iOS开发——UI基础-提示框

提示框的种类有很多，废话不多说，直接上代码

一、文本提示框

运行结果如下：

代码实现如下：

@interface ViewController ()
// 添加方法
- (IBAction)add;
// 移除方法
- (IBAction)remove;
// 商品容器
@property (weak, nonatomic) IBOutlet UIView *shopsView;

@property (weak, nonatomic) IBOutlet UIButton *removeBtn;
@property (weak, nonatomic) IBOutlet UIButton *addBtn;
@property (weak, nonatomic) IBOutlet UILabel *hudLabel;

@property (nonatomic, strong)NSMutableArray *shops;
@end

@implementation ViewController

// 控制器的view创建完毕就会调用
// 该方法只会调用一次
- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // 一开始就让提示框隐藏
    self.hudLabel.alpha = 0.0;
}

- (IBAction)add
{
/**********************计算X/Y**************************/
    // 商品的宽高
    CGFloat shopWidth = 70;
    CGFloat shopHeight = 100;
    
    // 总行数和列数
    int totalCol = 3;
    
    // 计算间隙
    CGFloat ColMargin = (self.shopsView.frame.size.width - (totalCol * shopWidth)) / (totalCol - 1);
    CGFloat RowMargin = ColMargin;
    
    
    // 获取绿色控件的子控件
    NSUInteger index = self.shopsView.subviews.count;
    
    // 1.计算行号
    int row = index / 3;
    // 2.计算当前行的Y值
    // Y = 行号 * (商品的高度 + 间隙)
    CGFloat shopY = row * (shopHeight + RowMargin);

    // 3.计算列号
    int col = index % 3;
    // 4.计算当前列的X值
    CGFloat shopX = col * (shopWidth + ColMargin);

    
/**********************创建商品**************************/

    // 1.加载XIB
    XMGShopView *shopView = [XMGShopView shopView];
    
    // 2.设置frame
    CGRect tempFrame = shopView.frame;
    tempFrame.origin.x = shopX;
    tempFrame.origin.y = shopY;
    shopView.frame = tempFrame;
    
    // 3.设置数据
    NJShop *shop = self.shops[index];
    shopView.shop = shop;
    
    // 2.添加子控件
    [self.shopsView addSubview:shopView];

/**********************添加商品**************************/

    // 6.控制删除按钮是否可以点击
    self.removeBtn.enabled = YES;
    
    // 7.控制添加按钮是否可以点击
    self.addBtn.enabled = self.shopsView.subviews.count < self.shops.count;
    
    // 8.控制提示框是否显示
    if (self.addBtn.enabled == NO) {
        [self showHUDWithText:@"商品柜已经满了, 不要再买买买了..."];
    }
}

- (IBAction)remove
{
    
    NSLog(@"%@", self.shops[0]);
    
    // 1.取出父控件中最后一个控件
    UIView *subView =  self.shopsView.subviews.lastObject;
    // 2.移除最后一个控件
    [subView removeFromSuperview];
    
    // 3.控制删除按钮是否可以点击
    self.removeBtn.enabled = self.shopsView.subviews.count > 0;
    
    // 4.控制添加按钮是否可以点击
    self.addBtn.enabled = YES;
    
    // 5.控制器提示框是否显示
    if (self.removeBtn.enabled == NO) {
        
        self.hudLabel.text = @"商品柜已经空了, 继续买买买...";
        // 显示提示框
        [UIView animateWithDuration:1.0 animations:^{
            self.hudLabel.alpha = 1.0;
        } completion:^(BOOL finished) {
            
            [UIView animateWithDuration:1.0 delay:2.0 options:kNilOptions animations:^{
                self.hudLabel.alpha = 0.0;
            } completion:nil];
        }];
         
        [self showHUDWithText:@"商品柜已经空了, 继续买买买..."];
    }
}

- (void)showHUDWithText:(NSString *)text
{
    // 1.设置需要展示的内容
    self.hudLabel.text =text;
    
    // 2.显示提示框
    [UIView animateWithDuration:1.0 animations:^{
        self.hudLabel.alpha = 1.0;
    } completion:^(BOOL finished) {
        // 3.隐藏提示框
        [UIView animateWithDuration:1.0 delay:2.0 options:kNilOptions animations:^{
            self.hudLabel.alpha = 0.0;
        } completion:nil];
    }];
}

// 重写getter方法
- (NSMutableArray *)shops
{
    if (_shops == nil) {

        // 1.获取plist文件的绝对路径
        NSString *path = [[NSBundle mainBundle] pathForResource:@"shops.plist" ofType:nil];
        // 2.根据路径加载plist文件
        NSArray *tempArr = [NSArray arrayWithContentsOfFile:path];
        
