IOS开发UIPasteboard类的粘贴板全面详解

let string = "Hello, World!"  
let pasteboard = UIPasteboard.general
pasteboard.setString(string, forType: .text)  
print("剪贴板中的内容是:\(string)")
if let string = pasteboard.string {  
    print("剪贴板中的内容是:\(string)")  
}

//获取系统级别的剪切板
+ (UIPasteboard *)generalPasteboard;
//获取一个自定义的剪切板 name参数为此剪切板的名称 create参数用于设置当这个剪切板不存在时 是否进行创建
+ (nullable UIPasteboard *)pasteboardWithName:(NSString *)pasteboardName create:(BOOL)create;
//获取一个应用内可用的剪切板
+ (UIPasteboard *)pasteboardWithUniqueName;

//剪切板的名称
@property(readonly,nonatomic) NSString *name;
//根据名称删除一个剪切板
+ (void)removePasteboardWithName:(NSString *)pasteboardName;
//是否进行持久化
@property(getter=isPersistent,nonatomic) BOOL persistent;
//此剪切板的改变次数 系统级别的剪切板只有当设备重新启动时 这个值才会清零
@property(readonly,nonatomic) NSInteger changeCount;

//获取剪切板中最新数据的类型
- (NSArray<NSString *> *)pasteboardTypes;
//获取剪切板中最新数据对象是否包含某一类型的数据
- (BOOL)containsPasteboardTypes:(NSArray<NSString *> *)pasteboardTypes;
//将剪切板中最新数据对象某一类型的数据取出
- (nullable NSData *)dataForPasteboardType:(NSString *)pasteboardType;
//将剪切板中最新数据对象某一类型的值取出
- (nullable id)valueForPasteboardType:(NSString *)pasteboardType;
//为剪切板中最新数据对应的某一数据类型设置值
- (void)setValue:(id)value forPasteboardType:(NSString *)pasteboardType;
//为剪切板中最新数据对应的某一数据类型设置数据
- (void)setData:(NSData *)data forPasteboardType:(NSString *)pasteboardType;

//数据组数
@property(readonly,nonatomic) NSInteger numberOfItems;
//获取一组数据对象包含的数据类型
- (nullable NSArray *)pasteboardTypesForItemSet:(nullable NSIndexSet*)itemSet;
//获取一组数据对象中是否包含某些数据类型
- (BOOL)containsPasteboardTypes:(NSArray<NSString *> *)pasteboardTypes inItemSet:(nullable NSIndexSet *)itemSet;
//根据数据类型获取一组数据对象
- (nullable NSIndexSet *)itemSetWithPasteboardTypes:(NSArray *)pasteboardTypes;
//根据数据类型获取一组数据的值
- (nullable NSArray *)valuesForPasteboardType:(NSString *)pasteboardType inItemSet:(nullable NSIndexSet *)itemSet;
//根据数据类型获取一组数据的NSData数据
- (nullable NSArray *)dataForPasteboardType:(NSString *)pasteboardType inItemSet:(nullable NSIndexSet *)itemSet;
//所有数据对象
@property(nonatomic,copy) NSArray *items;
//添加一组数据对象
- (void)addItems:(NSArray<NSDictionary<NSString *, id> *> *)items;

//所有字符串类型数据的类型定义字符串数组
UIKIT_EXTERN NSArray<NSString *> *UIPasteboardTypeListString;
//所有URL类型数据的类型定义字符串数组
UIKIT_EXTERN NSArray<NSString *> *UIPasteboardTypeListURL;
//所有图片数据的类型定义字符串数据
UIKIT_EXTERN NSArray<NSString *> *UIPasteboardTypeListImage;
//所有颜色数据的类型定义字符串数组
UIKIT_EXTERN NSArray<NSString *> *UIPasteboardTypeListColor;

