我对编程很陌生。
屏幕有两个垂直列和3个框。如果右列的框比左侧少，则框将转到左侧列。每个方框都有几个子视图。 在我的代码中，“yearBOX”和“dayBOX”将转到左栏。问题是“dayBOX”只是重叠了yearBOX而不是下面的堆叠。我一直在检查文件并玩了大约10个小时，但找不到任何解决方案。欢迎使用Swift或Objective-C代码。我试图设置TopAnchord，但它没有用。非常感谢。
这是完整的代码：
已编辑：删除了一些未使用的行。并添加了一些关键代码来解决问题。
[boxStack.topAnchor constraintEqualToAnchor：dayBox.topAnchor] .active = YES; [dayBox.bottomAnchor constraintEqualToAnchor：boxStack.bottomAnchor] .active = YES; [boxStack.topAnchor constraintEqualToAnchor：dayBox.topAnchor] .active = YES; [dayBox.bottomAnchor constraintEqualToAnchor：boxStack.bottomAnchor] .active = YES;
- (void)viewDidLoad {
CGRect watchersRect = CGRectMake(0, 20, 320, 460);
UIView *colorLayer = [[UIView alloc]initWithFrame:watchersRect];
colorLayer.backgroundColor = [UIColor grayColor];
[self.view addSubview:colorLayer];
UIStackView *watchersUI = [[UIStackView alloc]init];
NSMutableArray *leftArr=[[NSMutableArray alloc]init];
NSMutableArray *rightArr=[[NSMutableArray alloc]init];
NSMutableArray *yearStackUIArr = [[NSMutableArray alloc]initWithObjects:@"year 1", @"year2",@"year3",@"year4",@"year5",nil];
NSMutableArray *monthStackUIArr = [[NSMutableArray alloc]initWithObjects:@"month 1", @"month 2",@"month 3",nil];
NSMutableArray *dayStackUIArr = [[NSMutableArray alloc]initWithObjects:@"day1", @"day2",@"day3",nil];
watchersUI = [[UIStackView alloc] initWithFrame:watchersRect];
watchersUI.axis= UILayoutConstraintAxisHorizontal;
watchersUI.distribution = UIStackViewDistributionFillEqually;
watchersUI.alignment = UIStackViewAlignmentFill;
watchersUI.spacing = 2;
watchersUI.translatesAutoresizingMaskIntoConstraints = YES;
[colorLayer addSubview:watchersUI];
UIView *leftColumn = [[UIView alloc] init];
[leftColumn setBackgroundColor:[UIColor yellowColor]];
UIView *rightColumn = [[UIView alloc]init];
[rightColumn setBackgroundColor:[UIColor redColor]];
[watchersUI addArrangedSubview:leftColumn];
[watchersUI addArrangedSubview:rightColumn];
[leftColumn.leftAnchor constraintEqualToAnchor:watchersUI.leftAnchor].active = YES;
[rightColumn.rightAnchor constraintEqualToAnchor:watchersUI.rightAnchor].active = YES;
[leftColumn.bottomAnchor constraintEqualToAnchor:watchersUI.bottomAnchor].active = YES;
[rightColumn.bottomAnchor constraintEqualToAnchor:watchersUI.bottomAnchor].active = YES;
UIStackView *leftStack =[[UIStackView alloc]init];
leftStack.axis = UILayoutConstraintAxisVertical;
leftStack.distribution = UIStackViewDistributionFillProportionally;
leftStack.alignment=UIStackViewAlignmentLeading;
leftStack.spacing =2;
leftStack.translatesAutoresizingMaskIntoConstraints = NO;
[leftColumn addSubview:leftStack];
[leftStack.leftAnchor constraintEqualToAnchor:leftColumn.leftAnchor].active =YES;
[leftStack.rightAnchor constraintEqualToAnchor:leftColumn.rightAnchor].active =YES;
UIStackView *rightStack =[[UIStackView alloc]init];
rightStack.axis = UILayoutConstraintAxisVertical;
rightStack.distribution = UIStackViewDistributionFillProportionally;