        // 3.将数组中所有的字典转换为模型
        _shops = [NSMutableArray array];
        for (NSDictionary *dict in tempArr) {
            NJShop *shop = [[NJShop alloc] init];
            shop.name = dict[@"name"];
            shop.icon = dict[@"icon"];
            [_shops addObject:shop];
        }
    }
    return _shops;
}
@end

二、系统自带的提示框（HUD）

1.UIAlertView

代码如下：

- (void)useAlert
{
    // 1.UIAlerView
    // 如果看到iOS提供的方法中有... 就代表是一个可变参数，可以传一个或者多个

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"哥是标题" message:@"姐是正文..." delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
    alert.alertViewStyle =  UIAlertViewStyleLoginAndPasswordInput;
    
    [alert show];
}
#pragma mark - UIAlertViewDelegate
// 只要UIAlertView上的按钮被点击, 就会调用
// alertView:谁触发事件就会把谁传递进来
// ButtonAtIndex: 当前被点击按钮的索引
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonInde
{
    // 取消 = 0, 确定 = 1 , 其他 = 2 , Other = 3 以此类推
    switch (buttonInde) {
        case 0:
            NSLog(@"点击了取消");
            break;
        case 1:
            NSLog(@"点击了确定");
            break;
        case 2:
            NSLog(@"点击了其他");
            break;
        case 3:
            NSLog(@"点击了Other");
            break;
        default:
            break;
    }
}

2. UIActionSheet

- (void)useActionSheet
{
    // 2.UIActionSheet
    // 1.创建UIActionSheet
    UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"哥是标题" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"确定" otherButtonTitles:@"其它", @"Other", nil];
    // 2.显示UIActionSheet
    [sheet showInView:self.view];
}

#pragma mark - UIActionSheetDelegate
// 只要UIActionSheet上的按钮被点击就会调用
// actionSheet:谁触发事件就会把谁传递进来
// clickedButtonAtIndex:当前被点击按钮的索引
- (void)actionSheet:(nonnull UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    NSLog(@"%ld", buttonIndex);
}

注意以上两中方法都要设置代理，那么分别要遵守

<UIAlertViewDelegate, UIActionSheetDelegate>协议

3. UIAlertController

- (void)useAlertControllerAlert
{
    // 1.创建alert控制器
    UIAlertController *alertVc = [UIAlertController alertControllerWithTitle:@"哥是标题" message:@"姐是正文..." preferredStyle:UIAlertControllerStyleAlert];
    
    // 2.添加一个按钮
    // Title : 按钮上显示的文字
    // style: 按钮的样式
    // handler: 点击按钮之后的回调
    UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * __nonnull action) {
        NSLog(@"点击了确定按钮");
    }];
    
    UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * __nonnull action) {
        NSLog(@"点击了取消按钮");
    }];
    
    [alertVc addAction:action1];
    [alertVc addAction:action2];
    
    // 3.添加三个输入框
    [alertVc addTextFieldWithConfigurationHandler:^(UITextField * __nonnull textField) {
        textField.text = @"用户名";
        NSLog(@"textField");
    }];
    [alertVc addTextFieldWithConfigurationHandler:^(UITextField * __nonnull textField) {
        textField.secureTextEntry = YES;
        NSLog(@"textField");
    }];
    [alertVc addTextFieldWithConfigurationHandler:^(UITextField * __nonnull textField) {
        NSLog(@"textField");
    }];
    
    // 4.presentViewController弹出一个控制器
    [self presentViewController:alertVc animated:YES completion:nil];

}

三、自定义提示框

实现代码如下：

- (void)useCustomHUD
{
    // 1.创建父控件
    UIView *cover = [[UIView alloc] init];
    cover.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.5];
    cover.frame = CGRectMake(0, 0, 150, 150);
    cover.center = self.view.center;
    
    // 修改父控件为圆角
    cover.layer.cornerRadius = 10;
    [self.view addSubview:cover];
    
    // 2.创建菊花
    // 菊花有默认的尺寸
    // 注意: 虽然有默认的尺寸, 但是要想显示必须让菊花转起来
    UIActivityIndicatorView *activity = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    activity.center = CGPointMake(cover.frame.size.width * 0.5, 50);
    [activity startAnimating];
    
    [cover addSubview:activity];
    // 3.创建UILabel
    UILabel *label = [[UILabel alloc] init];
    //    label.backgroundColor = [UIColor purpleColor];
    label.textAlignment = NSTextAlignmentCenter;
    label.text = @"正在拼命加载中...";
    label.frame = CGRectMake(0, cover.frame.size.height - 80, cover.frame.size.width, 80);
    [cover addSubview:label];
    
}

除了以上列出的几种方法外，还可以使用第三方框架，比如MBP