我试图找出Subviews滚动时UITableview复制的原因。如果我在Subviews内添加IF statement以重复使用它复制的单元格，并重新排序Subviews。如果我把代码放在外面，那么当滚动时将Subviews放在另一个上面会让它变得混乱。以下是我的代码。我做错了什么？
static NSString *cellIdentifier = @"Cell";
UITableViewCell *cell = [_tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
cell.accessoryType = UITableViewCellAccessoryNone;
UIColor *cellBackgroundColor = [rgbConverter convertColor:@"#202e35"];
cell.backgroundColor = cellBackgroundColor;
// cell.contentView.backgroundColor = color;
if ((indexPath.row == 0) && (indexPath.section == 0)) {
fullName = [[UITextField alloc] initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 200, 25)];
fullName.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
fullName.autocorrectionType = UITextAutocorrectionTypeNo;
[fullName setClearButtonMode:UITextFieldViewModeWhileEditing];
fullName.textColor = [UIColor lightGrayColor];
[fullName setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
fullName.returnKeyType = UIReturnKeyNext;
fullName.background = [UIImage imageNamed:@"textfieldBG.png"];
[fullName setTag:1];
[fullName setText:@""];
[cell.contentView addSubview:fullName];
}
if ((indexPath.row == 1) && (indexPath.section == 0)){
accountNumber = [[UITextField alloc] initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 200, 25)];
accountNumber.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
//accountNumber.placeholder = @"MLGW Account Number";
accountNumber.autocorrectionType = UITextAutocorrectionTypeNo;
[accountNumber setClearButtonMode:UITextFieldViewModeWhileEditing];
accountNumber.keyboardType = UIKeyboardTypeNumberPad;
accountNumber.returnKeyType = UIReturnKeyNext;
accountNumber.textColor = [UIColor lightGrayColor];
[accountNumber setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
[accountNumber setTag:2];
[accountNumber setText:@""];
accountNumber.background = [UIImage imageNamed:@"textfieldBG.png"];
[cell.contentView addSubview:accountNumber];
}
if ((indexPath.row == 2) && (indexPath.section == 0)){
address = [[UITextField alloc] initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 200, 25)];
address.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
address.placeholder = @"Address";
address.autocorrectionType = UITextAutocorrectionTypeNo;
[address setClearButtonMode:UITextFieldViewModeWhileEditing];
address.keyboardType = UIKeyboardTypeDefault;
address.returnKeyType = UIReturnKeyNext;
address.textColor = [UIColor lightGrayColor];
[address setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
[address setTag:3];
[address setText:@""];
address.background = [UIImage imageNamed:@"textfieldBG.png"];
[cell.contentView addSubview:address];
}
if ((indexPath.row == 3) && (indexPath.section == 0)){
aptNumber = [[UITextField alloc] initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 200, 25)];
aptNumber.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
aptNumber.placeholder = @"Apartment Number";
aptNumber.autocorrectionType = UITextAutocorrectionTypeNo;
aptNumber.returnKeyType = UIReturnKeyNext;
[aptNumber setClearButtonMode:UITextFieldViewModeWhileEditing];
aptNumber.keyboardType = UIKeyboardTypeNamePhonePad;
aptNumber.textColor = [UIColor lightGrayColor];
[aptNumber setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
[aptNumber setTag:4];
[aptNumber setText:@""];
aptNumber.background = [UIImage imageNamed:@"textfieldBG.png"];
[cell.contentView addSubview:aptNumber];
}
if ((indexPath.row == 4) && (indexPath.section == 0)){
