Question

我在FYImageSequence.m文件中有这两个函数。我从UIImageView继承了这个类

@interface FVImageSequence : UIImageView

我能够在故事板中将它连接到我的UIImageView。但是如何使下面的功能工作。是否有任何连接应该完成。

-(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的用户互动默认为否。所以你需要像这样是

self.userInteractionEnabled = YES;

Answer 2

在图片视图上将UserInteractionEnabled设置为YES。

Answer 3

为此，我不得不使用方法，而不是变量（不知何时变量不能直接访问），所以：
[self setUserInteractionEnabled：YES];

Touchesbegan和touchesmoved函数无法在UIImageView上运行

3 个答案: