首先关闭标签不会工作。我这样说是因为我创建了4个按钮，它们都具有相同的特定单元格标记，即indexPath.row = tag。
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;
}
这是我试图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 {
做的事。我不说== [radioButtonA标签]的原因是因为我有三个其他按钮都具有相同的标签。如果你读了代码，你就会明白为什么用这种方式设置标签。 }
我要求的是1个帮助，2是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];
}
}
更多信息以下是日志...
NSLog（@“％@”，[credits objectAtIndex：i]）;
的NSLog（@ “％@”，radioButtonA）;
THE First output is the log of the [credits object atIndex:i]
UIButton：0x6c91430; frame =（86 110; 32 30）; opaque = NO; layer = CALayer：0x6c914f0
2012-06-20 20：24：01.568 TableView [12557：f803] UIButton：0x6ea8ad0; frame =（86 110; 32 30）; opaque = NO; tag = 6; layer = CALayer：0x6e746e0
如您所见，UIBUttons是不同的，因此==运算符不起作用
答案 0 :(得分：5)
当检查两个对象时，你不能使用==，你必须使用[objectA isEqual:objectB]，如果这两个对象相同，则答案为YES，如果不是，则为NO。
并检查为isEqual写的内容：
答案 1 :(得分：0)
我不确定，在这个方法中，
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;
你应该只在单元格为nil时添加按钮。就像这样
- (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;
}
答案 2 :(得分：0)
我已经知道这一点，但是，这篇文章的目的是看看他们是否有其他方式。我还使用isMemberOfClass：[UIButton类]进一步缩小范围。最好的方法和最有效的方法是使用对象的标签进行比较。