垂直滚动无法以编程方式工作 UIScrollView
Vertical scrolling not working UIScrollView programatically
我不确定我的代码有什么问题。我在 UIScrollView 中嵌入了 UIView。 UIView 中嵌入了一些控件。我希望 UIView 发生滚动，但事实并非如此。最终我无法查看所有控件。我只是在下面粘贴我的代码。感谢有人指出我在这里遗漏的内容。
UIView *parentView = [[UIView alloc]init];
[parentView setTranslatesAutoresizingMaskIntoConstraints:NO];
parentView.backgroundColor = [UIColor whiteColor];
[self.view addSubview: parentView];
NSArray *parentViewHConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:[parentView(==mainView)]" options:0 metrics:0 views:@{@"parentView": parentView, @"mainView":self.view}];
NSArray *parentViewVConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-10-[parentView]-10-|" options:0 metrics:0 views:@{@"parentView": parentView}];
[self.view addConstraints:parentViewHConstraints];
[self.view addConstraints:parentViewVConstraints];
self.myScrollView = [[UIScrollView alloc] init];
//CGSize scrollableSize = CGSizeMake(100, 200);
//[self.myScrollView setContentSize:scrollableSize];
[parentView addSubview:self.myScrollView];
self.myScrollView.backgroundColor = [UIColor lightGrayColor];
self.myScrollView.translatesAutoresizingMaskIntoConstraints = NO;
NSArray *scrollViewHContraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[scrollView]|" options:0 metrics:0 views:@{@"scrollView": self.myScrollView}];
[parentView addConstraints:scrollViewHContraints];
UIView *contentView = [[UIView alloc]init];
contentView.translatesAutoresizingMaskIntoConstraints = NO;
[self.myScrollView addSubview:contentView];
self.myScrollView.showsVerticalScrollIndicator = YES;
self.myScrollView.pagingEnabled = YES;
self.myScrollView.contentSize = CGSizeMake(510,221);
NSArray *contentViewHConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[contentview(==scrollView)]|" options:0 metrics:nil views:@{@"contentview": contentView,@"scrollView": self.myScrollView}];
NSArray *contentViewVConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[contentview(==scrollView)]|" options:0 metrics:nil views:@{@"contentview": contentView,@"scrollView": self.myScrollView}];
[self.myScrollView addConstraints:contentViewHConstraints];
[self.myScrollView addConstraints:contentViewVConstraints];
UIFont *headingFont = [UIFont fontWithName:@"Helvetica Neue" size:40];
self.m_ObjTopHeadingLbl = [[UILabel alloc]init];
[self.m_ObjTopHeadingLbl setText:@"Registration"];
self.m_ObjTopHeadingLbl.font = headingFont;
[self.m_ObjTopHeadingLbl setTextColor:[UIColor redColor]];
self.m_ObjTopHeadingLbl.translatesAutoresizingMaskIntoConstraints = NO;
[contentView addSubview:self.m_ObjTopHeadingLbl];
NSArray *topHeadingHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[registView]-|" options:0 metrics:nil views:@{@"registView": self.m_ObjTopHeadingLbl}];
[contentView addConstraints:topHeadingHorzConstraint];
// Name field
self.m_ObjNameField = [[JVFloatLabeledTextField alloc]init];
self.m_ObjNameField.borderStyle = UITextBorderStyleRoundedRect;
self.m_ObjNameField.translatesAutoresizingMaskIntoConstraints = NO;
self.m_ObjNameField.placeholder = [NSString stringWithFormat:@"Enter your short name"];
[contentView addSubview:self.m_ObjNameField];
