ios - 如何将数据转换成小端格式？

Question

var val = 1240;

转换成little endian formate swift 3

例如:1500 (0x5DC) 到 0xDC050000

Answer 1

let value = UInt16(bigEndian: 1500)

print(String(format:"%04X", value.bigEndian)) //05DC
print(String(format:"%04X", value.littleEndian)) //DC05

确保您实际使用的是 bigEndian 初始化程序。

对于 32 位整数:

let value = UInt32(bigEndian: 1500)

print(String(format:"%08X", value.bigEndian)) //000005DC
print(String(format:"%08X", value.littleEndian)) //DC050000