[_picPathStringsArray enumerateObjectsUsingBlock:^(NSString * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
long columnIndex = idx % perRowItemCount;
long rowIndex = idx / perRowItemCount;
UIImageView *imageView = [UIImageView new];
//加载网络图片
[imageView sd_setImageWithURL:[NSURL URLWithString:obj] placeholderImage:[UIImage imageNamed:@"placeholder.png"]];
//判断是多张图片还是一张图片
if (_picPathStringsArray.count > 1) {
imageView.frame = CGRectMake(columnIndex * (itemW + margin), rowIndex * (itemH + margin), itemW, itemH);
}else{
imageView.frame = CGRectMake(columnIndex * (itemW + margin), rowIndex * (itemH + margin), 100, 100);
}
[self addSubview:imageView];
imageView.userInteractionEnabled = YES;
imageView.tag = idx;
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapImageView:)];
[imageView addGestureRecognizer:tap];