1.自定义Label的UIMenuController
#import "ZZYMenuLabel.h"
@implementation ZZYMenuLabel
/**
* xib创建label时调用
*/
- (void)awakeFromNib
{
[self setUp];
}
/**
* 代码创建label时调用
*/
- (instancetype)initWithFrame:(CGRect)frame
{
if (self = [super initWithFrame:frame]) {
[self setUp];
}
return self;
}
- (void)setUp
{
self.userInteractionEnabled = YES;
[self addGestureRecognizer:[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress)]];
}
- (void)longPress
{
NSLog(@"%s",__func__);
//1.设置label为第一响应者
//通过设置第一响应者UIMenuController可以获得支持哪些操作的信息,操作怎么处理
[self becomeFirstResponder];
//2.设置UIMenuController
UIMenuController * menu = [UIMenuController sharedMenuController];
//当长按label的时候，这个方法会不断调用，menu就会出现一闪一闪不断显示，需要在此处进行判断
if (menu.isMenuVisible)return;
//自定义 UIMenuController
UIMenuItem * item1 = [[UIMenuItem alloc]initWithTitle:@"剪切" action:@selector(myCut:)];
UIMenuItem * item2 = [[UIMenuItem alloc]initWithTitle:@"粘贴" action:@selector(myPaste:)];
menu.menuItems = @[item1,item2];
[menu setTargetRect:self.bounds inView:self];
// [menu setTargetRect:self.frame inView:self.superview];
[menu setMenuVisible:YES animated:YES];
}
#pragma mark - 对控件权限进行设置
/**
* 设置label可以成为第一响应者
*
* @注意：不是每个控件都有资格成为第一响应者
*/
- (BOOL)canBecomeFirstResponder
{
return YES;
}
/**
* 设置label能够执行那些具体操作
*
* @param action 具体操作
*
* @return YES:支持该操作
*/
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
// NSLog(@"%@",NSStringFromSelector(action));
if(action == @selector(cut:) || action == @selector(copy:) || action == @selector(myCut:)|| action == @selector(myPaste:)) return YES;
return NO;
}
#pragma mark - 方法的实现
//- (void)cut:(id)sender
//{
//
// NSLog(@"%@",sender);
//
//}
- (void)myCut:(UIMenuController *) menu
{
NSLog(@"%s---%@",__func__,menu);
//复制文字到剪切板
[self copy:menu];
//清空文字
self.text = nil;
}
- (void)cut:(UIMenuController *)menu
{
//复制文字到剪切板
[self copy:menu];
//清空文字
self.text = nil;
}
- (void)copy:(UIMenuController *)menu
{
//当没有文字的时候调用这个方法会崩溃
if (!self.text) return;
//复制文字到剪切板
UIPasteboard * paste = [UIPasteboard generalPasteboard];
paste.string = self.text;
}
- (void)myPaste:(UIMenuController *)menu
{
//将剪切板文字赋值给label
UIPasteboard * paste = [UIPasteboard generalPasteboard];
self.text = paste.string;
}
@end
2.UITableViewCell的使用
#import "ZZYTableViewCell.h"
@implementation ZZYTableViewCell
- (BOOL)canBecomeFirstResponder
{
return YES;
}
@end
#import "ZZYTableViewController.h"
#import "ZZYTableViewCell.h"
@interface ZZYTableViewController ()
@property (nonatomic, weak) ZZYTableViewCell * selectCell;
@end
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//当menucontroller显示，点击不同的cell时为什么会显示。
// menuController的显示依赖于第一响应者，当点击另外的cell时，当前cell取消第一响应者状态，menucontroller自动消失
UIMenuController * menu = [UIMenuController sharedMenuController];
NSLog(@"%d",menu.isMenuVisible);
//防止点击多次创建
if (menu.isMenuVisible)
{
[menu setMenuVisible:NO animated:YES];
}
else
{
ZZYTableViewCell * cell = [tableView cellForRowAtIndexPath:indexPath];
self.selectCell = cell;
[cell becomeFirstResponder];
UIMenuItem * item0 = [[UIMenuItem alloc]initWithTitle:@"分享" action:@selector(share:)];
UIMenuItem * item1 = [[UIMenuItem alloc]initWithTitle:@"评论" action:@selector(comment:)];
UIMenuItem * item2 = [[UIMenuItem alloc]initWithTitle:@"点赞" action:@selector(praise:)];
menu.menuItems = @[item0,item1,item2];
[menu setTargetRect:CGRectMake(0, cell.frame.size.height * 0.5, cell.frame.size.width, cell.frame.size.height) inView:cell];
[menu setMenuVisible:YES animated:YES];
}
}
- (void)share:(UIMenuController *)menu
{
NSLog(@"%@",self.selectCell.textLabel.text);
}
- (void)comment:(UIMenuController *)menu
{
}
- (void)praise:(UIMenuController *)menu
{
}
//防止拖动tableView时产生的BUG
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
UIMenuController * menu = [UIMenuController sharedMenuController];
[menu setMenuVisible:NO animated:YES];
}
3.设置位置
/**
* 设置menu显示的位置信息
*
* @param targetRect menu需要显示的矩形区域
* @param targetView targetRect会以targetView的左上角为坐标原点进行显示
*/
- (void)setTargetRect:(CGRect)targetRect inView:(UIView *)targetView;
