Ios 用于Scrollview的通用自动布局&；用户界面组件

我知道自动布局，但我是一个新的通用应用程序与自动布局。我在设置

约束到下图时遇到问题

你能告诉我如何设置通用应用程序的自动布局吗？我尝试使用“约束到边距”（Constraint to margin）并将前导、顶部和尾部空间固定到容器，但它不起作用。
我不知道自动布局，但下面的代码也可以。。我更喜欢代码中的约束，它更易于管理、修改和理解。。我已经在所有大小的设备上测试了以下内容

注意：您不必将所有内容都放在一个文件中。。创建不同的视图，并让每个视图处理各自的约束/布局

肖像：


景观：


实际上，自动布局在scrollview中的工作方式与在其他视图中不同。在滚动视图中，前导、尾随、顶部和底部约束构成了容器视图的超级视图（在本例中为滚动视图）定义的不是间距，而是“我的滚动视图应该滚动到该组件的左、右、顶部和底部的程度”

因此，要在滚动视图中使用autolayout，您必须做一些棘手的事情：

设置从滚动视图到视图的前导、尾随、顶部和底部约束

向scrollview添加一个子视图，您将使用该子视图作为向导视图。由于scrollview的宽度随设备的不同而变化，因此您需要一个与scrollview的宽度相关的视图，因此您可以设置与该视图相关的约束，而不是scrollview的左右边框（因为这不会定义大小，而是“您的scrollview向左或向右滚动的程度”）。此视图的高度为0，位于0,0，宽度与scrollview相同


为该视图设置约束。高度=0。前导空间到容器，尾随空间到容器设置为0（这告诉您的scrollview不要滚动到导向视图的侧面）。也向scrollview添加顶部约束，因为向导视图将位于scrollview的顶部。另外，在scrollview和guide视图之间添加等宽关系（这非常重要，它将强制guide视图与scrollview具有相同的宽度，因此没有水平滚动可用）。注意，此时，您的scrollview知道它必须向左、向右和向上滚动多少，但不能向下滚动，因此您将在autolayout中看到一个错误

现在构建UI，考虑到顶部、左侧和右侧的关系必须放在与向导视图的关系中，而不是与滚动视图的关系中（您想要定义间距，而不是“滚动量”）。很难将所有需要的约束放在这里，因此我在github上创建了一个示例项目：
当您打开项目时，请注意，对象和scrollview之间的所有约束并不反映间距（如我所说），而是反映scrollview应该从组件滚动的距离

希望这有帮助

//
//  ViewController.m
//  test
//
//  Created by Brandon T on 2015-09-11.
//  Copyright (c) 2015 Brandon T. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
@property (nonatomic, strong) UIView *paleometerView;
@property (nonatomic, strong) UIView *maleometerView;
@property (nonatomic, strong) UIView *influenceView;
@property (nonatomic, strong) UIButton *letCompanyKnowButton;
@property (nonatomic, strong) UIButton *shareWithFriendsButton;
@end

@implementation ViewController

- (instancetype)init {
    if (self = [super init]) {
        [self initControls];
    }
    return self;
}

/*- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    if (self = [super initWithCoder:aDecoder]) {
        [self initControls];
    }
    return self;
}*/

/*- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
        [self initControls];
    }
    return self;
}*/

- (void)initControls {
    self.paleometerView = [[UIView alloc] init];
    self.maleometerView = [[UIView alloc] init];
    self.influenceView = [[UIView alloc] init];
    self.letCompanyKnowButton = [[UIButton alloc] init];
    self.shareWithFriendsButton = [[UIButton alloc] init];

    [self.paleometerView setBackgroundColor:[UIColor lightGrayColor]];
    [self.maleometerView setBackgroundColor:[UIColor grayColor]];

    [self.influenceView setBackgroundColor:[UIColor yellowColor]];
    [self.letCompanyKnowButton setBackgroundColor:[UIColor redColor]];
    [self.shareWithFriendsButton setBackgroundColor:[UIColor greenColor]];

    [self.view setBackgroundColor:[UIColor grayColor]];

    [self.letCompanyKnowButton setTitle:@"Let Company Know" forState:UIControlStateNormal];
    [self.shareWithFriendsButton setTitle:@"Share With Friends" forState:UIControlStateNormal];
}

- (void)viewDidLoad {
    [super viewDidLoad];


    [self initControls];

    [self layoutPaleMaleView];
    [self layoutInfluenceView];
    [self layoutAllViews];
}

- (void)layoutPaleMaleView {
    UILabel *paleLabel = [[UILabel alloc] init];
    UILabel *maleLabel = [[UILabel alloc] init];

    [paleLabel setText:@"Paleomenter\n85%\nPale"];
    [maleLabel setText:@"Maleometer\n71%\nMale"];

    [paleLabel setTextAlignment:NSTextAlignmentCenter];
    [maleLabel setTextAlignment:NSTextAlignmentCenter];

    [paleLabel setNumberOfLines:0];
    [maleLabel setNumberOfLines:0];

