我有一个带有自定义UITableViewCell(cell.h / .m / .xib)的项目,它有2个标签(labelMain / labelSub),上面有2个按钮(buttonName / buttonInfo)链接到2个动作(showName / showInfo) )。
我想要做的是能够访问我的项目主视图控制器中的2个动作,这样当按下showName时,viewcontroller中的textfield.text(不在单元格中)被设置为该特定单元格的labelMain.text
希望这是有道理的。我的问题是,如果我在cell.m中编写动作(showName),我无法从主视图控制器访问文本字段。另一方面,如果我在viewcontroller中编写动作,我如何知道哪个按钮位于哪个按钮内?
希望这是有道理的......
答案 0 :(得分:16)
使用tag
可以识别正在点击哪个单元格的按钮。
- (UITableViewCell *)tableView:(UITableView *)tableViews cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//init identifier
if (cell ==nil)
{
//load nib file
}
buttonName.tag = indexPath.row;
[buttonName addTarget:self action:@selector(showName:) forControlEvents:UIControlEventTouchUpInside];
buttonInfo.tag = indexPath.row;
[buttonInfo addTarget:self action:@selector(showInfo:) forControlEvents:UIControlEventTouchUpInside];
}
}
-(void) showName:(UIButton*)button{
int row = button.tag; //you know that which row button is tapped
}
-(void)showInfo:(UIButton*)button{
int row = button.tag;//you know that which row button is tapped
}
如果您需要知道基于行和&部分,您可以在下面试试。 (在cellForRowAtIndexPath:
方法中)
int tag = (indexPath.row+1)+(indexPath.section*100);
buttonName.tag = tag;
按下
按钮row = 5,section = 0 then tag = 6.
row = 4,section = 3 then tag = 305。
row = 0,section = 11 then tag = 1101。
限制,行不能超过99.并且不要在其他视图中使用正标记。如果你需要使用标签,请尝试使用否定。 (-1,-9,-100)。
所以从这里开始,你可以计算出后排& indexPath的一部分。用这个:
-(NSIndexPath*)getIndexPathFromTag:(NSInteger)tag{
/* To get indexPath from textfeidl tag,
TextField tag set = (indexPath.row +1) + (indexPath.section*100) */
int row =0;
int section =0;
for (int i =100; i<tag; i=i+100) {
section++;
}
row = tag - (section*100);
row-=1;
return [NSIndexPath indexPathForRow:row inSection:section];
}
使用方法:
-(void)showInfo:(UIButton*)button{
NSIndexPath *indexPath = [self getIndexPathFromTag:button.tag];
int row = indexPath.row;
int section = indexPath.section;
}
答案 1 :(得分:3)
在cellForRowAtIndexPath
方法
[[customCell showNameBtn] setTag:indexPath.row];
[[customCell showNameBtn] addTarget:self action:@selector(showName:) forControlEvents:UIControlEventTouchDown];
-(void) showName:(id)sender
{
// check here the sender tag and then perform you action what you want.
}
答案 2 :(得分:1)
我建议使用委托(协议)方法。您将完全控制按钮,单元格和视图控制器。它也非常简单
答案 3 :(得分:1)
我认为最简单的解决方案:
在CustomCell.h
:
@property (nonatomic, copy) void (^buttonTapAction)(id sender);
在CustomCell.m
创建IBAction
并将其与UIButton
相关联:
-(IBAction)cellButtonIsPressed:(id)sender{
if (self.buttonTapAction) {
self.buttonTapAction(sender);
}
}
然后在管理ViewController.m
的{{1}}中:
UITableView
答案 4 :(得分:0)
尝试动态创建按钮,其方法位于同一个控制器中。在cellForRowAtIndexPath:
方法中执行此操作:
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"WorkRequestedCC" owner:self options:nil];
{
for (id oneObject in nib) if ([oneObject isKindOfClass:[WorkRequestedCC class]])
cell = (WorkRequestedCC *)oneObject;
}
UILabel *costLbl=[[UILabel alloc]initWithFrame:CGRectMake(792, 13, 10, 15)];
costLbl.text=@"$";
[costLbl setBackgroundColor:[UIColor clearColor]];
UITextField *txtCost=[[UITextField alloc]initWithFrame:CGRectMake(805, 10, 94, 27)];
txtCost.backgroundColor=[UIColor whiteColor];
[txtCost setKeyboardType:UIKeyboardTypeNumberPad];
txtCost.text=obj.expCost;
[txtCost addTarget:self action:@selector(textChanged:) forControlEvents:UIControlEventEditingChanged];
[cell.contentView addSubview:costLbl];
[cell.contentView addSubview:txtCost];
cell.lblDes.text=obj.expDes;
}
- (void)textChanged
{
//your code here
}