使用scrollView的一个子视图对contentSize进行调整
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_scroll_Bg = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 100, SCREEN_W, 200)]; _scroll_Bg.pagingEnabled = YES; _scroll_Bg.delegate = self; _scroll_Bg.backgroundColor = [UIColor redColor]; [self.view addSubview:_scroll_Bg]; |
1，现在scrollView添加一个主要子视图，大小贴合scrollView
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UIView *bgView = [[UIView alloc] init]; bgView.backgroundColor = [UIColor blueColor]; [_scroll_Bg addSubview:bgView]; [bgView mas_makeConstraints:^(MASConstraintMaker *make) { make.top.left.bottom.and.right.equalTo(_scroll_Bg).with.insets(UIEdgeInsetsZero); make.width.equalTo(_scroll_Bg); }]; |
2，此后所有子视图都需添加在此bgView上
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UIView *childV = [[UIView alloc] init]; childV.backgroundColor = [UIColor cyanColor]; [bgView addSubview:childV]; [childV mas_makeConstraints:^(MASConstraintMaker *make) { make.left.right.mas_equalTo(0); make.top.mas_equalTo(250); make.height.mas_equalTo(1000); }]; |
3，以最后所加子视图为准，再对bgView进行重新约束
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[bgView mas_makeConstraints:^(MASConstraintMaker *make) { make.bottom.equalTo(childV.mas_bottom); }]; |
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