在UITextView中成功滑動？

Question

有沒有人能夠在UITableView上實現成功的滑動手勢？默認情況下，由於控件的滾動特性，這是不可能的。我已經嘗試了繼承UITextView並在實例方法中實現滑動功能，但沒有使用骰子。

我的UITextView已禁用滾動 - 除非有另一種方法來實現多行文本？

[編輯]我想說的是輸入多行文本[/編輯]

Answer 1

這裏是一個UITextView，將檢測刷卡手勢的子類...

這是你在找什麼？

#import <UIKit/UIKit.h> 

#define kMinimumGestureLength 25 
#define kMaximumVariance  5 

@interface SwipeableTextView : UITextView { 
    CGPoint gestureStartPoint; 
} 

@end 

@implementation SwipeableTextView 

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { 
    [super touchesBegan:touches withEvent:event]; 

    UITouch *touch =[touches anyObject]; 
    gestureStartPoint = [touch locationInView:self]; 

} 
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { 
    [super touchesMoved:touches withEvent:event]; 

    UITouch *touch = [touches anyObject]; 
    CGPoint currentPosition = [touch locationInView:self]; 

    CGFloat deltaX = fabsf(gestureStartPoint.x - currentPosition.x); 
    CGFloat deltaY = fabsf(gestureStartPoint.y - currentPosition.y); 

    if (deltaX >= kMinimumGestureLength && deltaY <= kMaximumVariance) { 
     NSLog(@"Horizontal swipe detected"); 
    } 

} 

@end 

Answer 2

通常你在UITableViewCell中實現觸摸響應事件，它可以識別滑動並執行某些操作。 UITableViews繼承自UIScrollView，它不喜歡觸摸事件被重寫。

Answer 3

您也可以使用雙指輕掃。我回到家時，我可以用一些代碼闡述，但是，這是我所使用

Answer 4

在UITextView的頂部添加透明UIView，並用它來處理輕掃，併發送touchesBegan/Moved/Ended/Canceled:消息文本視圖保持正常相互作用。

Answer 5

我拿了羅斯的代碼，並添加了一些幫助我的東西。特別是，這段代碼在停止之前不會響應滑動。它還可以防止在中途翻轉方向。

#import <UIKit/UIKit.h> 

#define kMinimumGestureLength 25 
#define kMaximumVariance  5 

typedef enum swipeDirection { 
    kSwipeNone, 
    kSwipeLeft, 
    kSwipeRight 
} tSwipeDirection; 

@interface SwipeableTextView : UITextView { 
    CGPoint gestureStartPoint; 
    tSwipeDirection swipeDirection; 
} 

@end 

@implementation SwipeableTextView 

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { 
    [super touchesBegan:touches withEvent:event]; 

    swipeDirection = kSwipeNone; 
    UITouch *touch =[touches anyObject]; 
    gestureStartPoint = [touch locationInView:self]; 

} 
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { 
    [super touchesMoved:touches withEvent:event]; 

    UITouch *touch = [touches anyObject]; 
    CGPoint currentPosition = [touch locationInView:self]; 

    CGFloat deltaX = fabsf(gestureStartPoint.x - currentPosition.x); 
    CGFloat deltaY = fabsf(gestureStartPoint.y - currentPosition.y); 

    // Check if we already started a swipe in a particular direction 
    // Don't let the user reverse once they get going 
    if (deltaX >= kMinimumGestureLength && deltaY <= kMaximumVariance && 
     swipeDirection == kSwipeNone) { 
     if (gestureStartPoint.x < currentPosition.x) { 
      swipeDirection = kSwipeRight; 
     } 
     else { 
      swipeDirection = kSwipeLeft; 
     } 
    } 
} 

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { 
    if (swipeDirection == kSwipeRight) { 
     NSLog(@"Swipe right"); 
    } 
    else if (swipeDirection == kSwipeLeft) { 
     NSLog(@"Swipe left"); 
    } 
    [super touchesEnded:touches withEvent:event]; 
} 

@end 

Answer 6

一個更好的解決辦法，我已經找到了，就是簡單地通過觸摸回到上海華：

@interface SwipeableTextView : UITextView { 
} 

@end 

@implementation SwipeableTextView 

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { 
    [super touchesBegan:touches withEvent:event]; 

    [self.superview touchesBegan:touches withEvent:event]; 

} 
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { 
    [super touchesMoved:touches withEvent:event]; 

    [self.superview touchesMoved:touches withEvent:event]; 
} 

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { 
    [super touchesEnded:touches withEvent:event]; 

    [self.superview touchesEnded:touches withEvent:event]; 
} 

@end