iOS 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，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)verifyData{ if(tfPostName.text.length<1){ //01 tfPostName.layer.borderColor = [UIColor redColor].CGColor; tfPostName.layer.borderWidth =1.0; tfPostName.layer.cornerRadius =5.0; return NO; } else if (tfPositionType.text.length<1){ //02 tfPositionType.layer.borderColor = [UIColor redColor].CGColor; tfPositionType.layer.borderWidth =1.0; tfPositionType.layer.cornerRadius =5.0; return NO; } else if ( tfPeopleNum.text.length<1){ //03 tfPeopleNum.layer.borderColor = [UIColor redColor].CGColor; tfPeopleNum.layer.borderWidth =1.0; tfPeopleNum.layer.cornerRadius =5.0; return NO; } else if ( tfWages.text.length<1){ //04 tfWages.layer.borderColor = [UIColor redColor].CGColor; tfWages.layer.borderWidth =1.0; tfWages.layer.cornerRadius =5.0; return NO; }else if (tfUnit.text.length<1){ //05 tfUnit.layer.borderColor = [UIColor redColor].CGColor; tfUnit.layer.borderWidth =1.0; tfUnit.layer.cornerRadius =5.0; return NO; }else if (tfStartDate.text.length<1){ //07 tfStartDate.layer.borderColor = [UIColor redColor].CGColor; tfStartDate.layer.borderWidth =1.0; tfStartDate.layer.cornerRadius =5.0; return NO; }else if (tfEndDate.text.length<1){ //08 tfEndDate.layer.borderColor = [UIColor redColor].CGColor; tfEndDate.layer.borderWidth =1.0; tfEndDate.layer.cornerRadius =5.0; return NO; }else if (tfSescribe.text.length<1){ //09 tfSescribe.layer.borderColor = [UIColor redColor].CGColor; tfSescribe.layer.borderWidth =1.0; tfSescribe.layer.cornerRadius =5.0; //tfSescribe.text.length == 0; return NO; }
// }else if (tfPayWay.text.length<1){ //tfSescribe // //10--// tfPayWay.layer.borderColor = [UIColor redColor].CGColor;// tfPayWay.layer.borderWidth =1.0;// tfPayWay.layer.cornerRadius =5.0;// return NO;// // } else if (tfContactPerson.text.length<1){ //11 tfContactPerson.layer.borderColor = [UIColor redColor].CGColor; tfContactPerson.layer.borderWidth =1.0; tfContactPerson.layer.cornerRadius =5.0; return NO; } else if ( tfContactPhone.text.length<1){ //12-- tfContactPhone.layer.borderColor = [UIColor redColor].CGColor; tfContactPhone.layer.borderWidth =1.0; tfContactPhone.layer.cornerRadius =5.0; return NO; }else if (tfJobArea.text.length<1){ //13 tfJobArea.layer.borderColor = [UIColor redColor].CGColor; tfJobArea.layer.borderWidth =1.0; tfJobArea.layer.cornerRadius =5.0; return NO; } else if (tfDetailAddress.text.length<1){ //14-- tfDetailAddress.layer.borderColor = [UIColor redColor].CGColor; tfDetailAddress.layer.borderWidth =1.0; tfDetailAddress.layer.cornerRadius =5.0; return NO; }else if (tfUnit.text.length<1){ //15 tfUnit.layer.borderColor = [UIColor redColor].CGColor; tfUnit.layer.borderWidth =1.0; tfUnit.layer.cornerRadius =5.0; return NO; } else { return YES; } }

//岗位描述不能为空的判断#pragma mark- UITextViewDelegate- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{ NSMutableString * changedString=[[NSMutableString alloc]initWithString:tfSescribe.text]; [changedString replaceCharactersInRange:range withString:text]; if (changedString.length<1) { //self.navigationItem.rightBarButtonItem.enabled=YES; [CMNavBarNotificationView notifyWithText:@"" andDetail:@"请完善发布信息"]; }else{ //self.navigationItem.rightBarButtonItem.enabled=NO; //[CMNavBarNotificationView notifyWithText:@"" andDetail:@"请完善发布信息"]; } return YES;}