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在表视图中滑动一行,单击“其他”,选择“滑动”

swipe tableview ipad objective-c

Nick · 技术社区 · 14 年前

我所说的滑动是指将手指放在单元格的某个部分,然后将其拖动(左或右,无所谓),然后将其释放。这不会调用didselectrowatinexpath,因为它不是tap。

在A.1上滑动
轻触B.4
操作系统调用表View:didSelectRowAtIndexPath:A.1

我做错什么了吗?会出什么问题?

处理特定单元格中的接触的完整代码:

- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    RDLogString(@"(%p) Received touches began", self);
    moveCount = 0;
    UITouch * touch = [touches anyObject];
    touchBegin = [touch locationInView: nil];
    [[self nextResponder] touchesBegan: touches withEvent: event];
}

- (void) touchesMoved: (NSSet * const)touches withEvent:(UIEvent * const)event {
    RDLogString(@"(%p) Received touches moved", self);
    moveCount++;
    [[self nextResponder] touchesMoved: touches withEvent: event];
}

- (void) touchesEnded: (NSSet * const)touches withEvent:(UIEvent * const)event {
    RDLogString(@"(%p) Received touches ended", self);
    if(![self checkUserSwipedWithTouches: touches]){
        [[self nextResponder] touchesEnded: touches withEvent: event];
    }
}

- (BOOL) checkUserSwipedWithTouches: (NSSet * const) touches {
    CGPoint touchEnd = [[touches anyObject] locationInView: nil];
    NSInteger distance = touchBegin.x - touchEnd.x;

    // This code shows an animation if the user swiped
    if(distance > SWIPED_HORIZONTAL_THRESHOLD){
        [self userSwipedRightToLeft: YES];
        return YES;
    } else if (distance < (-SWIPED_HORIZONTAL_THRESHOLD)) {
        [self userSwipedRightToLeft: NO];
        return YES;
    }

    return NO;
}

1 回复 | 直到 14 年前

Nick 14 年前

我修复了它,当一个刷卡被检测和处理,而不是不发送任何东西,我现在发送一个touchesCancelled,这是很有意义的回顾,我必须承认,但它不是真的很清楚,我应该这样做。如果您不想处理该操作,我找不到适当的文档说明该怎么办。

有效代码:

- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    moveCount = 0;
    UITouch * touch = [touches anyObject];
    touchBegin = [touch locationInView: nil];
    [[self nextResponder] touchesBegan: touches withEvent: event];
}

- (void) touchesMoved: (NSSet * const)touches withEvent:(UIEvent * const)event {
    moveCount++;
    [[self nextResponder] touchesMoved: touches withEvent: event];
}

- (void) touchesEnded: (NSSet * const)touches withEvent:(UIEvent * const)event {
    // If we DO NOT handle the touch, send touchesEnded
    if(![self checkUserSwipedWithTouches: touches]){
        [[self nextResponder] touchesEnded: touches withEvent: event];
    } else { // If we DO handle the touch, send a touches cancelled. 
        self.selected = NO;
        self.highlighted = NO;
        [[self nextResponder] touchesCancelled: touches withEvent: event];
    }
}