city = [[UITextField alloc] initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 180, 25)];
city.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
city.placeholder = @"City";
city.autocorrectionType = UITextAutocorrectionTypeNo;
city.returnKeyType = UIReturnKeyNext;
[city setClearButtonMode:UITextFieldViewModeWhileEditing];
city.keyboardType = UIKeyboardTypeDefault;
city.textColor = [UIColor lightGrayColor];
[city setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
[city setTag:5];
[city setText:@""];
city.background = [UIImage imageNamed:@"textfieldBG.png"];
[cell.contentView addSubview:city];
zip = [[UITextField alloc] initWithFrame:CGRectMake(cell.frame.origin.x+210, cell.frame.origin.y+10,80, 25)];
zip.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
zip.placeholder = @"Zip";
zip.autocorrectionType = UITextAutocorrectionTypeNo;
zip.returnKeyType = UIReturnKeyNext;
[zip setClearButtonMode:UITextFieldViewModeWhileEditing];
zip.keyboardType = UIKeyboardTypeNumberPad;
zip.textColor = [UIColor lightGrayColor];
[zip setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
[zip setTag:6];
[zip setText:@""];
zip.background = [UIImage imageNamed:@"textfieldBG.png"];
[cell.contentView addSubview:zip];
}
if ((indexPath.row == 5) && (indexPath.section == 0)){
phoneNbr = [[UITextField alloc] initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 200, 25)];
phoneNbr.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
phoneNbr.placeholder = @"Phone Number";
phoneNbr.autocorrectionType = UITextAutocorrectionTypeNo;
phoneNbr.returnKeyType = UIReturnKeyNext;
[phoneNbr setClearButtonMode:UITextFieldViewModeWhileEditing];
phoneNbr.keyboardType = UIKeyboardTypeNumberPad;
phoneNbr.textColor = [UIColor lightGrayColor];
[phoneNbr setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
[phoneNbr setTag:7];
[phoneNbr setText:@""];
phoneNbr.background = [UIImage imageNamed:@"textfieldBG.png"];
[cell.contentView addSubview:phoneNbr];
}
if ((indexPath.row == 6) && (indexPath.section == 0)){
emailAddress = [[UITextField alloc] initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 200, 25)];
emailAddress.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
emailAddress.placeholder = @"Email Address";
emailAddress.returnKeyType = UIReturnKeyNext;
emailAddress.autocorrectionType = UITextAutocorrectionTypeNo;
[emailAddress setClearButtonMode:UITextFieldViewModeWhileEditing];
emailAddress.keyboardType = UIKeyboardTypeEmailAddress;
emailAddress.textColor = [UIColor lightGrayColor];
[emailAddress setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
[emailAddress setTag:8];
[emailAddress setText:@""];
emailAddress.background = [UIImage imageNamed:@"textfieldBG.png"];
[cell.contentView addSubview:emailAddress];
}
if ((indexPath.row == 7) && (indexPath.section == 0)){
validateEmail = [[UITextField alloc] initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 200, 25)];
validateEmail.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
validateEmail.placeholder = @"Re-enter Email Address";
validateEmail.returnKeyType = UIReturnKeyNext;
validateEmail.autocorrectionType = UITextAutocorrectionTypeNo;
[validateEmail setClearButtonMode:UITextFieldViewModeWhileEditing];
validateEmail.keyboardType = UIKeyboardTypeEmailAddress;
validateEmail.textColor = [UIColor lightGrayColor];
[validateEmail setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
[validateEmail setTag:9];
