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！