rightStack.alignment=UIStackViewAlignmentLeading;
rightStack.spacing =2;
rightStack.translatesAutoresizingMaskIntoConstraints = NO;
[rightColumn addSubview:rightStack];
[rightStack.leftAnchor constraintEqualToAnchor:rightColumn.leftAnchor].active =YES;
[rightStack.rightAnchor constraintEqualToAnchor:rightColumn.rightAnchor].active =YES;
UIView *monthBox=[[UIView alloc]init];
monthBox.backgroundColor =[UIColor blackColor];
UIView *yearBox=[[UIView alloc]init];
yearBox.backgroundColor = [UIColor purpleColor];
UIView *dayBox=[[UIView alloc]init];
dayBox.backgroundColor =[UIColor brownColor];
if ([yearStackUIArr count]>0) {
if ([rightArr count]<[leftArr count]) {
[rightStack addArrangedSubview:yearBox];
[rightArr addObject:yearBox];
[yearBox.topAnchor constraintEqualToAnchor:rightColumn.topAnchor].active = YES;
[yearBox.leftAnchor constraintEqualToAnchor:rightColumn.leftAnchor].active = YES;
[yearBox.rightAnchor constraintEqualToAnchor:rightColumn.rightAnchor].active = YES;
}
else
{
[leftStack addArrangedSubview:yearBox];
[leftArr addObject:yearBox];
for (UIView *subs in leftStack.subviews) {
NSLog(@"yearBox leftStack %@",subs);
}
[yearBox.topAnchor constraintEqualToAnchor:leftColumn.topAnchor].active = YES;
[yearBox.leftAnchor constraintEqualToAnchor:leftColumn.leftAnchor].active = YES;
[yearBox.rightAnchor constraintEqualToAnchor:leftColumn.rightAnchor].active = YES;
}
UIStackView *boxStack = [[UIStackView alloc]init];
boxStack.axis = UILayoutConstraintAxisVertical;
boxStack.distribution = UIStackViewDistributionFillEqually;
boxStack.alignment=UIStackViewAlignmentLeading;
boxStack.spacing=1;
boxStack.translatesAutoresizingMaskIntoConstraints = NO;
for (NSString *innerItem in yearStackUIArr) {
UILabel *innerView = [[UILabel alloc]init];
[boxStack addArrangedSubview:innerView];
[innerView.leftAnchor constraintEqualToAnchor:boxStack.leftAnchor].active =YES;
[innerView.rightAnchor constraintEqualToAnchor:boxStack.rightAnchor].active =YES;
[innerView.heightAnchor constraintGreaterThanOrEqualToConstant:20].active =YES;
innerView.backgroundColor =[UIColor cyanColor];
innerView.text = innerItem;
innerView.font = [UIFont systemFontOfSize:10];
}
[yearBox addSubview:boxStack];
[boxStack.leftAnchor constraintEqualToAnchor:yearBox.leftAnchor].active = YES;
[boxStack.rightAnchor constraintEqualToAnchor:yearBox.rightAnchor].active = YES;
[boxStack.topAnchor constraintEqualToAnchor:yearBox.topAnchor].active = YES;
[yearBox.bottomAnchor constraintEqualToAnchor:boxStack.bottomAnchor].active = YES;
}
if ([monthStackUIArr count]>0) {
if ([rightArr count]<[leftArr count]) {
[rightStack addArrangedSubview:monthBox];
[rightArr addObject:monthBox];
[monthBox.leftAnchor constraintEqualToAnchor:rightColumn.leftAnchor].active = YES;
[monthBox.rightAnchor constraintEqualToAnchor:rightColumn.rightAnchor].active = YES;
}
else
{
[leftStack addArrangedSubview:monthBox];
[leftArr addObject:monthBox];
