Paste_Image.png
Leading 左边距
Trailing 右边距一样
Leading Space to Container Margin 距离其左边界
Trailing Space to Container Margin 距离其右边界
Top Space to Top Layout Guide 距离其上边界
Buttom Space to Buttom Layout Guide 距离其下边界
Center Horizontally in Container 居视图中部(水平左右居中对齐)
Center Vertically in Container 居视图上下居中(垂直居中对齐)
下图为:Label的"左侧"居视图中部(不是Label居视图中部)
D391EBCFB147CA906E34818A2234CE58.gif
