TextField自定義驗證

Question

大家好，我試圖爲每個文本字段嵌入圖像... 當我將文本插入第一個文本字段時，圖像也對第二個文本字段產生影響。我會將圖像visualizzassero用戶選擇的每個文本字段，而不是直接給所有...我在哪裏做錯了？

感謝所有

-(BOOL)textFieldShouldEndEditing:(UITextField *)textField { 
    NSString *nomecognome = self.FF_NomeCognomeTexfield.text ; 
    NSString *user = self.FF_UsernameTextField.text ; 

    if ([nomecognome length] == 0 || [user length] == 0 ){ 

     FF_NomeCognomeTexfield.leftViewMode = UITextFieldViewModeAlways; 

     UIImageView* imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 32, 32)]; 
     imageView.image = [UIImage imageNamed:@"FF_CheckOFF"]; 
     imageView.contentMode = UIViewContentModeScaleAspectFit; 
     FF_NomeCognomeTexfield.leftView = imageView; 

     FF_UsernameTextField.leftViewMode = UITextFieldViewModeAlways; 
     UIImageView* imageView1 = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 32, 32)]; 
     imageView1.image = [UIImage imageNamed:@"FF_CheckOFF"]; 
     imageView1.contentMode = UIViewContentModeScaleAspectFit; 
     FF_UsernameTextField.leftView = imageView1; 
    } else { 
     FF_NomeCognomeTexfield.leftViewMode = UITextFieldViewModeAlways; 
     UIImageView* imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 32, 32)]; 
     imageView.image = [UIImage imageNamed:@"FF_CheckON"]; 
     imageView.contentMode = UIViewContentModeScaleAspectFit; 
     FF_NomeCognomeTexfield.leftView = imageView; 

     FF_UsernameTextField.leftViewMode = UITextFieldViewModeAlways; 
     UIImageView* imageView1 = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 32, 32)]; 
     imageView1.image = [UIImage imageNamed:@"FF_CheckON"]; 
     imageView1.contentMode = UIViewContentModeScaleAspectFit; 
     FF_UsernameTextField.leftView = imageView1; 
    } 
    return YES; 
} 

Answer 1

所有文本框觸發此方法。您應該在if語句中使用參數'textField'來確定發件人的身份。

if([textField isEqual: FF_NomeCognomeTexfield] == YES){ 
    ... 
}