[monthBox.leftAnchor constraintEqualToAnchor:leftColumn.leftAnchor].active = YES;
[monthBox.rightAnchor constraintEqualToAnchor:leftColumn.rightAnchor].active = YES;
}
UIStackView *boxStack = [[UIStackView alloc]init];
boxStack.axis = UILayoutConstraintAxisVertical;
boxStack.distribution = UIStackViewDistributionFillEqually;
boxStack.alignment=UIStackViewAlignmentLeading;
boxStack.spacing=2;
boxStack.translatesAutoresizingMaskIntoConstraints = NO;
for (NSString *innerItem in monthStackUIArr) {
UILabel *innerView = [[UILabel alloc]init];
[boxStack addArrangedSubview:innerView];
[innerView.leftAnchor constraintEqualToAnchor:boxStack.leftAnchor].active =YES;
[innerView.rightAnchor constraintEqualToAnchor:boxStack.rightAnchor].active =YES;
[innerView.heightAnchor constraintGreaterThanOrEqualToConstant:20].active =YES;
innerView.backgroundColor =[UIColor whiteColor];
innerView.text = innerItem;
innerView.font = [UIFont systemFontOfSize:10];
}
[monthBox addSubview:boxStack];
[boxStack.leftAnchor constraintEqualToAnchor:monthBox.leftAnchor].active = YES;
[boxStack.rightAnchor constraintEqualToAnchor:monthBox.rightAnchor].active = YES;
[boxStack.topAnchor constraintEqualToAnchor:monthBox.topAnchor].active=YES;
[monthBox.bottomAnchor constraintEqualToAnchor:boxStack.bottomAnchor].active = YES;
}
if ([dayStackUIArr count]>0) {
if ([rightArr count]<[leftArr count]) {
[rightStack addArrangedSubview:dayBox];
[rightArr addObject:dayBox];
[dayBox.leftAnchor constraintEqualToAnchor:rightColumn.leftAnchor].active = YES;
[dayBox.rightAnchor constraintEqualToAnchor:rightColumn.rightAnchor].active = YES;
}
else
{
[leftStack addArrangedSubview:dayBox];
[leftArr addObject:dayBox];
[dayBox.leftAnchor constraintEqualToAnchor:leftColumn.leftAnchor].active = YES;
[dayBox.rightAnchor constraintEqualToAnchor:leftColumn.rightAnchor].active = YES;
}
UIStackView *boxStack = [[UIStackView alloc]init];
boxStack.axis = UILayoutConstraintAxisVertical;
boxStack.distribution = UIStackViewDistributionFillEqually;
boxStack.alignment=UIStackViewAlignmentLeading;
boxStack.spacing=2;
boxStack.translatesAutoresizingMaskIntoConstraints = NO;
[dayBox addSubview:boxStack];
for (NSString *innerItem in dayStackUIArr) {
UILabel *innerView = [[UILabel alloc]init];
[boxStack addArrangedSubview:innerView];
[innerView.leftAnchor constraintEqualToAnchor:boxStack.leftAnchor].active =YES;
[innerView.rightAnchor constraintEqualToAnchor:boxStack.rightAnchor].active =YES;
[innerView.heightAnchor constraintGreaterThanOrEqualToConstant:20].active =YES;
innerView.backgroundColor =[UIColor blueColor];
innerView.text = innerItem;
innerView.font = [UIFont systemFontOfSize:10];
}
[boxStack.leftAnchor constraintEqualToAnchor:dayBox.leftAnchor].active = YES;
[boxStack.rightAnchor constraintEqualToAnchor:dayBox.rightAnchor].active = YES;
[boxStack.topAnchor constraintEqualToAnchor:dayBox.topAnchor].active=YES;
[dayBox.bottomAnchor constraintEqualToAnchor:boxStack.bottomAnchor].active = YES;
}
}
}