CGRectMake & CGSizeMake

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CGRectMake
Returns a rectangle with the specified coordinate and size values.

Declaration
SWIFT
func CGRectMake(_ x: CGFloat,
              _ y: CGFloat,
              _ width: CGFloat,
              _ height: CGFloat) -> CGRect
OBJECTIVE-C
CGRect CGRectMake ( CGFloat x, CGFloat y, CGFloat width, CGFloat height );
Parameters
x   
The x-coordinate of the rectangle’s origin point.
y   
The y-coordinate of the rectangle’s origin point.
width   
The width of the rectangle.
height   
The height of the rectangle.
Return Value
A rectangle with the specified location and dimensions.

Import Statement
OBJECTIVE-C
@import CoreGraphics;
SWIFT
import CoreGraphics

coordinate坐标的意思；rectangle矩形的意思；

CGSizeMake
Returns a size with the specified dimension values.

Declaration
SWIFT
func CGSizeMake(_ width: CGFloat,
              _ height: CGFloat) -> CGSize
OBJECTIVE-C
CGSize CGSizeMake ( CGFloat width, CGFloat height );
Parameters
width   
A width value.
height   
A height value.
Return Value
Returns a CGSize structure with the specified width and height.

Import Statement
OBJECTIVE-C
@import CoreGraphics;
SWIFT
import CoreGraphics

CGRectMake & CGSizeMake

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原文地址：http://www.cnblogs.com/wenios/p/4809120.html