Touchesbegan和touchesmoved函數無法在UIImageView上運行

Question

我在我的FYImageSequence.m文件中有這兩個函數。我從UIImageView繼承了這個類

@interface FVImageSequence : UIImageView

我能夠在故事板中將它連接到我的UIImageView。但是如何使下面的功能工作。是否有任何連接應該完成。

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
if(increment == 0)
    increment = 1;
    [super touchesBegan:touches withEvent:event];

    UITouch *touch = [[event allTouches] anyObject];
    CGPoint touchLocation = [touch locationInView:self];
    previous = touchLocation.x;
}

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

    UITouch *touch = [[event allTouches] anyObject];
    CGPoint touchLocation = [touch locationInView:self];
int location = touchLocation.x;

if(location < previous)
    current += increment;
else
    current -= increment;

previous = location;

if(current > numberOfImages)
    current = 0;
if(current < 0)
    current = numberOfImages;

NSString *path = [NSString stringWithFormat:@"%@%d", prefix, current];
NSLog(@"%@", path);

path = [[NSBundle mainBundle] pathForResource:path ofType:extension];


UIImage *img =  [[UIImage alloc] initWithContentsOfFile:path];

[self setImage:img];
}

Answer 1

UIImageView用戶交互默認為NO 。 所以你需要這樣做

self.userInteractionEnabled = YES;

Answer 2

在圖像視圖上將UserInteractionEnabled設置為YES 。

Answer 3

為此，我不得不使用該方法，而不是變量（不知何故變量不能直接訪問），所以：
[self setUserInteractionEnabled：YES];