网格视图图片的按钮问题

Question

有一个网格视图的图片，怎么为每个图片添加一个点击事件？

- (void)viewDidLoad
{
[super viewDidLoad];


int Columns = 3;
int Rows=5;

int space = 10;
int width = (self.view.frame.size.width-(Columns)*space)/Columns;
int height = width;
int x = space;
int y = space;  
UIScrollView *Scroll=[[UIScrollView alloc]initWithFrame:CGRectMake(x, y,self.view.frame.size.width, self.view.frame.size.height) ];
[Scroll setContentSize:CGSizeMake(Columns*(space+width)+space, Rows*(space+(self.view.frame.size.height-(Columns)*space)/Columns)+space)];
Scroll.backgroundColor=[UIColor yellowColor];
Scroll.showsVerticalScrollIndicator=YES;

for(int i=1 ;i<30;i++)
{
    j++;


    NSLog(@"j= %i",j);


    label=[[UILabel alloc]initWithFrame:CGRectMake(x,y,width,height)];
    label.backgroundColor=[UIColor blueColor];

    image= [[UIImageView alloc] initWithFrame:CGRectMake(x,y,width,height)];
    image.image = [UIImage imageNamed:
                   [NSString stringWithFormat:@"image%02ds.jpg", i+1]]; 



    [Scroll addSubview:label];

    if (i%Columns == 0) {
        y += space+height;
        x = space;
    } else {
        x+=space+width;
    }
    [Scroll addSubview:image];

}
[self.view addSubview:Scroll];


}

Answer 1

可以用UITapGestureRecognizer实现

UITapGestureRecognizer *tapRecognizer=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imageTapped:)];
imageView.tag=TAG; //Tag your imageview to identify in call back
[imageView addGestureRecognizer:tapRecognizer];
[tapRecognizer release];    //If not ARC

回调函数如下.

-(void)imageTapped:(UITapGestureRecognizer *)tapRecognizer
{
    if ([tapRecognizer.view isKindOfClass:[UIImageView class]]) {
        if (tapRecognizer.view.tag==TAG) { //Identify image view tag
            //Your code for image tap action
        }
    }
}