如何通过Objective-C的枚举学习iOS中位操作.md详解

let initialBits: UInt8 = 0b00001111
let invertedBits = ~initialBits // equals 11110000

let targetNum = 5 // 101
let targetNum2 = 6 // 110
print(targetNum | targetNum2) //print 7
//targetNum: 101
//targetNum2: 110
//result:  111 (十进制 7)

let targetNum = 5 // 101
let targetNum2 = 6 // 110
print(targetNum & targetNum2) //print 4
//targetNum: 101
//targetNum2: 110
//result:  100 (十进制 4)

let targetNum = 5 // 101
let targetNum2 = 6 // 110
print(targetNum ^ targetNum2) //print 3
//targetNum: 101
//targetNum2: 110
//result:  011 (十进制 3)

let targetNum = 5 // 101
print(targetNum >> 2) //print 1
//targetNum: 101
//右移2位
//result:  1 (十进制 1)

let targetNum = 5 // 101
print(targetNum << 2) //print 20
//targetNum: 101
//左移2位
//result:  10100 (十进制 20)

typedef NS_OPTIONS(NSInteger, CellExLineType) {
 CellExLineTypeTopLong  = 0, 
 CellExLineTypeTopNone  = 1 << 0, //十进制 1
 CellExLineTypeBottomLong = 1 << 1, //十进制 2
 CellExLineTypeBottomNone = 1 << 2, //十进制 4
};

struct CellExLineType: OptionSet {
 let rawValue: Int
 
 static let topLong = CellExLineType(rawValue: 0)
 static let topNone = CellExLineType(rawValue: 1 << 0)
 static let bottomLong = CellExLineType(rawValue: 1 << 1)
 static let bottomNone = CellExLineType(rawValue: 1 << 2)
}

//OC
self.lineType = CellExLineTypeTopNone;
self.lineType |= CellExLineTypeBottomNone;
self.lineType = self.lineType & ~CellExLineTypeTopNone; //self.lineTye 只包含CellExLineTypeBottomNone
//Swift
var lineType: CellExLineType = [.topNone, .bottomNone]
lineType.remove(.topNone)

//OC
self.lineType = CellExLineTypeTopNone; //self.lineType 包含CellExLineTypeTopNone
self.lineType = self.lineType | CellExLineTypeBottomNone; //self.lineType 包含CellExLineTypeTopNone和CellExLineTypeBottomNone
//Swift
var lineType: CellExLineType = [.bottomNone]
lineType.insert(.topNone)

//OC
if ((self.lineType & CellExLineTypeTopNone) == CellExLineTypeTopNone) {
 NSLog(@"包含CellExLineTypeTopNone");
}
//Swift
var lineType: CellExLineType = [.topNone, .bottomNone]
if lineType.contains(.bottomNone) {
 print("包含bottomNone")
}

//OC
self.lineType = CellExLineTypeTopNone | CellExLineTypeBottomNone; //self.lineType 包含CellExLineTypeTopNone和CellExLineTypeBottomNone
self.lineType = self.lineType ^ CellExLineTypeTopNone; //self.lineTye 只包含CellExLineTypeBottomNone
self.lineType = self.lineType ^ CellExLineTypeTopNone; //self.lineType 包含CellExLineTypeTopNone和CellExLineTypeBottomNone
//Swift
var lineType: CellExLineType = [.topNone, .bottomNone]
if lineType.contains(.topNone) {
 lineType.remove(.topNone)
} else {
 lineType.insert(.topNone)
}

//OC
- (void)setLineType:(CellExLineType)lineType {
 _lineType = lineType;
 if (lineType & CellExLineTypeTopNone) {
  NSLog(@"top none");
 }
 if (lineType & CellExLineTypeBottomNone) {
  NSLog(@"bottom none");
 }
}
//Swift
var lineType: CellExLineType = [.topNone, .bottomNone]
if lineType.contains(.topNone) {
 lineType.remove(.topNone)
}
if lineType.contains(.bottomNone) {
 
}