Fix multiline placeholder #102

Author: muukii

NextGrowingTextView-Demo/Book.swift

@@ -51,6 +51,11 @@ func makeControlPanel(for growingTextView: NextGrowingTextView) -> UIView {
       UIButton.make(title: "Min = 5") {
         growingTextView.configuration.minLines = 5
       }
+      
+      UIButton.make(title: "Long placeholder") {
+        growingTextView.placeholderLabel.text = "Placeholder, Placeholder, Placeholder, "
+        growingTextView.placeholderLabel.numberOfLines = 0
+      }
     }
 
   }

NextGrowingTextView/NextGrowingTextView.swift

@@ -185,6 +185,8 @@ open class NextGrowingTextView: UIView {
     case .center:
       NSLayoutConstraint.activate([
         placeholderLabel.centerXAnchor.constraint(equalTo: centerXAnchor, constant: 0),
+        placeholderLabel.leadingAnchor.constraint(greaterThanOrEqualTo: leadingAnchor, constant: inset.left + 4),
+        placeholderLabel.trailingAnchor.constraint(lessThanOrEqualTo: trailingAnchor, constant: -(inset.right + 4)),
       ])
     case .trailing:
       NSLayoutConstraint.activate([