//获取或设置剪切板中的字符串数据
@property(nullable,nonatomic,copy) NSString *string;
//获取或设置剪切板中的字符串数组
@property(nullable,nonatomic,copy) NSArray<NSString *> *strings;
//获取或设置剪切板中的URL数据
@property(nullable,nonatomic,copy) NSURL *URL;
//获取或设置剪切板中的URL数组
@property(nullable,nonatomic,copy) NSArray<NSURL *> *URLs;
//获取或s何止剪切板中的图片数据
@property(nullable,nonatomic,copy) UIImage *image;
//获取或设置剪切板中的图片数组
@property(nullable,nonatomic,copy) NSArray<UIImage *> *images;
//获取或设置剪切板中的颜色数据
@property(nullable,nonatomic,copy) UIColor *color;
//获取或设置剪切板中的颜色数组
@property(nullable,nonatomic,copy) NSArray<UIColor *> *colors;
//部分代码参考
- (BOOL)canBecomeFirstResponder {
    return YES;
}
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
        //action 会返回很多，想用哪个就写那个（action == @selector(cut:) ）
    return (action == @selector(copy:) || action == @selector(paste:) );
}
-(void)copy:(id)sender{
    UIPasteboard* pasteboard = [UIPasteboard generalPasteboard];
    [pasteboard setImage:self.image];
    if ([self.delegate respondsToSelector:@selector(transSomeTing:)]) {
        [self.delegate transSomeTing:pasteboard.image];
        NSLog(@"%@",self.image);
    }
    NSLog(@"您点击的是拷贝%@",pasteboard.items);
}
-(void)paste:(id)sender{
    UIPasteboard* pasteboard = [UIPasteboard generalPasteboard];
    UIImage *image = [pasteboard image];
    if (image) {
        self.image = image;
    }
    NSLog(@"您点击的是粘贴");
}
- (void)cut:(id)sender {
    UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
    [pasteboard setImage:self.image];
    NSLog(@"您点击的是剪切");
}
- (void)select:(id)sender {
    NSLog(@"您点击的是选择");
}
-(void)selectAll:(id)sender {
    NSLog(@"您点击的是全选");
}

//剪切板内容发生变化时发送的通知
UIKIT_EXTERN NSString *const UIPasteboardChangedNotification;
//剪切板数据类型键值增加时发送的通知
UIKIT_EXTERN NSString *const UIPasteboardChangedTypesAddedKey;
//剪切板数据类型键值移除时发送的通知
UIKIT_EXTERN NSString *const UIPasteboardChangedTypesRemovedKey;
//剪切板被删除时发送的通知
UIKIT_EXTERN NSString *const UIPasteboardRemovedNotification;
//使用举例
//当剪切板被删除时，监听通知，可处理相应事件；
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(menuControllerWillHide) name:UIPasteboardRemovedNotification object:nil];

//  ViewController.m
//  Practice_UIPasteboard
//
//
#import "ViewController.h"
#import "PasteboardLabel.h"
#import "PasteboardImageView.h"
#import <MobileCoreServices/MobileCoreServices.h>
@interface ViewController ()<transSometing>
@property (strong, nonatomic) IBOutlet PasteboardImageView *leftImageView;
@end
@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    self.leftLabel.userInteractionEnabled = YES;
//用于监听 UIMenuController的变化
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(menuControllerWillShow) name:UIMenuControllerWillShowMenuNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(menuControllerWillHide) name:UIMenuControllerWillHideMenuNotification object:nil];
    // Do any additional setup after loading the view, typically from a nib.
}
- (IBAction)longPressGestureAction:(UILongPressGestureRecognizer *)sender {
//要将图片变为第一响应者，而且要把图片设为**可交换状态**
        [self.leftImageView becomeFirstResponder];
        self.leftImageView.userInteractionEnabled = YES;
        self.leftImageView.delegate = self;
        UIMenuController *menuController = [UIMenuController sharedMenuController];
        [menuController setTargetRect:self.leftImageView.frame inView:self.view];
        [menuController setMenuVisible:YES animated:YES];
    }
}

//  PasteboardImageView.m
//  Practice_UIPasteboard
#import "PasteboardImageView.h"
@implementation PasteboardImageView
//这个方法不能少
- (BOOL)canBecomeFirstResponder {
    return YES;
}
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
    return (action == @selector(copy:) || action == @selector(paste:) );
}
-(void)copy:(id)sender{
    UIPasteboard* pasteboard = [UIPasteboard generalPasteboard];
    [pasteboard setImage:self.image];
    if ([self.delegate respondsToSelector:@selector(transSomeTing:)]) {
        [self.delegate transSomeTing:pasteboard.image];
        NSLog(@"%@",self.image);
    }
    NSLog(@"您点击的是拷贝%@",pasteboard.items);
}
-(void)paste:(id)sender{
    UIPasteboard* pasteboard = [UIPasteboard generalPasteboard];
    UIImage *image = [pasteboard image];
    if (image) {
        self.image = image;
    }
    NSLog(@"您点击的是粘贴");
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/
@end