如何在iPhone中调用触摸事件上的图像
我创建了一个应用程序，其中有 2 个图像视图，并且我在图像视图上添加了图像。我不知道当我单击图像时，应该选择图像并且该值应该保存在 sqlite 数据库中。因此，我创建了触摸方法，并为两个图像添加了标志，因此当选择特定图像时，它可以通过其标志来识别。 这是我的代码：
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location= [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location))
{
//set some flag like
select=1;
}
else if(CGRectContainsPoint(secImage.frame, location))
{
select=2;
}
[mComment resignFirstResponder];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location)) {
if(select==1) {
var=1;
}
else if(CGRectContainsPoint(secImage.frame, location)) {
if(select==2) {
vars=2;
}
select=0;
}
}
}
但是我遇到了问题，当我选择第一个图像时，它正确地进入 if 部分并将值 1 存储到 var 1 中，但是当我单击 secimage 时，它不会进入 elseif 部分，它只是从循环。可能是什么问题。请帮我解决这个问题。谢谢
i have created an application in which there are 2 imageviews and i have added image on image view.i wnt that when i click on my image the image should get selected and the value should be saved in sqlite database.So for that i have created touches method,and added flags for both the images so when particular image is selected it is identified by its flag.
this is my code:
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location= [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location))
{
//set some flag like
select=1;
}
else if(CGRectContainsPoint(secImage.frame, location))
{
select=2;
}
[mComment resignFirstResponder];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:self.view];
if(CGRectContainsPoint(firstImage.frame, location)) {
if(select==1) {
var=1;
}
else if(CGRectContainsPoint(secImage.frame, location)) {
if(select==2) {
vars=2;
}
select=0;
}
}
}
But i am having a problem,when i select my first image it properly gets into the if part and stores value 1 into var 1 but when i click secimage it does not enter into elseif part,it just comes out of the loop.What may be the problem .Please help me in solving this problem.thanks
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以下更改应该可以解决问题：
您的上述代码无法正常工作，因为
if(CGRectContainsPoint(firstImage.frame, location) == YES，它永远不会到达if(CGRectContainsPoint( secImage.frame, location)代码也可以清理一下。不确定这是实现这两种方法的理想方法，但无论如何它都可以工作。
The following change should fix the problem:
Your above code wasn't working because
if(CGRectContainsPoint(firstImage.frame, location) == YES, it will never reach the lineif(CGRectContainsPoint(secImage.frame, location)The code could also be cleaned up a bit. Not sure this is the ideal way of implementing these two methods, but it could work anyway.
可能是你的代码有错误？试试这个
May be your code has a mistake? Try this