NSArray *nameFieldHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[nameFieldView]-|" options:0 metrics:nil views:@{@"nameFieldView": self.m_ObjNameField}];
[contentView addConstraints:nameFieldHorzConstraint];
// Info on the name field
UILabel* nameFieldLbl = [[UILabel alloc]init];
[nameFieldLbl setText:@"Will be visible to all on ipomo"];
UIFont *nameFieldLblFont = [UIFont fontWithName:@"Arial-BoldMT" size:13];
[nameFieldLbl setFont:nameFieldLblFont];
[nameFieldLbl setTextColor:[UIColor grayColor]];
nameFieldLbl.translatesAutoresizingMaskIntoConstraints = NO;
[contentView addSubview:nameFieldLbl];
NSArray *nameFieldlblHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[nameFieldLbl]-|" options:0 metrics:nil views:@{@"nameFieldLbl": nameFieldLbl}];
[contentView addConstraints:nameFieldlblHorzConstraint];
// Mobilenumber field
self.m_ObjMobNo = [[JVFloatLabeledTextField alloc]init];
self.m_ObjMobNo.borderStyle = UITextBorderStyleRoundedRect;
self.m_ObjMobNo.translatesAutoresizingMaskIntoConstraints = NO;
self.m_ObjMobNo.placeholder = [NSString stringWithFormat:@"Enter your mobilenumber"];
[contentView addSubview:self.m_ObjMobNo];
NSArray *mobnoFieldHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[mobnoField]-|" options:0 metrics:nil views:@{@"mobnoField": self.m_ObjMobNo}];
[contentView addConstraints:mobnoFieldHorzConstraint];
// Info on the mobile number field
UILabel* mobnoFieldLbl = [[UILabel alloc]init];
[mobnoFieldLbl setText:@"To send you the activation code. Hidden and secure"];
dispatch_async(dispatch_get_main_queue(), ^{
mobnoFieldLbl.preferredMaxLayoutWidth = self.view.bounds.size.width;
});
UIFont *mobnoFieldLblFont = [UIFont fontWithName:@"Arial-BoldMT" size:13];
[mobnoFieldLbl setFont:mobnoFieldLblFont];
mobnoFieldLbl.numberOfLines = 0;
[mobnoFieldLbl setTextColor:[UIColor grayColor]];
mobnoFieldLbl.translatesAutoresizingMaskIntoConstraints = NO;
[contentView addSubview:mobnoFieldLbl];
NSArray *mobnoFieldlblHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[mobnoFieldlbl]-|" options:0 metrics:nil views:@{@"mobnoFieldlbl": mobnoFieldLbl}];
[contentView addConstraints:mobnoFieldlblHorzConstraint];
// Email id field
self.m_ObjEmailId = [[JVFloatLabeledTextField alloc]init];
self.m_ObjEmailId.borderStyle = UITextBorderStyleRoundedRect;
self.m_ObjEmailId.translatesAutoresizingMaskIntoConstraints = NO;
self.m_ObjEmailId.placeholder = [NSString stringWithFormat:@"Enter your email id"];
[contentView addSubview:self.m_ObjEmailId];
NSArray *emailFieldHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[emailField]-|" options:0 metrics:nil views:@{@"emailField": self.m_ObjEmailId}];
[contentView addConstraints:emailFieldHorzConstraint];
// Info on the email field
UILabel* emailFieldLbl = [[UILabel alloc]init];
[emailFieldLbl setText:@"To send analytics and reports on happenings in you room(s). Hidden and secure"];
emailFieldLbl.numberOfLines = 0;
UIFont *emailFieldLblFont = [UIFont fontWithName:@"Arial-BoldMT" size:13];
dispatch_async(dispatch_get_main_queue(), ^{
emailFieldLbl.preferredMaxLayoutWidth = self.view.bounds.size.width;
});
[emailFieldLbl setFont:emailFieldLblFont];
[emailFieldLbl setTextColor:[UIColor grayColor]];
