监测多个textFiled.text的长度同时不小于0

#pragma mark - 显示超过11位不让输入

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

NSString * str1 = _nameTextFiled.text;

NSString * str2 = _numberTextFiled.text;

NSString * str3 = _passWordTextFiled1.text;

NSString * str4 = _passWordTextFiled2.text;

if (textField == _nameTextFiled) {

str1 = [_nameTextFiled.text stringByAppendingString:string];

}else if (textField == _numberTextFiled){

str2 = [_numberTextFiled.text stringByAppendingString:string];

}else if (textField == _passWordTextFiled1){

str3 = [_passWordTextFiled1.text stringByAppendingString:string];

}else if (textField == _passWordTextFiled2){

str4 = [_passWordTextFiled2.text stringByAppendingString:string];

}

//保存按钮显示与隐藏

if (str1.length*str2.length*str3.length*str4.length!=0) {

[self SaveButtonEnbale];

}else{

[self SaveButtonNotEnbale];

}

return YES;

}