Content in IOS Uiscrollview is not displayed

In the afternoon to find a xib page in 4s, and then began to add scroll bar, words are also the first addition, a variety of unskilled, the results of the addition of the found content is not displayed, and then a variety of data for various testing, I finally found that I set the transparency of the view as content in Uiscrollview to 0.

Why set it to 0? Because adding controls to the content when added to see the missing, thought is obscured, so the conten of the transparency set to 0, in fact, is not obscured, because in the ScrollView Conten only set the margin constraints, his size becomes 0, After setting the size, forget about the transparency.

TMD has been looking for the reason from afternoon to night 8 o'clock.

The various pits in software development are hereby documented. God pit.

Content in IOS Uiscrollview is not displayed