1.UIScrollview与Autolayout
make.bottom.mas_equalTo(self.contentScrollView); 主要是要计算出contentsize。
UIView *bannerView=[[UIView alloc] init];
[self.contentScrollView addSubview:bannerView];
[bannerView mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(self.contentScrollView);
make.top.mas_equalTo(NAVBAR_HIGHT);
make.width.mas_equalTo(self.contentScrollView);
make.height.mas_equalTo(1000);
make.bottom.mas_equalTo(self.contentScrollView); //这个
}];
