IOS-从 UITextView 删除所有填充

Please try sub-classing the UITextView and overriding the following method:

    - (id)styleString
{
return [[super styleString] stringByAppendingString:@"; line-height: 1.6em;margin-right: 30px; margin-left: 0px; margin-top: 0px;"];
}

Apparently; you can tweak the margin-left, margin-top & whatever you want ;)

Although it is iOS 7 only, an extremely clean solution is to set the textView's textContainerInsets as such:

[textView setTextContainerInset:UIEdgeInsetsZero];
textView.textContainer.lineFragmentPadding = 0; // to remove left padding

This will effectively remove all padding (insets) around the text inside the text view. If your deployment target is iOS 7+ then this is the best solution thus far.

My problem is solved this way

if([Utils isiOS7orHigher]){
commentView.textContainerInset = UIEdgeInsetsZero;
}else {
commentView.contentInset = UIEdgeInsetsMake(-11,-8,0,0);
}

for more see http://foobarpig.com/iphone/get-rid-of-uitextview-padding.html

To completely remove all padding, the lineFragmentPadding must be taken into account.

let padding = textView.textContainer.lineFragmentPadding
textView.textContainerInset =  UIEdgeInsets(top: 0, left: -padding, bottom: 0, right: -padding)

The lineFragmentPadding default value is 5, and is at the beginning and end of fragment rectangle.

Some answers suggested setting lineFragmentPadding to 0. However, as per discussed in the doc, it is not designed to express text margins. So do not set it to 0.

Swift 4 version for the OA

self.tDescription.textContainerInset = UIEdgeInsets.zero
self.tDescription.textContainer.lineFragmentPadding = 0

For iOS 11.7

Following code worked for me:

    textView.textContainer.lineFragmentPadding = CGFloat(0.0)
textView.textContainerInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
textView.contentInset = UIEdgeInsets(top: 0,left: 0,bottom: 0,right: 0)

From the Official Documentation:

: It is possible to set the text container and view sizes and resizing behavior so that the inset cannot be maintained exactly, although the text system tries to maintain the inset wherever possible.