獲取Size
view.frame.size
width
view.frame.size.width
height
view.frame.size.height
x
self.view.frame.origin.x
y
self.view.frame.origin.y
left
self.view.frame.origin.x
right
self.view.frame.origin.x + view.frame.size.width
top
self.view.frame.origin.y
bottom
self.view.frame.origin.y + view.frame.size.height
frame是當(dāng)前視圖的位置和大小，每個(gè)UIView必須設(shè)置搂蜓。以屏幕左上角為圓點(diǎn)狼荞，水平向右X軸，垂直向下為Y軸帮碰。
bounds是相對(duì)于當(dāng)前視圖為圓點(diǎn)相味，bounds大小即是view的大小
