UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"image_left"]]; imgView.frame = CGRectMake(0, 0, 20, 20); _textField.leftView = imgView; _textField.leftViewMode = UITextFieldViewModeAlways;
原文：http://www.cnblogs.com/zouyingying/p/4403069.html