嗨我正在获取18k的编码字符串头。所以我想减小尺寸。我正在以nsdata的形式压缩它。压缩后我将这个数据转换成字符串。获取形式 H4sIAAAAAAAAA9VU207rOBT9Fz / wVNPcL5XQqIXSU2igAwcoMxohx95p04sdbKccqPLvY5fC0KPz0Jm3iZQo9vZa9l57eW8Qg3VJ4XtJF6BRB01HRZjPIiISfpsNqj7l2ZuT1ZhcP2fZnbu + vryanPdc6T / dnF91g2D07XqI + / ++ Fy8UiuYPxU69GwdLOzLvMqdXmdVpOzV3 + zotskC2CcYqTP1a9Rfiw6P2 + UjgKeXEzeYieovvk7cLp5WO1vpCD2ItSPiDuxTmr pcDUmQv8Pr4Oi9On0dXS55xdX / n6dMhFGoCg1vMIB6PJ56Yzx8GqIWIUoKWRAM72 + amUOfPDSqZyS4gcRo6xMOu51McxEWIE0gIdtLQTWPXc0zQMtR69l0sgBuIE + cRuC7DXp5HOKBhgBM3ibALFKBw3NilCWr + aiH9WoFZX0kxB6oNy + 5vaDf23Cj00yDGru8zHIQuwSkjBU5Y4iVh4UVeGBuIAlpLOBVcA9cjWMPSYEf9Qff0cUto8oGXIS8E6mwQcJIvwbAXZKmgeT + 2wZWU6FJwu4RU1YjUnM5uyykf8v4eooUkULFaAWfAhmbLqSRayMNlKj8xym4W5k4YJYWDSZgWOPCIj5PUMyQUksDPQ + bEvl23rcRBi1uISjCF7FIqaq7vpJVjpnWlOu025QDHVJjDc6I0K6elJkszsWqbdxcAfTx99toSpqXScivLuZArQ1wIORV6bLzyIiT7z8zVjqD9zof2NL0HqbaFQJ4JrN9HW6k8 + 1nvhRVIa9ZvQulDjvIPYkz0zCDau2G7e9Zr339h7BpX3N2MDsrvJ46mMa46yAydf3fBfimS
这没有给出正确的答案。请有人帮忙。