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- (void)viewDidLoad{ [super
viewDidLoad]; [self
addNavigationBar:FEEDBACK_VIEW_CONTROLLER]; UILabel *note = [[UILabel alloc] init]; [note setText:@"欢迎提出宝贵意见！您留下的每一份心意都将浇灌母婴宝的茁壮成长。"]; [note setLineBreakMode:NSLineBreakByWordWrapping]; note.numberOfLines = 0; [self.view addSubview:note]; //将自适应向布局约束的转化关掉(根据情况有时需要有时不需要) [note setTranslatesAutoresizingMaskIntoConstraints:NO]; [self.view addConstraint:[NSLayoutConstraint
constraintWithItem:note attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:navBar attribute:NSLayoutAttributeBottom multiplier:1.0 constant:10]]; [self.view addConstraint:[NSLayoutConstraint
constraintWithItem:note attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeLeft multiplier:1.0 constant:10]]; [self.view addConstraint:[NSLayoutConstraint
constraintWithItem:note attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeRight multiplier:1.0 constant:-10]]; UITextView *tfContent = [[UITextView alloc] init]; [tfContent setTranslatesAutoresizingMaskIntoConstraints:NO]; [tfContent setBackgroundColor:[UIColor whiteColor]]; [tfContent setReturnKeyType:UIReturnKeyDone]; [self.view addSubview:tfContent]; [self.view addConstraint:[NSLayoutConstraint
constraintWithItem:tfContent attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:note attribute:NSLayoutAttributeBottom multiplier:1.0 constant:10]]; [self.view addConstraint:[NSLayoutConstraint
constraintWithItem:tfContent attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeLeft multiplier:1.0 constant:10]]; [self.view addConstraint:[NSLayoutConstraint
constraintWithItem:tfContent attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeRight multiplier:1.0 constant:-10]]; [self.view addConstraint:[NSLayoutConstraint
constraintWithItem:tfContent attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:100]]; UITextField *tfEmail = [UITextField new]; [tfEmail setTranslatesAutoresizingMaskIntoConstraints:NO]; [tfEmail setBackgroundColor:[UIColor whiteColor]]; [tfEmail setClearButtonMode:UITextFieldViewModeAlways]; [tfEmail setReturnKeyType:UIReturnKeyDone]; [tfEmail setPlaceholder:@"请输入邮箱，以便我们联系你！"]; [self.view addSubview:tfEmail]; [self.view addConstraint:[NSLayoutConstraint
constraintWithItem:tfEmail attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:tfContent attribute:NSLayoutAttributeBottom multiplier:1.0 constant:10]]; [self.view addConstraint:[NSLayoutConstraint
constraintWithItem:tfEmail attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeLeft multiplier:1.0 constant:10]]; [self.view addConstraint:[NSLayoutConstraint
constraintWithItem:tfEmail attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeRight multiplier:1.0 constant:-10]]; [self.view addConstraint:[NSLayoutConstraint
constraintWithItem:tfEmail attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:35]]; UIButton *btnSubmit = [[UIButton alloc] init]; [btnSubmit setTranslatesAutoresizingMaskIntoConstraints:NO]; [btnSubmit setTitle:STRING_COMMON_SUBMIT forState:UIControlStateNormal]; [btnSubmit setBackgroundImage:[UIImage imageNamed:@"bg_red_orange"] forState:UIControlStateNormal]; [btnSubmit setBackgroundImage:[UIImage imageNamed:@"bg_red"] forState:UIControlStateHighlighted]; [self.view addSubview:btnSubmit]; NSMutableArray
*tmpConstraints = [NSMutableArray
array]; [tmpConstraints addObjectsFromArray:[NSLayoutConstraint
constraintsWithVisualFormat:@"V:[tfEmail]-10-[btnSubmit(==35)]"
options:0 metrics:nil
views:NSDictionaryOfVariableBindings(tfEmail,btnSubmit)]]; [tmpConstraints addObjectsFromArray:[NSLayoutConstraint
constraintsWithVisualFormat:@"H:|-10-[btnSubmit]-10-|"
options:0 metrics:nil
views:NSDictionaryOfVariableBindings(btnSubmit)]]; [self.view addConstraints:tmpConstraints]; } |
原文：http://www.cnblogs.com/warrior/p/3630372.html