[validateEmail setText:@""];
validateEmail.background = [UIImage imageNamed:@"textfieldBG.png"];
[cell.contentView addSubview:validateEmail];
}
if ((indexPath.row == 0) && (indexPath.section == 1)){
oneTimeDonationBtn = [[UIButton alloc]initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 38, 32)];
[oneTimeDonationBtn setImage:[UIImage imageNamed:@"radioBox.png"] forState:UIControlStateNormal];
[oneTimeDonationBtn addTarget:self action:@selector(oneTimeAmountAction:) forControlEvents:UIControlEventTouchUpInside];
oneTimeDonation = [[UITextField alloc] initWithFrame:CGRectMake(oneTimeDonationBtn.frame.origin.x+35, cell.frame.origin.y+13, 150, 25)];
oneTimeDonation.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
oneTimeDonation.placeholder = @"One Time Donation";
oneTimeDonation.autocorrectionType = UITextAutocorrectionTypeNo;
oneTimeDonation.returnKeyType = UIReturnKeyNext;
[oneTimeDonation setClearButtonMode:UITextFieldViewModeWhileEditing];
oneTimeDonation.keyboardType = UIKeyboardTypeDecimalPad;
oneTimeDonation.textColor = [UIColor lightGrayColor];
[oneTimeDonation setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
[oneTimeDonation setTag:10];
[oneTimeDonation setText:@""];
oneTimeDonation.background = [UIImage imageNamed:@"textfieldBG.png"];
[cell.contentView addSubview:oneTimeDonationBtn];
[cell.contentView addSubview:oneTimeDonation];
}
if ((indexPath.row == 0) && (indexPath.section == 2)){
oneDollarBtn = [[UIButton alloc]initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 38, 32)];
[oneDollarBtn setImage:[UIImage imageNamed:@"radioBox.png"] forState:UIControlStateNormal];
[oneDollarBtn addTarget:self action:@selector(oneDollarAction:) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:oneDollarBtn];
oneDollarLbl = [[UILabel alloc ] initWithFrame:CGRectMake(oneDollarBtn.frame.origin.x+35, cell.frame.origin.y+10, 38, 32)];
oneDollarLbl.text = @"$1";
oneDollarLbl.textColor = [UIColor lightGrayColor];
[cell.contentView addSubview:oneDollarLbl];
fiveDollarBtn = [[UIButton alloc]initWithFrame:CGRectMake(oneDollarLbl.frame.origin.x+35, cell.frame.origin.y+10, 38, 32)];
[fiveDollarBtn setImage:[UIImage imageNamed:@"radioBox.png"] forState:UIControlStateNormal];
[fiveDollarBtn addTarget:self action:@selector(fiveDollarAction:) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:fiveDollarBtn];
fiveDollarLbl = [[UILabel alloc ] initWithFrame:CGRectMake(fiveDollarBtn.frame.origin.x+35, cell.frame.origin.y+10, 38, 32)];
fiveDollarLbl.text = @"$5";
fiveDollarLbl.textColor = [UIColor lightGrayColor];
[cell.contentView addSubview:fiveDollarLbl];
tenDollarBtn = [[UIButton alloc]initWithFrame:CGRectMake(fiveDollarLbl.frame.origin.x+35, cell.frame.origin.y+10, 38, 32)];
[tenDollarBtn setImage:[UIImage imageNamed:@"radioBox.png"] forState:UIControlStateNormal];
[tenDollarBtn addTarget:self action:@selector(tenDollarAction:) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:tenDollarBtn];
tenDollarLbl = [[UILabel alloc ] initWithFrame:CGRectMake(tenDollarBtn.frame.origin.x+35, cell.frame.origin.y+10, 38, 32)];
tenDollarLbl.text = @"$10";
tenDollarLbl.textColor = [UIColor lightGrayColor];
[cell.contentView addSubview:tenDollarLbl];
}
if ((indexPath.row == 1) && (indexPath.section == 2)){
otherAmountBtn = [[UIButton alloc]initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 38, 32)];
[otherAmountBtn setImage:[UIImage imageNamed:@"radioBox.png"] forState:UIControlStateNormal];
