[英]How to get UITextfield value from custom UItableViewCell. If UITableviewCell have multiple UITextFields without using tag property
[英]How to get dynamically created UITextField (on top of UITableViewCell ) text value using tag?
我有一個UITableView,並且在那個UITableViewCell中動態創建了“ n”個UITextField。 如何使用標記獲取輸入到UITextField中的值?
這就是我動態創建UITextField的方式
-(UITextField *)displayTextfield:(NSUInteger)index{
textField= [[UITextField alloc] initWithFrame:CGRectMake(15,40,cell.frame.size.width-30,cell.frame.size.height)];
textField.placeholder=@"Text here";
textField.tag=index;
textField.delegate=self;
textField.keyboardType=UIKeyboardTypeNumbersAndPunctuation;
textField.textAlignment=UITextAlignmentLeft;
textField.font= [UIFont fontWithName:@"Helvetica-Neue Light" size:14];
textField.textColor=[UIColor darkGrayColor];
textField.backgroundColor=[UIColor colorWithRed:245.0/255.0 green:245.0/255.0 blue:245.0/255.0 alpha:1];
return textField;
}
這是我嘗試訪問UITextField值但崩潰的方式。
NSString *text = [(UITextField *)[cell.contentView viewWithTag:index] text];
index
(標記)是從for循環獲取的。
-[UITableViewCellContentView text]: unrecognized selector sent to instance 0x7fa8329d9360
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UITableViewCellContentView text]: unrecognized selector sent to instance 0x7fa8329d9360'
請幫我解決這個問題
displayTextfield()從這里調用
- (UITableViewCell *)tableView:(UITableView *)tableView1 cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *MyIdentifier;
if([[[selectedTabFields valueForKey:@"type"] objectAtIndex:indexPath.row] isEqualToString:@"VARCHAR"]){
MyIdentifier = @"CharCell";
}else{
MyIdentifier = @"IntCell";
}
cell= [tableView1 dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil)
{
cell = [[dynamicCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:MyIdentifier];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.accessoryType = UITableViewCellAccessoryNone;
[cell.contentView addSubview:[self displayTextfield:indexPath.row]];
}
return cell;
}
cell.contentView.subviews中的第零個索引cell.contentView.subviews
名為UITableViewCellContentView
的特殊視圖獲取,因此當indexPath.row
為0
時,以下行不會返回UITextField:
>>> NSLog("%@", [cell.contentView viewWithTag:0])
<UITableViewCellContentView: 0x7fb7c2eb1cd0; frame = (0 0; 320 43.5); gestureRecognizers = <NSArray: 0x7fb7c2eb22a0>; layer = <CALayer: 0x7fb7c2eb1e40>
將標簽值更改為更大的值,這應該可以解決此問題:
[cell.contentView addSubview:[self displayTextfield:indexPath.row + 1]];
因此,當您需要再次獲取UITextField時:
NSString *text = [(UITextField *)[cell.contentView viewWithTag:indexPath.row + 1] text];
將函數的第一行固定為:
UITextField * textField= [[UITextField alloc] initWithFrame:CGRectMake(15,40,cell.frame.size.width-30,cell.frame.size.height)];
其次,將標簽+1分配給文本字段,使其為非零值:
[cell.contentView addSubview:[self displayTextfield:indexPath.row + 1]];
最后,在訪問textfield文本屬性之前,請確保它實際上是一個文本字段並且該視圖存在:
NSString * textFieldText = nil;
UIView * view = [cell.contentView viewWithTag:index];
if(view && [view isKindOfClass:[UITextField class]]) {
UITextField * textField = (UITextField *)view;
textFieldText = [textField text];
}
if(textFieldText) {
// Use text here...
}
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