1

我写了以下代码，但它不起作用。图片出现了，但我不能移动它

UIImageView *oneselement = [[UIImageView alloc] initWithFrame:self.view.frame];
oneselement = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"1el.png"]];
oneselement.frame = CGRectMake(0, 0, 122, 122);
[self.view addSubview:oneselement];


-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [[event allTouches] anyObject];

    if([touch view]==oneselement)
    {
        CGPoint location = [touch locationInView:self.view];
        oneselement.center=location;
    }}

我添加了一张图片查看并写了以下代码

。H

@interface ViewController : UIViewController
{
    IBOutlet UIImageView *oneEl;
}
@property (nonatomic,retain) IBOutlet UIImageView *oneEl;

.m

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
    if([touch view]==oneEl)
    {
        CGPoint location = [touch locationInView:self.view];
        oneEl.center=location;
    }
}

它有效！我怎样才能使由 uiimageview 以编程方式创建的可以移动？

NSMUTABLE数组

self.elements=[myElements getElements];

imagesElements = [[NSMutableArray alloc]init];
for(ElemetsList *item in self.elements)
{
        UIImageView *oneelement = [[UIImageView alloc] initWithImage:[UIImage imageNamed:item.imgElement]];
        oneelement.frame = CGRectMake(item.positionX, item.positionY, item.width, item.height);
        oneelement.userInteractionEnabled=YES;
        [imagesElements addObject:oneelement];
}

for(UIImageView *img in imagesElements) 
    [self.view addSubview:img];

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [[event allTouches] anyObject];

    for(UIImageView *img in imagesElements) 
    {  
        if([self view] == img)
        {
            CGPoint location = [touch locationInView:self.view];
            img.center=location;
        }
    }
}
4

2 回答 2

3

像下面的代码一样初始化你的 UIImageView ，然后它将像你的第二个例子一样工作：

视图控制器.h

@interface ViewController : UIViewController
{
    UIImageView *oneselement;
}
@property (nonatomic,retain) UIImageView *oneselement;

视图控制器.m

//initialize your UIImageView
UIImageView *newOneselement = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"1el.png"]];
self.oneselement = newOneselement;
self.oneselement.userInteractionEnabled = YES;
self.oneselement.frame = CGRectMake(0, 0, 122, 122);
[self.view addSubview:self.oneselement];
[newOneselement release];

//Handle touchesMoved
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *touch = [[event allTouches] anyObject];
    if([touch view]==self.oneselement)
    {
        CGPoint location = [touch locationInView:self.view];
        self.oneselement.center=location;
    }
}
于 2012-07-18T12:19:49.377 回答
0

请看这个链接。
您也可以尝试：

为了移动图像，您应该将要移动的代码包含在动画块中：

[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
tapImage.center = CGPointMake(156, 110);
[UIView commitAnimations];

您还可以使用 UIView setAnimationDidStopSelector: 方法创建一个在动画完成后执行的方法。

[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animateImages)];
tapImage.center = CGPointMake(156, 110);
[UIView commitAnimations];

//other stuff

-(void)animateImages{
     [tapImage startAnimating];
}
于 2012-07-18T12:25:39.303 回答