首先关闭标签将不起作用。我这样说是因为我为特定单元格创建了 4 个按钮，它们都具有相同的标签，即 indexPath.row = 标签。

在我的 TableViewCellForRowAtIndexpath 中

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier = @"courseCell";

//Step 1: Check to se if we can reuse a cell from a row that has just rolled off the screen
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

//step 2: If there are no cell to reuse, create a new one
if (cell == nil){
    cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    cell.selectionStyle = UITableViewCellSelectionStyleGray;
}
...


    //-------------Creation of Custom Buttons-------------// 

    //-----img = "radioOn.png"-----//
    //----img2 = "radioOff.png"----//

    //----RadioButtonA----//
    ...

    radioButtonA = [UIButton buttonWithType:UIButtonTypeCustom];

    [radioButtonA addTarget:self action:@selector(radioButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
    radioButtonA.tag=indexPath.row;

    //----End RadioButtonA----//

    //----RadioButtonB----//

    radioButtonB = [UIButton buttonWithType:UIButtonTypeCustom];
    [radioButtonB addTarget:self action:@selector(radioButtonClicked:)forControlEvents:UIControlEventTouchUpInside];
   radioButtonB.tag =indexPath.row;
...

    //----End RadioButtonB----//

    //----RadioButtonC----//

    radioButtonC = [UIButton buttonWithType:UIButtonTypeCustom];
    [radioButtonC addTarget:self action:@selector(radioButtonClicked:)forControlEvents:UIControlEventTouchUpInside];
    radioButtonC.tag = indexPath.row;
...

    //----End RadioButtonC----//

    //----RadioButtonNA----//

    radioButtonNA = [UIButton buttonWithType:UIButtonTypeCustom];
    radioButtonNA.tag = indexPath.row;
    [radioButtonNA addTarget:self action:@selector(radioButtonClicked:)forControlEvents:UIControlEventTouchUpInside];

    ...

    //----End RadioButtonC----//

    //---------End of Radio Button Creations---------//

    //---------UIStepper & StepperLabel Creation-----//




    [cell.contentView addSubview:radioButtonA];
    [cell.contentView addSubview:radioButtonB];
    [cell.contentView addSubview:radioButtonC];
    [cell.contentView addSubview:radioButtonNA];

//Step4: Return the cell
return cell;
}

#pragma mark - Buttons

- (void)radioButtonClicked:(UIButton *)sender
 {

UIButton *myButton = sender;


// This Method and all the ones similar to this method is created to handle the UITouchUpInsideEvent that the user sends when pressing the radioButtons A-NA.

[radioButtons addObject:sender];

// Create an instance(object) of class NSIndexPath called indexPath and set its value the indexPath of the cell the user is currently in.
UITableViewCell *cell = (UITableViewCell *)[[sender superview] superview];
NSIndexPath *indexPath = [myTableView indexPathForCell:cell];


// Initialize two unique variables in order to check if the buttons being clicked are being referenced in the correct index. 
int row = indexPath.row;
NSLog(@"Button is in row %d", row);

...

}

-(IBAction)button:(UIButton*)sender{
  ...
@try {
    for (i=0; i<8; i++) {

        if ([credits count ] ==0) {
            break; 
        }

这里是我尝试访问我在单元格中创建的单选按钮的地方。我想做的是这个

if([credits objectAtIndex:i]) == radioButtonA{

做事。我不说 == [radioButtonA tag] 的原因是因为我还有其他三个按钮都带有相同的标签。如果您阅读了代码，您就会明白为什么要这样设置标签。

我要的是 1 帮助，2 是否有另一种方法来检查两个按钮(即对象)是否相等，而不必依赖它们的标签。

不要担心 Try catch 最后我用它来捕获抛出的异常。

        if ([[[[credits objectAtIndex:i]titleLabel]text] isEqualToString:@"A"])  {
            NSLog(@"radioA is in array");
            creditHours+=[[valueArray objectAtIndex:i]doubleValue];
            gradeEarned+=(GradeA.doubleValue *[[valueArray objectAtIndex:i]doubleValue]);
            NSLog(@"%f",gradeEarned);
            continue;
        }

        if ([[[[credits objectAtIndex:i]titleLabel]text] isEqualToString:@"B"]) {
            NSLog(@"radioB is in array");
            creditHours+=[[valueArray objectAtIndex:i]doubleValue];
            gradeEarned+=(GradeB.doubleValue *[[valueArray objectAtIndex:i]doubleValue]);
            continue;
        }

        if ([[[[credits objectAtIndex:i]titleLabel]text] isEqualToString:@"C"]){
            NSLog(@"radioC is in array");
            creditHours+=[[valueArray objectAtIndex:i]doubleValue];
            gradeEarned+=(GradeC.doubleValue *[[valueArray objectAtIndex:i]doubleValue]);
            continue;
        }

        if([credits objectAtIndex:i]== radioButtonNA){
            NSLog(@"boboboobbobob");
            continue;
        }
    }
}
@catch (NSException *exception) {
    NSLog(@"NSException Caught");
    NSLog(@"Name: %@",exception.name);
    NSLog(@"Reason: %@", exception.reason);
}
@finally {
    NSLog(@"in finally block");
}

//        if ([credits objectAtIndex: i] == defaulter) {
//                        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Failed to select all grades" message:[NSString stringWithFormat:@"Your grade selections have been reset"] delegate:self cancelButtonTitle:@"great"otherButtonTitles:nil];
//                        [alert show];
//                        [alert release];
//            [self refreshArray];
//        }


NSLog(@"%f",gradeEarned);

if (gradeEarned == 0) {
    textLabel.text= [NSString stringWithFormat:@"%f",gradeEarned];
}else {
    NSLog( @"boob");
    sum= (gradeEarned)/(creditHours);
    NSLog(@"%f",sum);
    textLabel.text= [NSString stringWithFormat:@"%f",sum];
    //[self refreshArray];
}

}

有关更多信息，这是日志...
NSLog(@"%@",[credits objectAtIndex:i]); NSLog(@"%@",radioButtonA);

      THE First output is the log of the [credits object atIndex:i]  

UI按钮:0x6c91430；框架 = (86 110; 32 30);不透明 = 否；层 = CALayer: 0x6c914f0

2012-06-20 20:24:01.568 TableView[12557:f803] UIButton: 0x6ea8ad0;框架 = (86 110; 32 30);不透明 = 否；标签 = 6;层 = CALayer: 0x6e746e0

如您所见，UIBUtton 是不同的，因此 == 运算符不起作用

最佳答案

当检查两个对象时，不能使用 ==，必须使用 [objectA isEqual:objectB]，如果这两个对象相同，则答案为 YES，否则为 NO不是。

要阅读更多信息，请访问:https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Protocols/NSObject_Protocol/Reference/NSObject.html

并检查为 isEqual 编写的内容:

关于ios - 如何检查两个对象 (UIButtons) 是否相同，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11129729/