collectionView關於點擊事件

-(void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)i ...

clang: error: linker command failed with exit code 1 (use -v to see invocation)

clang: error: linker command failed with exit code 1 (use -v to see invocation) 解決辦法 : 重新導入下 ...