iOS中UIMenuController的使用

不知你有没有发现，在你的微信朋友中，长按一段文字（正文或者评论），会弹出这样子的玩意：

要想在你的view或者viewController中实现长按弹出菜单栏你必须要调用becomeFirstResponder方法，其次要实现canBecomeFirstResponder方法，并返回YES.

#import "ViewController.h"

@interface ViewController ()

@property(nonatomic,strong)UILabel *label;

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

_label = [[UILabel alloc]initWithFrame:CGRectMake(60, 100, 200, 50)];

_label.text = @"我是一个label";

_label.textAlignment = NSTextAlignmentCenter;

_label.textColor = [UIColor blackColor];

[self.view addSubview:_label];

self.view.backgroundColor = [UIColor groupTableViewBackgroundColor];

//

_label.userInteractionEnabled = YES;

//添加长按手势

[_label addGestureRecognizer:[[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)]];

}

-(void)longPress:(UILongPressGestureRecognizer *)sender{

if (sender.state == UIGestureRecognizerStateBegan) {

[self.view becomeFirstResponder];

_label.backgroundColor = [UIColor lightGrayColor];

UIMenuController *menu = [UIMenuController sharedMenuController];

//复制

UIMenuItem *copyItem = [[UIMenuItem alloc] initWithTitle:@"复制" action:@selector(copyItemClicked:)];

//收藏

UIMenuItem *collectItem = [[UIMenuItem alloc] initWithTitle:@"收藏" action:@selector(collectItemClicked:)];

//举报

UIMenuItem *reportItem = [[UIMenuItem alloc] initWithTitle:@"举报" action:@selector(reportItemClicked:)];

menu.menuItems = @[copyItem,collectItem,reportItem];

[menu setMenuVisible:YES animated:YES];

[menu setTargetRect:_label.frame inView:self.view];

}

if (sender.state==UIGestureRecognizerStateEnded) {

_label.backgroundColor = [UIColor clearColor];

}

}

- (void)copyItemClicked:(UIMenuItem *)item

{

NSLog(@"复制");

}

- (void)collectItemClicked:(UIMenuItem *)item

{

NSLog(@"收藏");

}

- (void)reportItemClicked:(UIMenuItem *)item

{

NSLog(@"举报");

}

- (BOOL)canBecomeFirstResponder

{

return YES;

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end