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 <UIKit/UIKit.h>@protocol TermCellDelegate <NSObject>- (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<TermCellDelegate> 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];    [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。