    [paleLabel setLineBreakMode:NSLineBreakByWordWrapping];
    [maleLabel setLineBreakMode:NSLineBreakByWordWrapping];

    [self.paleometerView addSubview:paleLabel];
    [self.maleometerView addSubview:maleLabel];

    [self.paleometerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-0-[pale]-0-|" options:0 metrics:nil views:@{@"pale":paleLabel}]];
    [self.paleometerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[pale]-0-|" options:0 metrics:nil views:@{@"pale":paleLabel}]];

    [self.maleometerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-0-[male]-0-|" options:0 metrics:nil views:@{@"male":maleLabel}]];
    [self.maleometerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[male]-0-|" options:0 metrics:nil views:@{@"male":maleLabel}]];

    [paleLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
    [maleLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
}

- (void)layoutInfluenceView {
    UIView *left = [[UIView alloc] init];
    UIView *middle = [[UIView alloc] init];
    UIView *right = [[UIView alloc] init];

    [left setBackgroundColor:[UIColor blueColor]];
    [middle setBackgroundColor:[UIColor yellowColor]];
    [right setBackgroundColor:[UIColor purpleColor]];

    [self.influenceView addSubview:left];
    [self.influenceView addSubview:middle];
    [self.influenceView addSubview:right];

    //Left, right and middle all have the same width.
    [self.influenceView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-0-[left(==middle)]-0-[middle(==right)]-0-[right(==left)]-0-|" options:0 metrics:nil views:@{@"left":left, @"middle":middle, @"right":right}]];

    [self.influenceView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[left]-0-|" options:0 metrics:nil views:@{@"left":left}]];

    [self.influenceView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[middle]-0-|" options:0 metrics:nil views:@{@"middle":middle}]];

    [self.influenceView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[right]-0-|" options:0 metrics:nil views:@{@"right":right}]];

    [left setTranslatesAutoresizingMaskIntoConstraints:NO];
    [middle setTranslatesAutoresizingMaskIntoConstraints:NO];
    [right setTranslatesAutoresizingMaskIntoConstraints:NO];
}

- (void)layoutAllViews {
    [self.view addSubview:self.paleometerView];
    [self.view addSubview:self.maleometerView];
    [self.view addSubview:self.influenceView];
    [self.view addSubview:self.letCompanyKnowButton];
    [self.view addSubview:self.shareWithFriendsButton];


    NSDictionary *views = @{@"paleometer":self.paleometerView, @"maleometer":self.maleometerView, @"influence":self.influenceView, @"letCompanyKnow":self.letCompanyKnowButton, @"share":self.shareWithFriendsButton};

    NSMutableArray *constraints = [[NSMutableArray alloc] init];

    //Constrain *Horizontally* Paleometer and Maleometer to be equal widths, 0 spacing from the left and 0 spacing from the right, with 0 spacing between them..
    [constraints addObject:@"H:|-0-[paleometer(==maleometer)]-0-[maleometer(==paleometer)]-0-|"];

    //Constrain *Horizontally* InfluenceView to be 0 spacing from the left and 0 spacing from the right.
    [constraints addObject:@"H:|-0-[influence]-0-|"];

    //Constrain *Horizontally* the "letCompanyKnowButton" with 20 spacing on the left and 20 spacing on the right..
    [constraints addObject:[NSString stringWithFormat:@"H:|-%d-[letCompanyKnow]-%d-|", 20, 20]];

    //Constrain *Horizontally* the "shareButton" with 20 spacing on the left and 20 spacing on the right..
    [constraints addObject:[NSString stringWithFormat:@"H:|-%d-[share]-%d-|", 20, 20]];

    //Constrain *Vertically* the paleometer with 0 spacing from the top and 150 in height.
    //Below it we have 0 spacing and then the influenceView which has a minimum height of 250 but is flexible so it will size to fit whenever needed.
    //Next we have another 20 spacing below the influenceView and the letCompanyKnow button which has a height of 50 and has a 20 spacing above and below it.
    //Finally the shareWithFriends button has the same height as the letCompanyKnow button.
    [constraints addObject:@"V:|-0-[paleometer(150)]-0-[influence(250@500)]-20-[letCompanyKnow(50)]-20-[share(==letCompanyKnow)]-20-|"];

    //Constrain *Vertically* the maleometer to be equal height with paleometer.
    [constraints addObject:@"V:[maleometer(==paleometer)]"];

    //Make influenceView flexible height for both shrinking and expanding vertically.
    [self.influenceView setContentCompressionResistancePriority:UILayoutPriorityDefaultHigh forAxis:UILayoutConstraintAxisVertical];
    [self.influenceView setContentHuggingPriority:UILayoutPriorityDefaultHigh forAxis:UILayoutConstraintAxisVertical];

    //add the constraints to the view.
    for (NSString *constraint in constraints) {
        [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:constraint options:0 metrics:nil views:views]];
    }

    for (UIView *view in self.view.subviews) {
        [view setTranslatesAutoresizingMaskIntoConstraints:NO];
    }
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end