请教内存问题

[Bretra]

for (int i = 0; i < lines; ++i) {
for (int j = 0; j < cols; ++j) {
FaceButton btn = [FaceButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(jitem+edgeDistance+jhMargin,iitem+(i+1)*vMargin,item,item);
[btn addTarget:self action:@selector(faceBtnClick:) forControlEvents:UIControlEventTouchUpInside];
[self.contentView addSubview:btn];
[array addObject:btn];
}
}

这样做不是要消耗很多内存吗？