こっちよりも
var arr = ["a","b","c","d","e"]
// var displayString = ""
for i in 0..<arr.count{
// displayString = displayString + "\n" + arr[i]
textView.text = textView.text + "\n" + arr[i]
print(i)
}
// textView.text = displayString
こっちの方が早
var arr = ["a","b","c","d","e"]
var displayString = ""
for i in 0..<arr.count{
displayString = displayString + "\n" + arr[i]
// textView.text = textView.text + "\n" + arr[i]
print(i)
}
textView.text = displayString
配列の数が多くなるほど差は顕著になる。