emailFieldLbl.translatesAutoresizingMaskIntoConstraints = NO;
[contentView addSubview:emailFieldLbl];
NSArray *emailFieldlblHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[emailFieldlbl]-|" options:0 metrics:nil views:@{@"emailFieldlbl": emailFieldLbl}];
[contentView addConstraints:emailFieldlblHorzConstraint];
// Promo code field
self.m_ObjPromoCode = [[JVFloatLabeledTextField alloc]init];
self.m_ObjPromoCode.borderStyle = UITextBorderStyleRoundedRect;
self.m_ObjPromoCode.translatesAutoresizingMaskIntoConstraints = NO;
self.m_ObjPromoCode.placeholder = [NSString stringWithFormat:@"Enter promocode (if applicable)"];
[contentView addSubview:self.m_ObjPromoCode];
NSArray *promocodeFieldHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[promocodeField]-|" options:0 metrics:nil views:@{@"promocodeField": self.m_ObjPromoCode}];
[contentView addConstraints:promocodeFieldHorzConstraint];
// Submit button
self.m_ObjSubmitBut = [[UIButton alloc]init];
[self.m_ObjSubmitBut setTitle: [NSString stringWithFormat:@"SUBMIT"] forState:UIControlStateNormal];
self.m_ObjSubmitBut.backgroundColor = [UIColor redColor];
[self.m_ObjSubmitBut setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
self.m_ObjSubmitBut.translatesAutoresizingMaskIntoConstraints = NO;
self.m_ObjSubmitBut.layer.cornerRadius = 10;
self.m_ObjSubmitBut.clipsToBounds = YES;
[parentView addSubview:self.m_ObjSubmitBut];
NSDictionary *myTopViews = @{
@"scrollView": self.myScrollView,
@"submitButton": self.m_ObjSubmitBut,
};
NSArray *myTopVConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[scrollView]-[submitButton(40)]|" options:0 metrics:nil views:myTopViews];
NSArray *myTopHConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[submitButton]-|" options:0 metrics:nil views:@{@"submitButton": self.m_ObjSubmitBut}];
[parentView addConstraints:myTopVConstraints];
[parentView addConstraints:myTopHConstraints];
NSDictionary* myViews = @{
@"registView": self.m_ObjTopHeadingLbl,
@"nameView": self.m_ObjNameField,
@"nameFieldLbl": nameFieldLbl,
@"mobnoView":self.m_ObjMobNo,
@"mobnoFieldLbl":mobnoFieldLbl,
@"emailView":self.m_ObjEmailId,
@"emailFieldLbl":emailFieldLbl,
@"promocodeView":self.m_ObjPromoCode
};
NSDictionary* myMetrics = @{
@"sepHeight" : @30.0f,
@"sepHeight1" : @5.0f
};
NSArray *otherConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:[registView]-sepHeight-[nameView]-sepHeight1-[nameFieldLbl]-sepHeight-[mobnoView]-sepHeight1-[mobnoFieldLbl]-sepHeight-[emailView]-sepHeight1-[emailFieldLbl]-sepHeight-[promocodeView]" options:0 metrics:myMetrics views:myViews];
[contentView addConstraints:otherConstraints];
我认为您没有提及 scrollEnabled 或 UIScrollView，请尝试以下行，希望它对您有用。
scrollView.scrollEnabled = YES;
同时设置 contentSize 并且其大小应大于包含 window 的大小以使其可滚动。
[self.scrollforImage setContentSize:CGSizeMake(3000, 3000)];// replace 3000, 3000 according to your need
您正在将内容视图的大小设置为等于包含滚动视图的大小。从逻辑上讲，这意味着滚动视图没有可滚动到的区域，因此将被固定。您需要使内容视图更长（用于垂直滚动）或更宽（用于水平滚动）。
您的代码中对滚动视图的约束不够。使用 auto-layout 时，确保在垂直和水平方向上添加适当的约束链。
对于要滚动的滚动视图，这些是一些通用准则，
确保 UI 的所有不同部分都有足够数量的垂直和水平约束。在屏幕中使用一个简单的 UILabel。它需要一个 x,y 位置 - 可以是 leading/top, center 属性，它需要一个大小定义 - 固定宽度和高度或对附近元素的约束。它需要明确定义的位置 - 大小组合才能由 auto-layout.
