UIActionSheet

OS中UIActionSheet使用方法详解

是个弹出按钮

一、初始化方法

• (instancetype)initWithTitle:(NSString *)title delegate:(id)delegate cancelButtonTitle:(NSString *)cancelButtonTitle destructiveButtonTitle:(NSString *)destructiveButtonTitle otherButtonTitles:(NSString *)otherButtonTitles, ...;

// 方法1 无代理，只有2个确定按钮
UIActionSheet *actionsheet01 = [[UIActionSheet alloc] initWithTitle:@"按钮点击后我才出现的。" delegate:nil cancelButtonTitle:@"取消" destructiveButtonTitle:@"确定" otherButtonTitles:@"知道了", nil];
// 显示
[actionsheet01 showInView:self.view];

// 方法2 无代理，有多个确定按钮
UIActionSheet *actionsheet02 = [[UIActionSheet alloc] initWithTitle:@"按钮点击后我才出现的。" delegate:nil cancelButtonTitle:@"取消" destructiveButtonTitle:@"确定" otherButtonTitles:@"知道了0", @"知道了1", @"知道了2", @"知道了3", nil];
// 显示
[actionsheet02 showInView:self.view];

---

// 方法3 有代理，有2个确定按钮
/*
1 设置代理为 self
2 添加协议
3 实现方法
*/
UIActionSheet *actionsheet03 = [[UIActionSheet alloc] initWithTitle:@"选择图片" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"相册", @"拍照", nil];
// 显示
[actionsheet03 showInView:self.view];

// 添加协议
@interface ViewController () <UIActionSheetDelegate>

@end

// UIActionSheetDelegate实现代理方法

• (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
  {
  NSLog(@"buttonIndex=%ld", buttonIndex);

  // 方法1
  // if (0 == buttonIndex)
  // {
  // NSLog(@"点击了相册按钮");
  // }
  // else if (1 == buttonIndex)
  // {
  // NSLog(@"点击了拍照按钮");
  // }
  // else if (2 == buttonIndex)
  // {
  // NSLog(@"点击了取消按钮");
  // }

---

参数说明：

title：视图标题

delegate：设置代理

cancelButtonTitle：取消按钮的标题

destructiveButtonTitle：特殊标记的按钮的标题

otherButtonTitles：其他按钮的标题
二、常用方法和属性介绍

@property(nonatomic,copy) NSString *title;

设置标题

@property(nonatomic) UIActionSheetStyle actionSheetStyle;

设置风格，枚举如下：

typedef NS_ENUM(NSInteger, UIActionSheetStyle) {

UIActionSheetStyleAutomatic = -1,

UIActionSheetStyleDefault = UIBarStyleDefault,

UIActionSheetStyleBlackTranslucent = UIBarStyleBlackTranslucent,

UIActionSheetStyleBlackOpaque = UIBarStyleBlackOpaque,

};

• (NSInteger)addButtonWithTitle:(NSString *)title;

添加一个按钮，会返回按钮的索引

• (NSString *)buttonTitleAtIndex:(NSInteger)buttonIndex;

获取按钮标题

@property(nonatomic,readonly) NSInteger numberOfButtons;

获取按钮数量

@property(nonatomic) NSInteger cancelButtonIndex;

设置取消按钮的索引值

@property(nonatomic) NSInteger destructiveButtonIndex;

设置特殊标记

@property(nonatomic,readonly,getter=isVisible) BOOL visible;

视图当前是否可见

下面是几种弹出方式，会根据风格不同展现不同的方式

• (void)showFromToolbar:(UIToolbar *)view;

• (void)showFromTabBar:(UITabBar *)view;

• (void)showFromBarButtonItem:(UIBarButtonItem *)item animated:(BOOL)animated ;

• (void)showFromRect:(CGRect)rect inView:(UIView *)view animated:(BOOL)animated ;

• (void)showInView:(UIView *)view;

• (void)dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated;

使用代码将视图收回
三、UIActionSheet代理方法

• (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex;

点击按钮时触发的方法

• (void)willPresentActionSheet:(UIActionSheet *)actionSheet;

视图将要弹出时触发的方法

• (void)didPresentActionSheet:(UIActionSheet *)actionSheet;

视图已经弹出式触发的方法

• (void)actionSheet:(UIActionSheet *)actionSheet willDismissWithButtonIndex:(NSInteger)buttonIndex;

点击按钮后，视图将要收回时触发的方法

• (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex;

点击按钮后，视图已经收回时触发的方法