iOS开发——项目总结OC篇&iOS 长按事件菜单的实现（剪切版）

   
    [self.label addGestureRecognizer:[[UILongPressGestureRecognizer alloc] 
       
initWithTarget:self action:@selector(labelClick)]];

 1 - (void)labelClick
 2 {
 3     // 获得菜单
 4     UIMenuController *menu = [UIMenuController sharedMenuController];
 5    
 6     // 菜单最终显示的位置
 7     CGRect rect = CGRectMake(100, 100, 100, 100);
 8     [menu setTargetRect:rect inView:self.label];
 9     /*
10      targetRect：menuController指向的矩形框
11      targetView：targetRect以targetView的左上角为坐标原点
12      */
13    
14     // 显示菜单
15     [menu setMenuVisible:YES animated:YES];
16    
17     /*
18      得通过第一响应者，来告诉MenuController它内部应该显示什么内容
19      */
20 }
21  

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

 1 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
 2 {
 3     // 取出cell
 4     UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
 5    
 6     UIMenuController *menu = [UIMenuController sharedMenuController];
 7    
 8     // 设置菜单内容
 9     menu.menuItems = @[
10                        [[UIMenuItem alloc] initWithTitle:@"顶" action:@selector(ding:)],
11                        [[UIMenuItem alloc] initWithTitle:@"回复" action:@selector(reply:)],
12                        [[UIMenuItem alloc] initWithTitle:@"举报" action:@selector(warn:)]
13                        ];
14    
15     // 显示位置
16     CGRect rect = CGRectMake(0, cell.height * 0.5, cell.width, 1);
17     [menu setTargetRect:rect inView:cell];
18    
19     // 显示出来
20     [menu setMenuVisible:YES animated:YES];
21 }

 1 #pragma mark - 获得当前选中的评论
 2 - (XMGComment *)selectedComment
 3 {
 4     // 获得被选中的cell的行号
 5     NSIndexPath *indexPath = self.tableView.indexPathForSelectedRow;
 6     NSInteger row = indexPath.row;
 7    
 8     // 获得评论数据
 9     NSArray *comments = self.latestComments;
10     if (indexPath.section == 0 && self.hotComments.count) {
11         comments = self.hotComments;
12     }
13    
14     return comments[row];
15 }
16  
17  

 1 #pragma mark - UIMenuController处理
 2 - (BOOL)canBecomeFirstResponder
 3 {
 4     return YES;
 5 }
 6 
 7 - (BOOL)canPerformAction:(SEL)action withSender:(id)sender
 8 {
 9     if (!self.isFirstResponder) { // 文本框弹出键盘, 文本框才是第一响应者
10         if (action == @selector(ding:)
11             || action == @selector(reply:)
12             || action == @selector(warn:)) return NO;
13     }
14    
15     return [super canPerformAction:action withSender:sender];
16 }
17  

 1 - (void)ding:(UIMenuController *)menu
 2 {
 3     XMGLog(@"ding - %@ %@",
 4            self.selectedComment.user.username,
 5            self.selectedComment.content);
 6 }
 7 
 8 - (void)reply:(UIMenuController *)menu
 9 {
10     XMGLog(@"reply - %@ %@",
11            self.selectedComment.user.username,
12            self.selectedComment.content);
13 }
14 
15 - (void)warn:(UIMenuController *)menu
16 {
17     XMGLog(@"warn - %@ %@",
18            self.selectedComment.user.username,
19            self.selectedComment.content);
20 }