如果你把translatesAutoresizingMaskIntoConstraints设置为NO，你的意思是组件不应该取frame,size已经设置为constraint要求。如果您想明确提及某些元素的框架或大小，请将其保留为“是”。
如果 contentview 的所有四个边都固定在 scrollview 上，并且 scrollview 的大小、位置定义为约束或框架，就足以使内容可滚动。
如果contentview的内容大小在不同的事件中动态变化，你可以将scrollview.contentsize显式设置为contentview.width和contentview.height。
此外，请查看 Apple 关于 AutoLayout 和 Scrollviews 的技术说明 this。
我不确定我的代码有什么问题。我在 UIScrollView 中嵌入了 UIView。 UIView 中嵌入了一些控件。我希望 UIView 发生滚动，但事实并非如此。最终我无法查看所有控件。我只是在下面粘贴我的代码。感谢有人指出我在这里遗漏的内容。
UIView *parentView = [[UIView alloc]init];
[parentView setTranslatesAutoresizingMaskIntoConstraints:NO];
parentView.backgroundColor = [UIColor whiteColor];
[self.view addSubview: parentView];
NSArray *parentViewHConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:[parentView(==mainView)]" options:0 metrics:0 views:@{@"parentView": parentView, @"mainView":self.view}];
NSArray *parentViewVConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-10-[parentView]-10-|" options:0 metrics:0 views:@{@"parentView": parentView}];
[self.view addConstraints:parentViewHConstraints];
[self.view addConstraints:parentViewVConstraints];
self.myScrollView = [[UIScrollView alloc] init];
//CGSize scrollableSize = CGSizeMake(100, 200);
//[self.myScrollView setContentSize:scrollableSize];
[parentView addSubview:self.myScrollView];
self.myScrollView.backgroundColor = [UIColor lightGrayColor];
self.myScrollView.translatesAutoresizingMaskIntoConstraints = NO;
NSArray *scrollViewHContraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[scrollView]|" options:0 metrics:0 views:@{@"scrollView": self.myScrollView}];
[parentView addConstraints:scrollViewHContraints];
UIView *contentView = [[UIView alloc]init];
contentView.translatesAutoresizingMaskIntoConstraints = NO;
[self.myScrollView addSubview:contentView];
self.myScrollView.showsVerticalScrollIndicator = YES;
self.myScrollView.pagingEnabled = YES;
self.myScrollView.contentSize = CGSizeMake(510,221);
NSArray *contentViewHConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[contentview(==scrollView)]|" options:0 metrics:nil views:@{@"contentview": contentView,@"scrollView": self.myScrollView}];
NSArray *contentViewVConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[contentview(==scrollView)]|" options:0 metrics:nil views:@{@"contentview": contentView,@"scrollView": self.myScrollView}];
[self.myScrollView addConstraints:contentViewHConstraints];
[self.myScrollView addConstraints:contentViewVConstraints];
UIFont *headingFont = [UIFont fontWithName:@"Helvetica Neue" size:40];
self.m_ObjTopHeadingLbl = [[UILabel alloc]init];
[self.m_ObjTopHeadingLbl setText:@"Registration"];
self.m_ObjTopHeadingLbl.font = headingFont;
[self.m_ObjTopHeadingLbl setTextColor:[UIColor redColor]];
self.m_ObjTopHeadingLbl.translatesAutoresizingMaskIntoConstraints = NO;
[contentView addSubview:self.m_ObjTopHeadingLbl];
NSArray *topHeadingHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[registView]-|" options:0 metrics:nil views:@{@"registView": self.m_ObjTopHeadingLbl}];
[contentView addConstraints:topHeadingHorzConstraint];
// Name field
self.m_ObjNameField = [[JVFloatLabeledTextField alloc]init];
self.m_ObjNameField.borderStyle = UITextBorderStyleRoundedRect;
self.m_ObjNameField.translatesAutoresizingMaskIntoConstraints = NO;
self.m_ObjNameField.placeholder = [NSString stringWithFormat:@"Enter your short name"];
[contentView addSubview:self.m_ObjNameField];