[otherAmountBtn addTarget:self action:@selector(otherAmountAmountAction:) forControlEvents:UIControlEventTouchUpInside];
otherAmount = [[UITextField alloc] initWithFrame:CGRectMake(otherAmountBtn.frame.origin.x+35, cell.frame.origin.y+13, 150, 25)];
otherAmount.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
otherAmount.placeholder = @"Other Amount";
otherAmount.autocorrectionType = UITextAutocorrectionTypeNo;
otherAmount.returnKeyType = UIReturnKeyNext;
[otherAmount setClearButtonMode:UITextFieldViewModeWhileEditing];
otherAmount.keyboardType = UIKeyboardTypeDecimalPad;
otherAmount.textColor = [UIColor lightGrayColor];
[otherAmount setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
[otherAmount setTag:10];
[otherAmount setText:@""];
otherAmount.background = [UIImage imageNamed:@"textfieldBG.png"];
[cell.contentView addSubview:otherAmountBtn];
[cell.contentView addSubview:otherAmount];
}
if ((indexPath.row == 0) && (indexPath.section == 3)){
comments = [[UITextView alloc] initWithFrame:CGRectMake(cell.frame.origin.x+10, cell.frame.origin.y+10, 280, 100)];
comments.font = [UIFont fontWithName:@"HelveticaNeue" size:15];
comments.autocorrectionType = UITextAutocorrectionTypeNo;
comments.keyboardType = UIKeyboardTypeDefault;
comments.textColor = [UIColor lightGrayColor];
[comments setTag:11];
[comments setText:@""];
comments.contentInset = UIEdgeInsetsMake(2.0, 1.0, 0.0, 0.0);
[cell.contentView addSubview:comments];
}
}
//cell.imageView.image = [UIImage imageNamed:@"settings_icon.png"];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.backgroundColor = [UIColor clearColor];
return cell;
}
答案 0 :(得分：0)
当您仅使用一个cellIdentifier通过调用dequeueReusableCellWithIdentifier方法重用不同类型的单元格时会发生这种情况。
在您的代码中，您在不同的indexPath上添加了不同的视图，但您不知道dequeueReusableCellWithIdentifier方法给出了哪个单元格。
例如，当您向重用的单元格添加address视图时，它可能已经有一个fullName子视图。然后你会得到意想不到的结果。
有很多方法可以解决这个问题。
以下是我认为对你的情况很容易的两个，你可以选择任何你喜欢的人：
由于您的手机内容不是＆＃34;可重复使用＆＃34;，如果性能不是问题，我建议您根本不要使用dequeueReusableCellWithIdentifier。
您最好对不同类型的细胞使用不同的cellIdentifier。
答案 1 :(得分：0)
主要原因是，dequeueReusableCellWithIdentifier，顾名思义，无论顺序如何，都会获取已创建的单元格。我猜它只缓存了与可见细胞一样多的细胞。
向上滚动时，它会为您提供一个已创建（并已填充）的单元格。
用此替换单元格创建：
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier forIndexPath:indexPath];
同时删除if（cell == nil）。同时删除其他单元格创建
请记住dequeueReusableCellWithIdentifier：forIndexPath：永远不会返回nil。因此，最好检查单元格是否已填充以跳过子视图创建。
答案 2 :(得分：0)
您的代码有点难以理解。
每次你必须经常自定义单元格时，不应该使用UITableViewCell，而应该将其子类化，并在自定义类中自定义它。
根据我的经验，我发现当涉及部分和行时，语句是否复杂。
我建议你使用switch语句，你可以为每个案例提供逻辑。
这将使你的生活更轻松，这就是：
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
switch (indexPath.section) {
case 0:
switch (indexPath.row) {
case 0:
//fullName custom cell
break;
case 1:
//account number custom cell
break;
default:
break;
}
break;
default:
break;
}
return cell;
}
答案 3 :(得分：0)
首先将textfield标记设置为某个常量，可以使用单元格indexPath来获取文本字段。如果下面没有文本字段，则添加文本字段;
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
//check if you already have textfield, say a constant tag is 100
UITextField *myTextField ;
if(cell){
myTextField = (UITextField *)[cell.contentView viewWithTag:100];
}
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
//now if myTextField is nil then only init it
if(!myTextField){
//Configure textfield here and add to cell content view
}
}
//now all things are configure for cell , assign whatever text you want to myTextField
if(indexPath.row == 0 && indexPath.section == 0){
//.......
[myTextField setText:@"XYZ"];
}
}