iOS collectionview 里有多个section 如何知道点击的是哪个section哪个row里的btn？

Question

collectionview 里有多个section 多个cell 如何知道点击的是哪个section里的哪个row里的button？？？？？？？

想选择button改变选中的button的颜色

Answer 1

The easiest way is to directly change the button color according to the button's tag, without looking for section, row.
UIButton btn = (UIButton )[self.view viewWithTag:564684];

Answer 2

Personally, I think using block is the cleanest and most elegant way

Answer 3

If you just want to change the color of the selected button, wouldn’t it be better to modify the sender directly? .

Answer 4

Add a tag to each button and get the sender.tag of the click event

Answer 5

Customize a UIButton and add attributes to the button, such as:

@property (nonatomic) NSInteger section; 
@property (nonatomic) NSInteger row;

Then assign value in cellForRowAtIndexPath: