iOS UI基础-14.0 DatePicker

// 1.创建DatePicker
    UIDatePicker *datePicker = [[UIDatePicker alloc] init];
    // 2.设置模式
    [datePicker setDatePickerMode:UIDatePickerModeDate];
    // 3.设置locale
    [datePicker setLocale:[NSLocale localeWithLocaleIdentifier:@"zh_CN"]];
    // 4.设置textField的响应键盘为DatePicker
    [self.textField setInputView:datePicker];

// 1.创建UIToolBar
    UIToolbar *toolBar = [[UIToolbar alloc] init];
    toolBar.barTintColor = [UIColor grayColor]; // 这个才是UIToolBar的背景色
    toolBar.frame = CGRectMake(0, 0, 320, 44); // 必须设置好size，UIToolBar才能显示，否则只能显示Item，且不能点击
    // 2.创建Item
    UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithTitle:@"上一个" style:UIBarButtonItemStylePlain target:self action:@selector(previousClicked)];
   
    UIBarButtonItem *item2 = [[UIBarButtonItem alloc] initWithTitle:@"下一个" style:UIBarButtonItemStylePlain target:self action:@selector(nextClicked)];
   
    UIBarButtonItem *item3 = [[UIBarButtonItem alloc] initWithTitle:@"完成" style:UIBarButtonItemStylePlain target:self action:@selector(finishClicked)];
   
    // 间隙Item
    UIBarButtonItem *spaceItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
   
    // 3.添加Item到UIToolBar
    toolBar.items = @[item1, item2, spaceItem, item3];
   
    // 4.添加UIToolBar到键盘上方，设置为textField的辅助视图
    self.textField.inputAccessoryView = toolBar;