I do not believe in a pretrib Rapture of the Church as it is found nowhere in scripture no matter how all these pretrib preachers try to make scripture line up with what they try to preach.
John was the Apostle to the Church in Ephesus where he lived and wrote four epistles, John, First, Second and Third John. He was exiled to the isle of Patmos by the Roman Emperor Domitian for preaching the word of God in the Roman province of Asia where the seven Churches were located. It is said that John was in his nineties when he was exiled and probably released around 97 AD after Domitian died. John was born around 6 AD and died around 100 AD.
John was in the Spirit (being in the Spirit means being in the presence of Gods Spirit that makes the flesh to weak to stand, John 18:6) on the Lords day that was a chosen day of God in his timing and purpose to reveal these revelations to John. He was not literally taken up to heaven, John 3:13, but only in the Spirit.
Rev 1:1:8 John first heard a great voice as a trumpet as the voice was very distinct to him like that of hearing a trumpet sound in all its great power and authority. John heard the voice saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send it unto the seven churches which are in Asia; unto Ephesus, and unto Smyrna, and unto Pergamos, and unto Thyatira, and unto Sardis, and unto Philadelphia, and unto Laodicea.
Ephesus would be the nearest Church to this isle and as supply ships came in someone from the Church would come and take parts of these letters and hide them on their person and take them back to the Church of Ephesus as they were dispersed between all seven Churches.