上拉菜单了,所以这就涉及了AlertController嵌入DatePicker; 因为前一篇我已经说过了,在IOS8之后,苹果已经废弃了actionSheet;那么我们就要重新来玩这个嵌套了.

那么我拿刚才写的一个小demo来说一下

#define BUTTONSIZE 40

// datePicker创建方法
- (void)creatDatePicker
{
    self.datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0*WIDTH, 20*HEIGHT, 320*WIDTH, 216)];
    NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];
    // 设置中文显示
    self.datePicker.locale = locale;
    // 设置时区
    [self.datePicker setTimeZone:[NSTimeZone timeZoneWithName:@"GMT+0800"]];
    // 设置当前显示时间
    // 设置初始时间
    [self.datePicker setDate:[NSDate date] animated:YES];
    // 设置选择器类型
    self.datePicker.datePickerMode = UIDatePickerModeDate;
    [self.datePicker addTarget:self action:@selector(datePickerValueChanged:) forControlEvents:UIControlEventValueChanged];
}

- (void)datePickerValueChanged:(UIDatePicker*)datePicker
{

}

<pre name="code" class="objc">// 弹出上拉菜单
- (void)actionSheetShow
{
    self.alertController = [UIAlertController alertControllerWithTitle:@"\n\n\n\n\n" message:@"\n\n\n\n\n\n" preferredStyle:UIAlertControllerStyleActionSheet];
    //    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, -20, 360, 316)];
    //    imageView.image = [UIImage imageNamed:@"SlotMachineBackground@2x.png"];
    //  [alertController.view addSubview:imageView];
    UIImageView *imageView2 = [[UIImageView alloc] initWithFrame:CGRectMake(-10, -20, 385, 300)];
    imageView2.image = [UIImage imageNamed:@"pickerBack.png"];
    UIButton *sureButton = [self creatButtonWithFrame:CGRectMake(340, 5, 0.75 * BUTTONSIZE, 0.75 * BUTTONSIZE) action:@selector(dismissAlert:) image:[UIImage imageNamed:@"FBDsureImage"] title:nil];
    sureButton.tag = 1000;
    UIButton *errorButton = [self creatButtonWithFrame:CGRectMake(5, 5, 0.75 * BUTTONSIZE, 0.75 * BUTTONSIZE) action:@selector(dismissAlert:) image:[UIImage imageNamed:@"FBDerrorImage"] title:nil];
    errorButton.tag = 1001;
    [imageView2 addSubview:sureButton];
    [imageView2 addSubview:errorButton];
    imageView2.userInteractionEnabled = YES;
    [self.alertController.view addSubview:imageView2];
    [self.alertController.view addSubview:self.datePicker];
    [self presentViewController:self.alertController animated:YES completion:nil];
}

// 创建button
- (UIButton *)creatButtonWithFrame:(CGRect)frame action:(SEL)sel image:(UIImage *)image title:(NSString *)title
{
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = frame;
    [button addTarget:self action:sel forControlEvents:UIControlEventTouchUpInside];
    [button setImage:image forState:UIControlStateNormal];
    [button setTitle:title forState:UIControlStateNormal];
    button.showsTouchWhenHighlighted = YES;
    return button;
}

这样就实现了一个简单的AlertController嵌入DatePicker