Cocoa与Cocoa Touch的几个对应关系
2011-07-01- NSView - UIView
- NSButton - UIButton
- NSTextField - UITextField
- NSRect - CGRect
- NSSize - CGSize
NSZeroRect - CGRectZero
CGColorCreateGenericRGB -UIColor colorWithRed:green:blue:alpha:
- NSValueBinding -n/a bindings with view objects not supported
- NSMenuItem -n/a (menus not supported
- NSGraphicsContext -CGContext
NSLeftArrowFunctionKey -n/a (iOS does not have a keyboard)
NSCompositeSourceOver - kCGBlendModeNormal (which is the default blend mode in a CGContext)