摘要：
Debugging in Code 有两个调试layout问题的阶段。1. Map from “this view is in the wrong place” to “this constraint (or these constraints) is (are) incorrect.” 2. Ma... 阅读全文
摘要：
Working with Auto Layout Programmatically 如果你在运行阶段添加或者移除views你就需要通过代码来添加约束来保证你的interface能正确适应size或者orientation的改变。Creating Constraints Programmaticall... 阅读全文