如何在 tableviewcell 中自定义按钮？答案

【问题标题】：How to customize a button in tableviewcell?如何在 tableviewcell 中自定义按钮？
【发布时间】：2015-04-02 06:20:04
【问题描述】：

我正在开发一个 iOS 应用程序，我正在使用 Xcode 6。

我以编程方式在 tableview 单元格中创建了 5 个按钮。我想一次只自定义一个按钮。这意味着当我单击一个按钮时，它必须放大，而其他按钮将保持默认大小。

现在的问题是当我点击一个按钮时，它会放大，如果我点击另一个按钮，它也会放大。但我想将剩余的按钮保持在我在 CGRect 函数中输入的默认大小。

这是我的代码：

#import "ViewController.h"

@interface ViewController ()

{



    UITableViewCell *cell;

    UIButton *b2,*b1;



}

//@property(strong,nonatomic)UIButton *b3,*b4,*b5;

//@property(strong,nonatomic)UIButton *b1,*b2;



@end



@implementation ViewController
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    return 5;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
UIButton  *b1=[UIButton buttonWithType:UIButtonTypeCustom];

  b1.frame=CGRectMake(13.0, 40.0, 40.0, 40.0);

 [b1 setTag:1];

   [b1 addTarget:self action:@selector(modify:) forControlEvents:UIControlEventTouchUpInside];

[b1 setBackgroundColor:[UIColor blueColor]];

  [b1 setTitle:@"Blue" forState:UIControlStateNormal];

UIBButton *b2=[UIButton buttonWithType:UIButtonTypeCustom];
  b2.frame=CGRectMake(73.0, 40.0, 40.0, 40.0);
 [b2 setTag:2];
 [b2 addTarget:self action:@selector(modify1:) forControlEvents:UIControlEventTouchUpInside];
 [b2 setBackgroundColor:[UIColor redColor]];
[b2 setTitle:@"red" forState:UIControlStateNormal];
  UIButton  *b3=[UIButton buttonWithType:UIButtonTypeCustom];
  b3.frame=CGRectMake(133.0, 40.0, 40.0, 40.0);
  [b3 setTag:3];
 [b3 addTarget:self action:@selector(modify2:) forControlEvents:UIControlEventTouchUpInside];
  [b3 setBackgroundColor:[UIColor greenColor]];
  [b3 setTitle:@"Green" forState:UIControlStateNormal];
 UIButton *b4=[UIButton buttonWithType:UIButtonTypeCustom];
 b4.frame=CGRectMake(193.0, 40.0,40.0, 40.0);
 [b4 setTag:4];
 [b4 addTarget:self action:@selector(modify3:) forControlEvents:UIControlEventTouchUpInside];
 [b4 setBackgroundColor:[UIColor blackColor]];
  [b4 setTitle:@"Black" forState:UIControlStateNormal];
 UIButton *b5=[UIButton buttonWithType:UIButtonTypeCustom];
 b5.frame=CGRectMake(253.0, 40.0, 40.0, 40.0);
 [b5 setTag:5];
 [b5 addTarget:self action:@selector(modify4:) forControlEvents:UIControlEventTouchUpInside];
 [b5 setBackgroundColor:[UIColor orangeColor]];
[b5 setTitle:@"Orange" forState:UIControlStateNormal];

     [cell addSubview:b1];

     [cell addSubview:b2];

     [cell addSubview:b3];

     [cell addSubview:b4];

     [cell addSubview:b5];

 return cell;

 }

-(void)modify:(UIButton *)btn

{
 if (btn.tag==1) {
    btn.frame=CGRectMake(13.0, 40.0, 60.0, 60.0);
 }
 if (btn.tag!=1)
      {
   btn.frame=CGRectMake(73.0, 40.0, 40.0, 40.0);
 btn.frame=CGRectMake(133.0, 40.0, 40.0, 40.0);
        btn.frame=CGRectMake(193.0, 40.0, 40.0, 40.0);
       btn.frame=CGRectMake(253.0, 40.0, 40.0, 40.0);
    }
}
-(void)modify1:(UIButton *)btn1
{

 if (btn1.tag==2) {

    btn1.frame=CGRectMake(73.0, 40.0, 60.0, 60.0);
 if (btn1.tag==1) {
btn1.frame=CGRectMake(13.0, 40.0, 40.0, 40.0);
  }
}
-(void)modify2:(UIButton *)btn2
{
 if (btn2.tag==3) {
 btn2.frame=CGRectMake(133.0, 40.0, 60.0, 60.0);

    }
}
-(void)modify3:(UIButton *)btn3
{
if (btn3.tag==4) {
  btn3.frame=CGRectMake(193.0, 40.0, 60.0, 60.0);
  if (btn3.tag==3) {
      btn3.frame=CGRectMake(133.0, 40.0, 40.0, 40.0);
    }

    if (btn3.tag==2) {
     btn3.frame=CGRectMake(73.0, 40.0, 40.0, 40.0);

     }

     if (btn3.tag==1) {
       btn3.frame=CGRectMake(13.0, 40.0, 40.0, 40.0);
   }

     if (btn3.tag==5) {
    btn3.frame=CGRectMake(253.0, 40.0, 40.0, 40.0);

     }

 }

}

-(void)modify4:(UIButton *)btn4

{
 if (btn4.tag==5) {
    btn4.frame=CGRectMake(253.0, 40.0, 60.0, 60.0);
   if (btn4.tag==4) {
      btn4.frame=CGRectMake(193.0, 40.0, 40.0, 40.0);

        }

    if (btn4.tag==3) {

            btn4.frame=CGRectMake(133.0, 40.0, 40.0, 40.0);

        }

       if (btn4.tag==2) {
       btn4.frame=CGRectMake(73.0, 40.0, 40.0, 40.0);

        }

       if (btn4.tag==1) {
       btn4.frame=CGRectMake(13.0, 40.0, 40.0, 40.0);
     }

}

}

}

【问题讨论】：

标签： objective-c uitableview uibutton tableviewcell cgrectmake

【解决方案1】：

不要做很多事情，而是做以下更改：在下面的方法中：

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
         static NSString *MyIdentifier = @"MyIdentifier";
         UITableViewCell  *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];
            UILabel *lblFirst=nil;
            UILabel *lblSecond=nil;

            UITableViewCellStyle style =UITableViewCellStyleSubtitle;
            if (cell == nil)
            {
                cell = [[[UITableViewCell alloc] initWithStyle:style reuseIdentifier:MyIdentifier] autorelease];
                //Account
                lblFirst = [[UILabel alloc] initWithFrame:CGRectInset(CGRectMake(0, 0, 130,
                                                                                 iRowHeight),10,2)] ;
                lblFirst.tag=1;

                [self labelCommonSettingsLeftAlign:lblFirst];
                [cell.contentView addSubview:lblFirst];
                //----------------------------------------
                //name
                lblSecond =  [[UILabel  alloc] initWithFrame:CGRectInset(CGRectMake(131, 0, 130,
                                                                                    iRowHeight),10,2)] ;
                lblSecond.tag=2;

                [self labelCommonSettingsLeftAlign:lblSecond];
                [cell.contentView addSubview:lblSecond];


                [lblFirst release];
                lblFirst=nil;
                [lblSecond release];
                lblSecond=nil;
            }

            lblFirst = (UILabel *)[cell.contentView viewWithTag:1];
            lblSecond = (UILabel *)[cell.contentView viewWithTag:2];



      /*//Here u can check the condition of selected tag and indexpath.row.
       for e.g if(selectedTag==indexpath.row)
       {
             //change button size to New Size
        }
       else 
        {
              //change button size to Old Size
        }*/
   return cell;
}

现在在上面的代码中，我在单元格上添加了两个标签。而不是 U 可以在单元格上添加按钮。现在，每当您点击按钮时，您都会获得按钮标签。通过检查cellForRowAtIndexPath 中的tag value 和单元格indexpath.row，您可以更改所选按钮和其他按钮的按钮框架。为此，您需要调用表格视图reloadData 函数。确保 selectedIndex 初始化为 -1。

【讨论】：

我无法在按钮方法中获得正确的 indexpath 值。
在按钮方法中，您必须设置选定的索引并调用 relaodData 函数。
问题是我无法使用 indexpath 或 Button Action.cellForAtIndexPath 中的任何其他方法访问其他按钮，我获取所有值。
我没有得到所选索引的正确值。在 NSLog 中它显示为空

【解决方案2】：

也许这可以帮助您获得正确的索引

    -(void)modify4:(UIButton *)sender {
         GPoint buttonPosition = [sender convertPoint:CGPointZero toView:self.tableView];
         NSIndexPath *currentPhotoIndexPath = [self.tableView  indexPathForItemAtPoint:buttonPosition];
           .....
    }

【讨论】：

【解决方案3】：

    [btn1 addTarget:self action:@selector(increaseAction:) forControlEvents:UIControlEventTouchUpInside];
    [btn2 addTarget:self action:@selector(increaseAction:) forControlEvents:UIControlEventTouchUpInside];
    [btn3 addTarget:self action:@selector(increaseAction:) forControlEvents:UIControlEventTouchUpInside];
    [btn4 addTarget:self action:@selector(increaseAction:) forControlEvents:UIControlEventTouchUpInside];
    [btn5 addTarget:self action:@selector(increaseAction:) forControlEvents:UIControlEventTouchUpInside];


    btn1.tag=1;
    btn2.tag=2;
    btn3.tag=3;
    btn4.tag=4;
    btn5.tag=5;

-(IBAction)increaseAction:(id)sender
{

    UIButton *button = (UIButton *) sender;
    //Here perform the desired operation

}

【讨论】：