NoSuchElementException: None.get给我role，但如果删除@interface ViewController10 ()
{
UIScrollView * scrollView;
UITextField * emailTextField;
UITextField * nameTextField;
UITextField * passwword;
UIButton * submit;
}
@end
@implementation ViewController10
- (void)viewDidLoad {
[super viewDidLoad];
scrollView = [[UIScrollView alloc] init];
scrollView.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:scrollView];
emailTextField = [self createLabelWithText];
emailTextField.delegate = self;
[scrollView addSubview: emailTextField];
nameTextField = [self createLabelWithText];
nameTextField.delegate = self;
[scrollView addSubview: nameTextField];
passwword = [self createLabelWithText];
passwword.delegate = self;
[scrollView addSubview: passwword];
submit = [[UIButton alloc]init];
submit.backgroundColor = [UIColor orangeColor];
[submit setTitle: @"Submit" forState: UIControlStateNormal];
submit.translatesAutoresizingMaskIntoConstraints = NO;
[scrollView addSubview:submit];
NSDictionary * viewsDic = NSDictionaryOfVariableBindings(scrollView,emailTextField,nameTextField,passwword,submit);
//Applying autolayouts for scrolview
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"H:|-0-[scrollView]-0-|"]
options:0
metrics:nil
views:viewsDic]];
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"V:|-0-[scrollView]-0-|"]
options:0
metrics:nil
views:viewsDic]];
//Applying autolayouts for textfields and button
[scrollView addConstraint:[NSLayoutConstraint constraintWithItem:emailTextField
attribute:NSLayoutAttributeCenterX
relatedBy:NSLayoutRelationEqual
toItem:scrollView
attribute:NSLayoutAttributeCenterX
multiplier:1
constant:0]];
NSArray * keys = @[@"emailTextField",@"nameTextField",@"passwword",@"submit"];
for (NSString * key in keys) {
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"H:|-10-[%@]-10-|",key]
options:0
metrics:nil
views:viewsDic]];
}
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-30-[emailTextField(30)]-130-[nameTextField(30)]-130-[passwword(30)]-60-[submit(30)]-20-|"
options:0
metrics:nil
views:viewsDic]];
}
-(UITextField *)createLabelWithText{
UITextField * textfield = [[UITextField alloc] init];
textfield.textColor = [UIColor whiteColor];
textfield.backgroundColor = [UIColor lightGrayColor];
textfield.translatesAutoresizingMaskIntoConstraints = NO;
return textfield;
}
- (void)textFieldDidBeginEditing:(UITextField *)textField{
scrollView.contentSize = CGSizeMake(320, 700);
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField{
[textField resignFirstResponder];
return YES;
}
，则可以正常使用。
答案 0 :(得分：0)
致电git checkout -- filename_in_conflict
永远不是一个好主意。您需要处理Option.get返回bindFromRequest的情况。
您可以使用Option.fold(ifEmpty)(f)或None。
Option.map(f).getOrElse(ifEmpty)