IOS--UITableViewCell上的按钮点击事件处理

今天突然做项目的时候，又遇到处理自定义的UITableViewCell上按钮的点击事件问题。我知道有两种方式，可是突然想不起来之前是怎么做的了，好记性不如烂笔头，还是记录一下吧。

1、第一种方式给Button加上tag值

这里分为两种：一种是直接在原生的UITableViewCell上添加UIButton按钮，然后给UIButton设置tag值，然后在控制器里的方法里通过取数据，做界面跳转等。还是举个例子吧，省的回忆半天。

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
 {

     static NSString *identifier = @"Cell";

     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuseIdentifier];
     if (cell == nil) {
          cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
         cell.selectionStyle = UITableViewCellSelectionStyleNone;
     }
      User *user = _users[indexPath.row];
     cell.user = user;
     //拍照button
     UIButton  *photographButton = [UIButton buttonWithType:UIButtonTypeCustom];
     photographButton.frame = CGRectMake(221 , 10, 100, 44);
     [photographButton setImage:[UIImage imageNamed:@"camera.png"] forState:UIControlStateNormal];
     [photographButton addTarget:self action:@selector(photographButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
     photographButton.tag = indexPath.row;
     [cell.contentView addSubview:photographButton];

     return cell;
 }

然后在点击事件中取数据，加信息

 - (void)photographButtonClicked:(UIButton *)sender{
      User *user = _users[sender.tag];
     PhotoPickerController *photoPicker = [[PhotoPickerController alloc] init];
     photoPicker.user = user;
     [self.navigationController pushViewController:photoPicker animated:YES];

 }

以上两个方法都是在同一个控制器中。

2、自定义了UITableViewCell，那么就在UITableViewCell里添加一个代理方法。

 #import

 @protocol TermCellDelegate

 - (void)choseTerm:(UIButton *)button;

 @end

 @interface TermCell : UITableViewCell

 @property (retain, nonatomic) IBOutlet UIButton *checkButton;
 @property (retain, nonatomic) IBOutlet UILabel *termLabel;

 @property (assign, nonatomic) BOOL  isChecked;
 @property (assign, nonatomic) id delegate;

 - (IBAction)checkAction:(UIButton *)sender;

 @end

 #import "TermCell.h"

 @implementation TermCell

 - (void)awakeFromNib
 {
     // Initialization code
 }

 - (void)setSelected:(BOOL)selected animated:(BOOL)animated
 {
     [super setSelected:selected animated:animated];

     // Configure the view for the selected state
 }

 - (void)layoutSubviews
 {
     [super layoutSubviews];
     if (_isChecked) {
         [_checkButton setBackgroundImage:[UIImage imageNamed:@"task_state_checked"] forState:UIControlStateNormal];
     } else {
         [_checkButton setBackgroundImage:[UIImage imageNamed:@"task_state_unchecked"] forState:UIControlStateNormal];
     }
 }

 - (void)dealloc {
     [_checkButton release];
     [_termLabel release];
     [super dealloc];
 }

 - (IBAction)checkAction:(UIButton *)sender {
     if ([_delegate respondsToSelector:@selector(choseTerm:)]) {
         sender.tag = self.tag;
         [_delegate choseTerm:sender];
     }
 }

 @end

然后再控制器中实现Cell的代理方法即可

 #pragma mark - TermCellDelegate
 - (void)choseTerm:(UIButton *)button
 {
     _clickIndex = button.tag;
     UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"确定修改学期吗？" message:nil delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil nil];
     [alertView show];
 }

当然，这里也可以做界面跳转，取数据依然用button的tag值。

补充：这里还可以在代理方法中将cell本身传回去，这样不用从数组取数据，直接利用cell的数据对象，更简单吆。

3、是直接在自定义的Cell里面跳转，这种耦合性比较强。思路先是找到button的父控制器，然后做界面跳转或者其他操作。有这样一个工具方法

 #import "UIView+Additions.h"

 @implementation UIView (Additions)

 - (UIViewController *)viewController
 {
     UIResponder *next = [self nextResponder];
     do {
         if ([next isKindOfClass:[UIViewController class]]) {
             return (UIViewController *)next;
         }

         next = [next nextResponder];

     } while (next != nil);


     return nil;
 }

头文件就不写了，很简单的扩展。

 - (void)setWeiboModel:(WeiboModel *)weiboModel
 {
     if (_weiboModel != weiboModel) {
         [_weiboModel release];
         _weiboModel = [weiboModel retain];
     }

     __block WeiboCell *this = self;
     _userImage.touchBlock = ^{
         NSString *nickName = this.weiboModel.user.screen_name;
         UserViewController *userCtrl = [[UserViewController alloc] init];
         userCtrl.userName = nickName;
         [this.viewController.navigationController pushViewController:userCtrl animated:YES];
         [userCtrl release];
     };

 }

这里是给Cell赋值model,然后点击事件是用Block实现的。