NSArray *nameFieldHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[nameFieldView]-|" options:0 metrics:nil views:@{@"nameFieldView": self.m_ObjNameField}];
[contentView addConstraints:nameFieldHorzConstraint];
// Info on the name field
UILabel* nameFieldLbl = [[UILabel alloc]init];
[nameFieldLbl setText:@"Will be visible to all on ipomo"];
UIFont *nameFieldLblFont = [UIFont fontWithName:@"Arial-BoldMT" size:13];
[nameFieldLbl setFont:nameFieldLblFont];
[nameFieldLbl setTextColor:[UIColor grayColor]];
nameFieldLbl.translatesAutoresizingMaskIntoConstraints = NO;
[contentView addSubview:nameFieldLbl];
NSArray *nameFieldlblHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[nameFieldLbl]-|" options:0 metrics:nil views:@{@"nameFieldLbl": nameFieldLbl}];
[contentView addConstraints:nameFieldlblHorzConstraint];
// Mobilenumber field
self.m_ObjMobNo = [[JVFloatLabeledTextField alloc]init];
self.m_ObjMobNo.borderStyle = UITextBorderStyleRoundedRect;
self.m_ObjMobNo.translatesAutoresizingMaskIntoConstraints = NO;
self.m_ObjMobNo.placeholder = [NSString stringWithFormat:@"Enter your mobilenumber"];
[contentView addSubview:self.m_ObjMobNo];
NSArray *mobnoFieldHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[mobnoField]-|" options:0 metrics:nil views:@{@"mobnoField": self.m_ObjMobNo}];
[contentView addConstraints:mobnoFieldHorzConstraint];
// Info on the mobile number field
UILabel* mobnoFieldLbl = [[UILabel alloc]init];
[mobnoFieldLbl setText:@"To send you the activation code. Hidden and secure"];
dispatch_async(dispatch_get_main_queue(), ^{
mobnoFieldLbl.preferredMaxLayoutWidth = self.view.bounds.size.width;
});
UIFont *mobnoFieldLblFont = [UIFont fontWithName:@"Arial-BoldMT" size:13];
[mobnoFieldLbl setFont:mobnoFieldLblFont];
mobnoFieldLbl.numberOfLines = 0;
[mobnoFieldLbl setTextColor:[UIColor grayColor]];
mobnoFieldLbl.translatesAutoresizingMaskIntoConstraints = NO;
[contentView addSubview:mobnoFieldLbl];
NSArray *mobnoFieldlblHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[mobnoFieldlbl]-|" options:0 metrics:nil views:@{@"mobnoFieldlbl": mobnoFieldLbl}];
[contentView addConstraints:mobnoFieldlblHorzConstraint];
// Email id field
self.m_ObjEmailId = [[JVFloatLabeledTextField alloc]init];
self.m_ObjEmailId.borderStyle = UITextBorderStyleRoundedRect;
self.m_ObjEmailId.translatesAutoresizingMaskIntoConstraints = NO;
self.m_ObjEmailId.placeholder = [NSString stringWithFormat:@"Enter your email id"];
[contentView addSubview:self.m_ObjEmailId];
NSArray *emailFieldHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[emailField]-|" options:0 metrics:nil views:@{@"emailField": self.m_ObjEmailId}];
[contentView addConstraints:emailFieldHorzConstraint];
// Info on the email field
UILabel* emailFieldLbl = [[UILabel alloc]init];
[emailFieldLbl setText:@"To send analytics and reports on happenings in you room(s). Hidden and secure"];
emailFieldLbl.numberOfLines = 0;
UIFont *emailFieldLblFont = [UIFont fontWithName:@"Arial-BoldMT" size:13];
dispatch_async(dispatch_get_main_queue(), ^{
emailFieldLbl.preferredMaxLayoutWidth = self.view.bounds.size.width;
});
[emailFieldLbl setFont:emailFieldLblFont];
[emailFieldLbl setTextColor:[UIColor grayColor]];
emailFieldLbl.translatesAutoresizingMaskIntoConstraints = NO;
[contentView addSubview:emailFieldLbl];
