xcode 移动以编程方式创建的 uiimageview
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Moving uiimageview created programmatically
提问by JinDeveloper
I wrote the following code and it does not work. Picture appears but I can not move it
我写了下面的代码，但它不起作用。图片出现但是我不能移动它
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;
}}
I added a picture to view and wrote the following code
我加了一张图片查看，写了如下代码
.h
。H
@interface ViewController : UIViewController
{
IBOutlet UIImageView *oneEl;
}
@property (nonatomic,retain) IBOutlet UIImageView *oneEl;
.m
.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;
}
}
And it works! How can I make so that programmatically created by uiimageview could move?
它有效！我怎样才能让 uiimageview 以编程方式创建的可以移动？
NSMUTABLEARRAY
可变数组
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;
}
}
}
回答by tikhop
Initialize your UIImageView like the following code and then it will work like your second example:
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：
ViewController.h
视图控制器.h
@interface ViewController : UIViewController
{
UIImageView *oneselement;
}
@property (nonatomic,retain) UIImageView *oneselement;
ViewController.m
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;
}
}
回答by Nitish
Please see thislink.
You can also try :
请看这个链接。
您也可以尝试：
In order to move an image, you should enclose the code to move in an animation block:
为了移动图像，您应该在动画块中包含要移动的代码：
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:0.5];
tapImage.center = CGPointMake(156, 110);
[UIView commitAnimations];
You can also create a method to execute upon completion of the animation with the UIView setAnimationDidStopSelector: method.
您还可以使用 UIView setAnimationDidStopSelector: 方法创建一个在动画完成时执行的方法。
[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];
}
