objective-c - UITableView滚动后UITextFields重叠
<p><p>我有一个带有 UITextFields 的 UITableView 来制作表单。它看起来很棒——除非你滚动新的 UITextFields 被放在旧的 UITextFields 之上......我不知道为什么!我知道当单元格被重用时(即 dequeueReusableCellWithIdentifier 返回非零)，单元格与现有的 UITextField 返回。我找到了一个解决方案来保持标签的唯一性，最好删除任何以前的 UITextField。但我不想那样做。在提交此表单的最后，我想从文本字段中获取所有值(如果我删除它们就不能这样做)..</p>
<p>这里是代码。任何帮助表示赞赏!</p>
<pre><code>- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = (UITableViewCell *) ;
if (cell == nil)
cell = [ initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
cell.accessoryType = UITableViewCellAccessoryNone;
UITextField *playerTextField = [ initWithFrame:CGRectMake(155, 15, 130, 30)];
playerTextField.adjustsFontSizeToFitWidth = YES;
playerTextField.textColor = ;
if (indexPath.row == 0) {
playerTextField.placeholder = @"Unique ID Sample";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyNext;
}
else if (indexPath.row == 1) {
playerTextField.placeholder = @"Common Name";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if (indexPath.row == 2) {
playerTextField.placeholder = @"Scientific Name";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 3) {
playerTextField.placeholder = @"03/25/1992";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 4) {
playerTextField.placeholder = @"Male";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 5) {
playerTextField.placeholder = @"03/01/2012";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 6) {
playerTextField.placeholder = @"Huntington, WV";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 7) {
playerTextField.placeholder = @"Huntington, WV";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 8) {
playerTextField.placeholder = @"Marshall University";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 9) {
playerTextField.placeholder = @"Sub Straight";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 10) {
playerTextField.placeholder = @"Any Light";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 11) {
playerTextField.placeholder = @"Temperature";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 12) {
playerTextField.placeholder = @"A Lot";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 13) {
playerTextField.placeholder = @"All Types";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 14) {
playerTextField.placeholder = @"Schedule";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 15) {
playerTextField.placeholder = @"MM/DD/YYYY";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 16) {
playerTextField.placeholder = @"Ate Someone";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 17) {
playerTextField.placeholder = @"MM/DD/YYYY";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 18) {
playerTextField.placeholder = @"The Morgue";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 19) {
playerTextField.placeholder = @"MM/DD/YYYY";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 20) {
playerTextField.placeholder = @"MM/DD/YYYY";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
else if ( == 21) {
playerTextField.placeholder = @"To/ From";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyDone;
}
playerTextField.backgroundColor = ;
playerTextField.autocorrectionType = UITextAutocorrectionTypeNo; // no auto correction support
playerTextField.autocapitalizationType = UITextAutocapitalizationTypeNone; // no auto capitalization support
playerTextField.textAlignment = UITextAlignmentLeft;
playerTextField.tag = 0;
playerTextField.clearButtonMode = UITextFieldViewModeNever; // no clear 'x' button to the right
;
;
;
cell.textLabel.text = ;
return cell;
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>您将不得不创建一个自定义 <code>UITableViewCell</code>。这将允许您使用可以直接访问的 <code>UITextField</code> 创建一个 <code>ivar</code>。这样，当单元格出列并重用时，您只需在需要时进行设置。请务必在您的单元子类中覆盖 <code>prepareForReuse:</code> 并重置您添加的组件的所有属性。</p>
<p>上面的代码可以帮助你的另一件事是使用 <code>typedef enum</code> 而不是使用整数来确定它是什么类型的单元格:</p>
<pre><code>typedef enum{
PlayerFieldId = 0,
PlayerFieldName,
PlayerFieldGender
} PlayerFields
</code></pre>
<p>然后在您的自定义单元格中，您可以通过上面的枚举和 switch 语句设置单元格的类型:</p>
<pre><code>switch(type){
case PlayerFieldId:
playerTextField.placeholder = @"Unique ID Sample";
playerTextField.keyboardType = UIKeyboardTypeDefault;
playerTextField.returnKeyType = UIReturnKeyNext;
break;
/* other fields here */
}
</code></pre></p>
<p style="font-size: 20px;">关于objective-c - UITableView滚动后UITextFields重叠，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/10112320/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/10112320/
</a>
</p>
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