[英]UITableView inside UITableViewCell not receiving touch events
[英]How to handle events (Touch Up Inside/Outside) for UItableViewCell with a text field?
我有一個自定義UITableViewCell,其中有一個文本字段。 我已經使用IB創建了它,並且有一個自定義類。
現在,我的問題是我想設置文本字段,以便在輸入文本期間,如果用戶在文本字段之外單擊(而不點擊鍵盤上的回車/完成鍵),則該字段會辭退第一響應者。 我了解,我需要處理Touch Up Inside事件。 但是,即使我已完成連接,我的tableview類也從未收到此事件。 我假設它是因為它不是UIcontrol的子類,因為它必須是UITableViewCel,所以我不能做到這一點。
那么解決方案是什么? 我如何接收這些事件?
頭文件:
#import <UIKit/UIKit.h>
@interface MMSingleTextFieldCell : UITableViewCell <UITextFieldDelegate>
// Properties
@property (weak, nonatomic) IBOutlet UITextField *singleTextField;
// Methods
- (IBAction)eventTouchUpOutside:(id)sender;
- (IBAction)eventTouchUpInside:(id)sender;
@end
類文件:
#import "MMSingleTextFieldCell.h"
@implementation MMSingleTextFieldCell
@synthesize singleTextField;
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
// Initialization code
}
return self;
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
[super setSelected:selected animated:animated];
// Configure the view for the selected state
}
- (IBAction)eventTouchUpOutside:(id)sender {
[singleTextField resignFirstResponder];
}
- (IBAction)eventTouchUpInside:(id)sender {
[singleTextField resignFirstResponder];
}
我最近剛剛在Github上開源了一個項目,該項目應該使這一切相對容易實現。 它包括一個可以輕松插入單元格的類和一個演示其功能的示例項目。
如果查看RootTableViewController的viewDidLoadMethod
您將看到我正在添加一個手勢識別器:
self.tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self
action:@selector(dismissKeyboard)];
_tapGestureRecognizer.delegate = self;
_tapGestureRecognizer.cancelsTouchesInView = NO;
[self.tableView addGestureRecognizer:_tapGestureRecognizer];
添加關閉鍵盤方法:
- (void)dismissKeyboard {
[_textField resignFirstResponder];
}
添加一個手勢識別器回調(在RootTableViewController中):
//see: http://stackoverflow.com/questions/7195661/why-is-uigesturerecognizer-being-called-on-my-textfield-clear-button
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
if([touch.view isKindOfClass:[UITextField class]] ||
[touch.view isKindOfClass:[UIButton class]])
{
return NO;
}
return YES;
}
當然,這意味着您必須使RootTableViewController遵守UIGestureRecognizerDelegate協議(在頭文件中):
@interface RootTableViewController : UITableViewController<SATextFieldDelegate, UIGestureRecognizerDelegate>
如果希望用戶滾動表視圖並關閉鍵盤,請執行以下表視圖委托回調:
- (void)scrollViewWillBeginDragging:(UIScrollView *)activeScrollView {
if (_textField.isFirstResponder) {
[self dismissKeyboard];
}
}
我相信這是您想要的功能。
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
if (_textField.isFirstResponder) {
[self dismissKeyboard];
}
}
嘗試這個:
1)實現UIGestureRecognizerDelegate協議
2)以viewDidLoad為例,創建以下內容
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(hideKeyboard:)];
tap.delegate = self;
[self.view addGestureRecognizer:tap];
3)現在,從1開始從協議實施方法
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
// Use this for allow some control to receive his natural tap event. You can use tap.cancelsTouchesInView = NO; in the 2 step instead of this, try both of then and choose on your own.
if (touch.view == <some control>) {
//NSLog(@"NO");
return NO;
}
//NSLog(@"YES");
return YES;
}
4)最后,實現tap的回調
-(void) hideKeyboard:(id)sender{
if (<your edit text>.isEditing) {
[<your edit text> resignFirstResponder];
}
}
我希望這會有所幫助,或者至少會為您指明正確的方向
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