2014-11-08
因为需要，我在做一个这样的效果，利用一个UIScrollView里面添加一些UIImageView,然后希望点击ImageView做到点击效果，或者去重写touch事件做一些事，类似代码如下：
- (IBAction)selectBut:(id)sender
{
scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(x, y, w, h)];
scrollView.userInteractionEnabled = YES;
int y = 0;
for (int i = 0; i < [myArray count]; i++) {
UIImageView *image = [[UIImageView alloc] initWithFrame:CGRectMake(0, y, 75, 30)];
image.userInteractionEnabled = YES;
y = y + 35;
[scrollView addSubview:image];
}
[self.view addSubview:scrollView];
[scrollView setContentSize:CGSizeMake(150, 300)]
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
if ([touch tapCount] == 1) {
NSLog(@"One touch !!");
}
}
这里我已经给ImageView的userInteractionEnabled设置为YES了(UIImageView的userInteractionEnabled默认为NO)，但是，无论我怎么做 最后touch事件还是无法响应，原因如下：Subviews of UIScrollview will never call touchesBegan method directly. You need to customized with subview to get touchesBegan properties of that added subview/customized view.
@interface CustomImageView : UIImageView
{
}
@implementation CustomImageView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
}
return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
NSLog(@"%s", __FUNCTION__);
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
if ([touch tapCount] == 2) {
drawImageView.image = nil;
return;
}
}