分类：
1.概述
UIPasteboard是ios中访问粘贴板的原生控件，可分为系统等级的和app等级的，系统等级的独立于app，可以复制一个app的内容到另一个app；app等级的只能在app内进行复制和粘贴；它们分别由+ (nullable UIPasteboard *)pasteboardWithName:(NSString *)pasteboardName create:(BOOL)create这两个类方法进行创建。
2.数据类型
可以复制在粘贴板的数据类型有NSString、UIImage、NSURL、UIColor、NSData以及由这些类型元素组成的数组。可分别由它们的set方法将数据放在粘贴板中，如NSString：
UIPasteboard* pasteboard = [UIPasteboard generalPasteboard]; [pasteboard setString:@"复制的字符串内容"];3.认识常用方法
/*通过名称获取粘贴板并且移除*/ + (void)removePasteboardWithName:(NSString *)pasteboardName; /*从粘贴板中获取数据，pasteboardType是自定义的，说明app可以处理哪种类型的数据*/ - (nullable NSData *)dataForPasteboardType:(NSString *)pasteboardType; /*data类型的数据放在粘贴板中，pasteboardType同上*/ - (void)setData:(NSData *)data forPasteboardType:(NSString *)pasteboardType; /*从粘贴板中取出data*/ - (nullable NSData *)dataForPasteboardType:(NSString *)pasteboardType;4.使用方法
在ios中，支持UIPasteboard原生控件只有UITextField 、UITextView、UIWebView这三个,如果想自定义一个控件能够使用UIPasteboard，需要在定义的时候重载-(BOOL)canBecomeFirstResponder和 -(BOOL)canPerformAction:(SEL)action withSender:(id)sender这两个方法，前者设置控件可称为第一响应器，后者决定这个控件能够使用复制、剪切、选中、全选、粘贴等的哪一种或几种功能,并重载对应的-(void)copy:(id)sender、-(void)cut:(id)sender、-(void)select:(id)sender、-(void)selectAll:(id)sender、-(void)paste:(id)sender方法，在这几个方法中处理事件,UIMenuController负责显示UI。
5.复制图片的简单例子
创建一个CopyView
#import "CopyView.h" @interface CopyView () @property (strong, nonatomic) UIImageView* img1; @property (strong, nonatomic) UIImageView* img2; @end @implementation CopyView -(UIImageView *)img1{ if (_img1 == nil) { _img1 = [[UIImageView alloc] initWithFrame:CGRectMake(10.0f, 20.0f, 100.0f, 100.0f)]; NSString* path = [[NSBundle mainBundle] pathForResource:@"NetworldImage" ofType:@"jpg"]; _img1.image = [UIImage imageWithContentsOfFile:path]; } return _img1; } -(UIImageView *)img2{ if (_img2 == nil) { _img2 = [[UIImageView alloc] initWithFrame:CGRectMake(CGRectGetMaxX(self.img1.frame)+50.0f, 20.0f, 100.0f, 100.0f)]; _img2.backgroundColor = [UIColor lightGrayColor]; } return _img2; } - (instancetype)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { self.backgroundColor = [UIColor whiteColor]; [self addSubview:self.img1]; [self addSubview:self.img2]; } return self; } -(BOOL)canBecomeFirstResponder{ return YES; } -(BOOL)canPerformAction:(SEL)action withSender:(id)sender{ NSArray* methodNameArr = @[@"copy:",@"cut:",@"select:",@"selectAll:",@"paste:"]; if ([methodNameArr containsObject:NSStringFromSelector(action)]) { return YES; } return [super canPerformAction:action withSender:sender]; } -(void)copy:(id)sender{ UIPasteboard* pasteboard = [UIPasteboard generalPasteboard]; [pasteboard setImage:self.img1.image]; } -(void)paste:(id)sender{ UIPasteboard* pasteboard = [UIPasteboard generalPasteboard]; self.img2.image = [pasteboard image]; } -(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{ [self becomeFirstResponder]; UIMenuController* menuController = [UIMenuController sharedMenuController]; [menuController setTargetRect:self.img1.frame inView:self]; [menuController setMenuVisible:YES animated:YES]; } @end在controller中
#import "ViewController.h" #import "CopyView.h" @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; CopyView* cv = [[CopyView alloc] initWithFrame:self.view.bounds]; self.view = cv; } @end
文／charlesLaw（简书作者）
原文链接：http://www.jianshu.com/p/1213f9f00fdd
原文链接：http://www.jianshu.com/p/1213f9f00fdd