如何优化在VFL自动布局中编写的代码

Question

我有一个UIView，在其中我创建了不带for loop并使用VFL的UILabels。它运行得很好，但代码可读性很差。甚至我不明白如何使用for循环来创建这些标签。我必须将高度设置为30，这是我不想要的。我想让它长出automatically。此外，我正在将subcontentView height常量设置为硬编码constantHeightSubContentView.constant = 250;我不想使用UIStackView。这是我尝试过的代码：

-(void)createProfileView{
if (ProfileView == nil) {
    ProfileView = [[UIView alloc] init];
    [ProfileView setTranslatesAutoresizingMaskIntoConstraints:NO];
    [ProfileView setBackgroundColor:[UIColor yellowColor]];
    [subContentView addSubview:ProfileView];
    views[@"ProfileView"] = ProfileView;
    NSArray* constraints;
    NSString* format;
    format = @"|[ProfileView]|";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [subContentView addConstraints:constraints];
    format = @"V:|-50-[ProfileView]|";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [subContentView addConstraints:constraints];
    //create labels
    //homeTown
    UILabel *lblHomeTown = [self getLabel];
    [lblHomeTown setBackgroundColor:[UIColor greenColor]];
    [lblHomeTown setText:@"Hometown:"];
    [ProfileView addSubview:lblHomeTown];
    views[@"lblHomeTown"] = lblHomeTown;
    UILabel *lblHomeTownDetail = [self getLabel];
    [lblHomeTownDetail setBackgroundColor:[UIColor grayColor]];
    [lblHomeTownDetail setText:self.player.homeTown];
    [ProfileView addSubview:lblHomeTownDetail];
    views[@"lblHomeTownDetail"] = lblHomeTownDetail;
    format = @"|-10-[lblHomeTown]-2-[lblHomeTownDetail]";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [ProfileView addConstraints:constraints];
    format = @"V:[lblHomeTown(30)]";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [ProfileView addConstraints:constraints];
    format = @"V:|[lblHomeTownDetail(30)]";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [ProfileView addConstraints:constraints];
    //hometown
    //highSchool
    //create labels
    UILabel *lblHighSchool = [self getLabel];
    [lblHighSchool setBackgroundColor:[UIColor magentaColor]];
    [lblHighSchool setText:@"High School:"];
    [ProfileView addSubview:lblHighSchool];
    views[@"lblHighSchool"] = lblHighSchool;
    UILabel *lblHighSchoolDetail = [self getLabel];
    [lblHighSchoolDetail setBackgroundColor:[UIColor redColor]];
    [lblHighSchoolDetail setText:self.player.highSchool];
    [ProfileView addSubview:lblHighSchoolDetail];
    views[@"lblHighSchoolDetail"] = lblHighSchoolDetail;
    format = @"|-10-[lblHighSchool]-2-[lblHighSchoolDetail]";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [ProfileView addConstraints:constraints];
    format = @"V:|[lblHomeTown(30)]-10-[lblHighSchool(30)]";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [ProfileView addConstraints:constraints];
    format = @"V:|[lblHomeTown(30)]-10-[lblHighSchoolDetail(30)]";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [ProfileView addConstraints:constraints];
    //highschool

    //experience
    UILabel *lblExperience = [self getLabel];
    [lblExperience setText:@"Experience:"];
    [ProfileView addSubview:lblExperience];
    views[@"lblExperience"] = lblExperience;
    UILabel *lblExperienceDetail = [self getLabel];
    [lblExperienceDetail setText:self.player.experience];
    [ProfileView addSubview:lblExperienceDetail];
    views[@"lblExperienceDetail"] = lblExperienceDetail;
    format = @"|-10-[lblExperience]-2-[lblExperienceDetail]";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [ProfileView addConstraints:constraints];
    format = @"V:[lblHighSchool(30)]-10-[lblExperience(30)]";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [ProfileView addConstraints:constraints];
    format = @"V:[lblHighSchool(30)]-10-[lblExperienceDetail(30)]";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [ProfileView addConstraints:constraints];
     //experience
    //description
    UILabel *lblDescription = [self getLabel];
    [lblDescription setText:self.player.playerDescription];
    [ProfileView addSubview:lblDescription];
    views[@"lblDescription"] = lblDescription;
    format = @"|-10-[lblDescription]";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [ProfileView addConstraints:constraints];
    format = @"V:[lblExperience(30)]-10-[lblDescription]";
    constraints = [NSLayoutConstraint constraintsWithVisualFormat:format options:0 metrics:nil views:views];
    [ProfileView addConstraints:constraints];
    //description
}
constantHeightSubContentView.constant = 250;
[subContentView bringSubviewToFront:ProfileView];

}

-(UILabel *)getLabel{
UILabel *lbl = [[UILabel alloc] init];
[lbl setTranslatesAutoresizingMaskIntoConstraints:NO];
[lbl setBackgroundColor:[UIColor clearColor]];
[lbl setNumberOfLines:0];
[lbl setTextColor:[UIColor blackColor]];
[lbl setFont:[UIFont fontWithName:@"AppleSDGothicNeo-Regular" size:13.0f]];
lbl.lineBreakMode = NSLineBreakByWordWrapping;
return lbl;

}

Answer 1

惊人的答案https://stackoverflow.com/a/25898949/1612489，唯一的问题是您必须使用VFL来指定乘数值，而不是如答案中所示的接口生成器。但一旦你理解了所使用的逻辑，这应该很容易。