IOS UITableViewCell详解及按钮点击事件处理实例

IOS UITableViewCell详解及按钮点击事件处理

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 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。

感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！