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。

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