選擇文本字段時生成UITableView滾動框經(jīng)過多次嘗試和錯誤之后，我放棄了并問了這個問題。我見過很多人都有類似的問題，但無法找到正確的答案。我有一個UITableView由自定義單元格組成。單元格由相鄰的5個文本字段組成(有點像網(wǎng)格)。當(dāng)我試圖滾動和編輯底部的單元格時，UITableView，我無法使我的細(xì)胞正確地定位在鍵盤上方。我見過很多關(guān)于改變視野大小等問題的答案.但到目前為止，他們中沒有一個人工作得很好。有誰能用一個具體的代碼示例來澄清做這件事的“正確”方法嗎？
3 回答
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TA貢獻(xiàn)1883條經(jīng)驗 獲得超3個贊
- (void) textFieldDidBeginEditing:(UITextField *)textField {
UITableViewCell *cell;
if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_6_1) {
// Load resources for iOS 6.1 or earlier
cell = (UITableViewCell *) textField.superview.superview;
} else {
// Load resources for iOS 7 or later
cell = (UITableViewCell *) textField.superview.superview.superview;
// TextField -> UITableVieCellContentView -> (in iOS 7!)ScrollView -> Cell!
}
[tView scrollToRowAtIndexPath:[tView indexPathForCell:cell] atScrollPosition:UITableViewScrollPositionTop animated:YES];}
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TA貢獻(xiàn)1816條經(jīng)驗 獲得超4個贊
@interface MyUIViewController: UIViewController <UITableViewDelegate, UITableViewDataSource>{
UITableView *myTableView;
UITextField *actifText;}@property (nonatomic, retain) IBOutlet UITableView *myTableView;@property (nonatomic, retain) IBOutlet UITextField *actifText;- (IBAction)textFieldDidBeginEditing:(UITextField *)textField;- (IBAction)textFieldDidEndEditing:(UITextField *)textField;-(void) keyboardWillHide:(NSNotification *)note;-(void) keyboardWillShow:(NSNotification *)note;@end@implementation MyUIViewController@synthesize myTableView;@synthesize actifText;- (void)viewDidLoad
{
// Register notification when the keyboard will be show
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification
object:nil];
// Register notification when the keyboard will be hide
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification
object:nil];}// To be link with your TextField event "Editing Did Begin"// memoryze the current TextField- (IBAction)textFieldDidBeginEditing:(UITextField *)textField{
self.actifText = textField;}// To be link with your TextField event "Editing Did End"// release current TextField- (IBAction)textFieldDidEndEditing:(UITextField *)textField{
self.actifText = nil;}-(void) keyboardWillShow:(NSNotification *)note{
// Get the keyboard size
CGRect keyboardBounds;
[[note.userInfo valueForKey:UIKeyboardFrameBeginUserInfoKey] getValue: &keyboardBounds];
// Detect orientation
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
CGRect frame = self.myTableView.frame;
// Start animation
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:0.3f];
// Reduce size of the Table view
if (orientation == UIInterfaceOrientationPortrait || orientation == UIInterfaceOrientationPortraitUpsideDown)
frame.size.height -= keyboardBounds.size.height;
else
frame.size.height -= keyboardBounds.size.width;
// Apply new size of table view
self.myTableView.frame = frame;
// Scroll the table view to see the TextField just above the keyboard
if (self.actifText)
{
CGRect textFieldRect = [self.myTableView convertRect:self.actifText.bounds fromView:self.actifText];
[self.myTableView scrollRectToVisible:textFieldRect animated:NO];
}
[UIView commitAnimations];}-(void) keyboardWillHide:(NSNotification *)note{
// Get the keyboard size
CGRect keyboardBounds;
[[note.userInfo valueForKey:UIKeyboardFrameBeginUserInfoKey] getValue: &keyboardBounds];
// Detect orientation
UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
CGRect frame = self.myTableView.frame;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDuration:0.3f];
// Increase size of the Table view
if (orientation == UIInterfaceOrientationPortrait || orientation == UIInterfaceOrientationPortraitUpsideDown)
frame.size.height += keyboardBounds.size.height;
else
frame.size.height += keyboardBounds.size.width;
// Apply new size of table view
self.myTableView.frame = frame;
[UIView commitAnimations];}@endSWIFT 1.2+版本：
class ViewController: UIViewController, UITextFieldDelegate {
@IBOutlet weak var activeText: UITextField!
@IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
NSNotificationCenter.defaultCenter().addObserver(self,
selector: Selector("keyboardWillShow:"),
name: UIKeyboardWillShowNotification,
object: nil)
NSNotificationCenter.defaultCenter().addObserver(self,
selector: Selector("keyboardWillHide:"),
name: UIKeyboardWillHideNotification,
object: nil)
}
func textFieldDidBeginEditing(textField: UITextField) {
activeText = textField }
func textFieldDidEndEditing(textField: UITextField) {
activeText = nil
}
func keyboardWillShow(note: NSNotification) {
if let keyboardSize = (note.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
var frame = tableView.frame UIView.beginAnimations(nil, context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(0.3)
frame.size.height -= keyboardSize.height
tableView.frame = frame if activeText != nil {
let rect = tableView.convertRect(activeText.bounds, fromView: activeText)
tableView.scrollRectToVisible(rect, animated: false)
}
UIView.commitAnimations()
}
}
func keyboardWillHide(note: NSNotification) {
if let keyboardSize = (note.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
var frame = tableView.frame UIView.beginAnimations(nil, context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(0.3)
frame.size.height += keyboardSize.height
tableView.frame = frame UIView.commitAnimations()
}
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