1、简介
用于剪切、复制、粘贴、选择、选择ALL和DELETE命令的菜单界面。
UITextField、UIWebView、UITextView自带有这种UIMenuController效果;
2、相关API
#import <Foundation/Foundation.h>
#import <CoreGraphics/CoreGraphics.h>
#import <UIKit/UIKitDefines.h>
NS_ASSUME_NONNULL_BEGIN
typedef NS_ENUM(NSInteger, UIMenuControllerArrowDirection) {
UIMenuControllerArrowDefault, // up or down based on screen location
UIMenuControllerArrowUp NS_ENUM_AVAILABLE_IOS(3_2),
UIMenuControllerArrowDown NS_ENUM_AVAILABLE_IOS(3_2),
UIMenuControllerArrowLeft NS_ENUM_AVAILABLE_IOS(3_2),
UIMenuControllerArrowRight NS_ENUM_AVAILABLE_IOS(3_2),
} __TVOS_PROHIBITED;
@class UIView, UIMenuItem;
NS_CLASS_AVAILABLE_IOS(3_0) __TVOS_PROHIBITED @interface UIMenuController : NSObject
//初始化懒加载
#if UIKIT_DEFINE_AS_PROPERTIES
@property(class, nonatomic, readonly) UIMenuController *sharedMenuController;
#else
+ (UIMenuController *)sharedMenuController;
#endif
//菜单的显示和隐藏
@property(nonatomic,getter=isMenuVisible) BOOL menuVisible; // default is NO
- (void)setMenuVisible:(BOOL)menuVisible animated:(BOOL)animated; //可动画
//设置显示区域
- (void)setTargetRect:(CGRect)targetRect inView:(UIView *)targetView;
//编辑菜单箭头指向的方向。
@property(nonatomic) UIMenuControllerArrowDirection arrowDirection NS_AVAILABLE_IOS(3_2); // default is UIMenuControllerArrowDefault
@property(nullable, nonatomic,copy) NSArray<UIMenuItem *> *menuItems NS_AVAILABLE_IOS(3_2); // default is nil. 编辑菜单中的自定义菜单项。
//刷新Menu
- (void)update;
//返回编辑菜单的框架
@property(nonatomic,readonly) CGRect menuFrame;
@end
UIKIT_EXTERN NSNotificationName const UIMenuControllerWillShowMenuNotification __TVOS_PROHIBITED; //将要显示
UIKIT_EXTERN NSNotificationName const UIMenuControllerDidShowMenuNotification __TVOS_PROHIBITED; //已经显示
UIKIT_EXTERN NSNotificationName const UIMenuControllerWillHideMenuNotification __TVOS_PROHIBITED; //将要隐藏
UIKIT_EXTERN NSNotificationName const UIMenuControllerDidHideMenuNotification __TVOS_PROHIBITED; //已经隐藏
UIKIT_EXTERN NSNotificationName const UIMenuControllerMenuFrameDidChangeNotification __TVOS_PROHIBITED; //视图更新
//自定义菜单项
NS_CLASS_AVAILABLE_IOS(3_2) __TVOS_PROHIBITED @interface UIMenuItem : NSObject
//标题 和 响应方法
- (instancetype)initWithTitle:(NSString *)title action:(SEL)action NS_DESIGNATED_INITIALIZER;
@property(nonatomic,copy) NSString *title;
@property(nonatomic) SEL action;
@end
3、自定义MenuLabel
#import "MenuLabel.h"
@implementation MenuLabel
- (instancetype)initWithFrame:(CGRect)frame{
if (self = [super initWithFrame:frame]) {
[self setUI];
}
return self;
}
- (void)awakeFromNib{
[super awakeFromNib];
[self setUI];
}
- (void)setUI{
self.userInteractionEnabled = YES;
// self.text = @"";
[self addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGes:)]];
}
- (void)tapGes:(UITapGestureRecognizer *)ges{
[self becomeFirstResponder];
UIMenuController *menu = [UIMenuController sharedMenuController];
menu.menuItems = @[[[UIMenuItem alloc] initWithTitle:@"点赞" action:@selector(tap:)],
[[UIMenuItem alloc] initWithTitle:@"留言" action:@selector(reply:)],
[[UIMenuItem alloc] initWithTitle:@"踩一踩" action:@selector(down:)],
[[UIMenuItem alloc] initWithTitle:@"踩一踩" action:@selector(down:)]];
[menu setTargetRect:self.bounds inView:self];
[menu setMenuVisible:YES animated:YES];
}
- (BOOL)canBecomeFirstResponder{
return YES;
}
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender{
if ( (action == @selector(copy:) && self.text) // 需要有文字才能支持复制
|| (action == @selector(cut:) && self.text) // 需要有文字才能支持剪切
|| action == @selector(paste:)
|| action == @selector(tap:)
|| action == @selector(reply:)
|| action == @selector(down:)) return YES;
return NO;
}
- (void)cut:(UIMenuController *)menu
{
//UIPasteboard 粘贴板
// 将label的文字存储到粘贴板
[UIPasteboard generalPasteboard].string = self.text;
// 清空文字
self.text = nil;
NSLog(@"cut");
}
- (void)copy:(UIMenuController *)menu
{
// 将label的文字存储到粘贴板
[UIPasteboard generalPasteboard].string = self.text;
NSLog(@"copy");
}
- (void)paste:(UIMenuController *)menu
{
// 将粘贴板的文字赋值给label
self.text = [UIPasteboard generalPasteboard].string;
NSLog(@"paste");
}
- (void)tap:(UIMenuController *)menu{
NSLog(@"tap");
}
- (void)reply:(UIMenuController *)menu{
NSLog(@"reply");
}
- (void)down:(UIMenuController *)menu{
NSLog(@"down");
}
@end
注意事项：自身可交互、成为第一响应者、显示前设置好位置等属性；
self.userInteractionEnabled = YES;
[self becomeFirstResponder];
实现UIResponder类中的一个方法：
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender；
Demo地址：https://github.com/jayZhangh/PhotosFrameworkBasicUsage.git
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