以编程方式创建移动uiimageview [英] Moving uiimageview created programmatically

问题描述

我编写了以下代码但它不起作用。图片出现但我无法移动

I wrote the following code and it does not work. Picture appears but I can not move it

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;
    }}

我添加了一张图片来查看并编写以下代码

I added a picture to view and wrote the following code

.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uiimageview以编程方式创建？

And it works! How can I make so that programmatically created by uiimageview could move?

NSMUTABLEARRAY

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;
        }
    }
}

推荐答案

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

Initialize your UIImageView like the following code and then it will work like your second example:

ViewController.h

ViewController.h

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

ViewController.m

ViewController.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;
    }
}

这篇关于以编程方式创建移动uiimageview的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！