How to determine the length of the text in a UITextfield

问题

I have a UITextField from which I'd like to determine the width of the entered text.

The bounds property has just the size of the Textfield but not of the text

回答1:

CGFloat width =  [aTextField.text sizeWithFont:aTextField.font].width;

回答2:

Now that sizeWithFont: is deprecated in iOS 7.0 use

CGFloat width =  [tf.text sizeWithAttributes: @{NSFontAttributeName:tf.font}].width;

https://developer.apple.com/library/ios/documentation/UIKit/Reference/NSString_UIKit_Additions/#//apple_ref/occ/instm/NSString/sizeWithAttributes:

回答3:

If you are looking for character count it is this

int textLength = [someTextField.text length]

If you are looking for pixel width try this

CGSize size = [someTextField.text sizeWithFont:someTextField.font];
//size.width contains the width

回答4:

In Swift 3.0

let size:CGSize = aTextField.attributedText.size()
let height = size.height
let width = size.width

回答5:

CGSize size = [myTextField.text sizeWithFont:myTextField.font];

Documentation here: http://developer.apple.com/library/ios/documentation/UIKit/Reference/NSString_UIKit_Additions/Reference/Reference.html#//apple_ref/occ/instm/NSString/sizeWithFont:

回答6:

Does this Pixel Width of the text in a UILabel help ?

回答7:

textField is delegate which is attac in interface builder than......

[textField.text length]

来源：https://stackoverflow.com/questions/4820355/how-to-determine-the-length-of-the-text-in-a-uitextfield