iOSUITextField或UITextView的内容是否为空-创新互联

//判断正在编辑的UITextField或UITextView的内容是否为空，判断正在编辑的UITextField或UITextView的内容是否为空，以此来控制button的点亮状态

#pragma mark- UITextFieldDelegate

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

{

    NSMutableString * changedString=[[NSMutableString alloc]initWithString:textField.text];

    [changedString replaceCharactersInRange:range withString:string];

    if (changedString.length!=0) {

        self.navigationItem.rightBarButtonItem.enabled=YES;

    }else{

        self.navigationItem.rightBarButtonItem.enabled=NO;

    }

    return YES;

}

#pragma mark- UITextViewDelegate

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString*)text

{

    NSMutableString * changedString=[[NSMutableString alloc]initWithString:textView.text];

    [changedString replaceCharactersInRange:range withString:text];

    if (changedString.length!=0) {

        self.navigationItem.rightBarButtonItem.enabled=YES;

    }else{

        self.navigationItem.rightBarButtonItem.enabled=NO;

    }

    return YES;

}

//一些判断技巧

BOOL

iftfPostNametextlength1

//01

    tfPostName.. = [ redColor].;

    tfPostName.. =1.0;

    tfPostName.. =5.0;

returnNO

  else if (.text.length<1){

//02

    tfPositionType.. = [ redColor].;

    tfPositionType.. =1.0;

    tfPositionType.. =5.0;

returnNO

elseiftfPeopleNumtextlength1

//03

     tfPeopleNum.. = [ redColor].;

     tfPeopleNum.. =1.0;

     tfPeopleNum.. =5.0;

returnNO

elseiftfWagestextlength1

//04

     tfWages.. = [ redColor].;

     tfWages.. =1.0;

     tfWages.. =5.0;

returnNO

elseiftfUnittextlength1

//05

    tfUnit.. = [ redColor].;

    tfUnit.. =1.0;

    tfUnit.. =5.0;

returnNO

elseiftfStartDatetextlength1

//07

    tfStartDate.. = [ redColor].;

    tfStartDate.. =1.0;

    tfStartDate.. =5.0;

returnNO

elseiftfEndDatetextlength1

//08

    tfEndDate.. = [ redColor].;

    tfEndDate.. =1.0;

    tfEndDate.. =5.0;

returnNO

elseiftfSescribetextlength1

//09

    tfSescribe.. = [ redColor].;

    tfSescribe.. =1.0;

    tfSescribe.. =5.0;

returnNO

elseiftfContactPersontextlength1

//11

    tfContactPerson.. = [ redColor].;

    tfContactPerson.. =1.0;

    tfContactPerson.. =5.0;

returnNO

  else if ( .text.length<1){

//12--

    tfContactPhone.. = [ redColor].;

    tfContactPhone.. =1.0;

    tfContactPhone.. =5.0;

returnNO

elseiftfJobAreatextlength1

//13

    tfJobArea.. = [ redColor].;

    tfJobArea.. =1.0;

    tfJobArea.. =5.0;

returnNO

  else if (.text.length<1){

//14--

    tfDetailAddress.. = [ redColor].;

    tfDetailAddress.. =1.0;

    tfDetailAddress.. =5.0;

returnNO

elseiftfUnittextlength1

//15

    tfUnit.. = [ redColor].;

    tfUnit.. =1.0;

    tfUnit.. =5.0;

returnNO

else

returnYES

//

BOOLUITextViewNSRangeNSString

   * changedString=[[ alloc]initWithString:tfSescribe.];

  [changedString :range :text];

iflength1

     [ notifyWithText:@"" andDetail:@"请完善发布信息"];

else

    请完善发布信息

   ;

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