3
首先關閉標籤將不起作用。我這樣說是因爲我創建了4個按鈕，並且對於特定的單元格使用相同的標記，例如indexPath.row = tag。如何檢查兩個對象（UIButtons）是否相同
裏面我TableViewCellForRowAtIndexpath
- (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;
}
這裏就是我試圖訪問我在小區創建的單選按鈕。我想這樣做是這樣的
如果（[學分objectAtIndex：1]）== radioButtonA {
做的東西。原因im不說== [radioButtonA標籤]是因爲我有三個其他按鈕都具有相同的標籤。如果你閱讀了代碼，你就會明白爲什麼這些標籤是這樣設置的。 }
我要求的是1幫助，2有另一種方法來檢查兩個按鈕即對象是否相等，而不必依賴於他們的標籤。
不要擔心嘗試捕捉最後我用它來趕上拋出的異常。
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];
}
}
有關詳細信息。在這裏是日誌...
的NSLog（@ 「％@」，[幣objectAtIndex：ⅰ]）; NSLog（@「％@」，radioButtonA）;
THE First output is the log of the [credits object atIndex:i]
UIButton：0x6c91430; frame =（86 110; 32 30）; opaque = NO;層= CALayer：0x6c914f0
2012-06-20 20：24：01.568 TableView [12557：f803] UIButton：0x6ea8ad0; frame =（86 110; 32 30）; opaque = NO; tag = 6;層= CALayer的：0x6e746e0
正如你所看到的UIBUttons是不同的。因此==操作符不工作
==應該正常工作。你有錯誤嗎？如果是這樣，錯誤是什麼？堆棧跟蹤？ – sosborn
與上述評論商定，具體而言，''==應用於對象測試地址是否相等，從而，如果它是由一個不同的變量引用的同一個對象，它會在那個一個地址。 –
這裏是日誌... NSLog（@「％@」，[credits objectAtIndex：i]）; NSLog（@「％@」，radioButtonA）;第一個輸出是[信貸對象atIndex：i]的日誌2012-06-20 20:22:14。219 TableView [12536：f803]>這第二個日誌是radioButtonA的日誌2012-06-20 20:22:14.220 TableView [12536：f803] > –
KING