NSArray *emailFieldlblHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[emailFieldlbl]-|" options:0 metrics:nil views:@{@"emailFieldlbl": emailFieldLbl}];
[contentView addConstraints:emailFieldlblHorzConstraint];
// Promo code field
self.m_ObjPromoCode = [[JVFloatLabeledTextField alloc]init];
self.m_ObjPromoCode.borderStyle = UITextBorderStyleRoundedRect;
self.m_ObjPromoCode.translatesAutoresizingMaskIntoConstraints = NO;
self.m_ObjPromoCode.placeholder = [NSString stringWithFormat:@"Enter promocode (if applicable)"];
[contentView addSubview:self.m_ObjPromoCode];
NSArray *promocodeFieldHorzConstraint = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[promocodeField]-|" options:0 metrics:nil views:@{@"promocodeField": self.m_ObjPromoCode}];
[contentView addConstraints:promocodeFieldHorzConstraint];
// Submit button
self.m_ObjSubmitBut = [[UIButton alloc]init];
[self.m_ObjSubmitBut setTitle: [NSString stringWithFormat:@"SUBMIT"] forState:UIControlStateNormal];
self.m_ObjSubmitBut.backgroundColor = [UIColor redColor];
[self.m_ObjSubmitBut setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
self.m_ObjSubmitBut.translatesAutoresizingMaskIntoConstraints = NO;
self.m_ObjSubmitBut.layer.cornerRadius = 10;
self.m_ObjSubmitBut.clipsToBounds = YES;
[parentView addSubview:self.m_ObjSubmitBut];
NSDictionary *myTopViews = @{
@"scrollView": self.myScrollView,
@"submitButton": self.m_ObjSubmitBut,
};
NSArray *myTopVConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[scrollView]-[submitButton(40)]|" options:0 metrics:nil views:myTopViews];
NSArray *myTopHConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[submitButton]-|" options:0 metrics:nil views:@{@"submitButton": self.m_ObjSubmitBut}];
[parentView addConstraints:myTopVConstraints];
[parentView addConstraints:myTopHConstraints];
NSDictionary* myViews = @{
@"registView": self.m_ObjTopHeadingLbl,
@"nameView": self.m_ObjNameField,
@"nameFieldLbl": nameFieldLbl,
@"mobnoView":self.m_ObjMobNo,
@"mobnoFieldLbl":mobnoFieldLbl,
@"emailView":self.m_ObjEmailId,
@"emailFieldLbl":emailFieldLbl,
@"promocodeView":self.m_ObjPromoCode
};
NSDictionary* myMetrics = @{
@"sepHeight" : @30.0f,
@"sepHeight1" : @5.0f
};
NSArray *otherConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:[registView]-sepHeight-[nameView]-sepHeight1-[nameFieldLbl]-sepHeight-[mobnoView]-sepHeight1-[mobnoFieldLbl]-sepHeight-[emailView]-sepHeight1-[emailFieldLbl]-sepHeight-[promocodeView]" options:0 metrics:myMetrics views:myViews];
[contentView addConstraints:otherConstraints];
我认为您没有提及 scrollEnabled 或 UIScrollView，请尝试以下行，希望它对您有用。
scrollView.scrollEnabled = YES;
同时设置 contentSize 并且其大小应大于包含 window 的大小以使其可滚动。
[self.scrollforImage setContentSize:CGSizeMake(3000, 3000)];// replace 3000, 3000 according to your need
您正在将内容视图的大小设置为等于包含滚动视图的大小。从逻辑上讲，这意味着滚动视图没有可滚动到的区域，因此将被固定。您需要使内容视图更长（用于垂直滚动）或更宽（用于水平滚动）。
您的代码中对滚动视图的约束不够。使用 auto-layout 时，确保在垂直和水平方向上添加适当的约束链。
对于要滚动的滚动视图，这些是一些通用准则，
确保 UI 的所有不同部分都有足够数量的垂直和水平约束。在屏幕中使用一个简单的 UILabel。它需要一个 x,y 位置 - 可以是 leading/top, center 属性，它需要一个大小定义 - 固定宽度和高度或对附近元素的约束。它需要明确定义的位置 - 大小组合才能由 auto-layout.
管理
如果你把translatesAutoresizingMaskIntoConstraints设置为NO，你的意思是组件不应该取frame,size已经设置为constraint要求。如果您想明确提及某些元素的框架或大小，请将其保留为“是”。
如果 contentview 的所有四个边都固定在 scrollview 上，并且 scrollview 的大小、位置定义为约束或框架，就足以使内容可滚动。
如果contentview的内容大小在不同的事件中动态变化，你可以将scrollview.contentsize显式设置为contentview.width和contentview.height。
此外，请查看 Apple 关于 AutoLayout 和 Scrollviews 的技术说明 this。