Autolayout布局九宫格

Autolayout纯代码布局九宫格

单行固定间隔排列：


固定间隔
-(void)buildViews {
    NSMutableArray *array = [NSMutableArray array];
    for (NSInteger i=0; i < 4; i++) {
        UIView *subView = [UIView new];
        subView.backgroundColor = [UIColor orangeColor];
        [self.view addSubview:subView];
        
        [array addObject:subView];
    }
    
    [self vfHLayoutViews:array  withFixedSpacing:20 leadSpacing:20 tailSpacing:20];
    [self vfVLayoutViews:array  withHeight:100 topSpacing:100];
    
}

水平布局设置

- (void)vfHLayoutViews:(NSArray*)views  withFixedSpacing:(CGFloat)fixedSpace leadSpacing:(CGFloat)leadSpacing tailSpacing:(CGFloat)tailSpacing{
    UIView *lastView = nil;
    UIView *supV = nil;
    NSInteger cout = views.count;
    if (cout < 1) {
        NSAssert(cout>0,@"views to distribute need to least one");
        return;
    }
    for (int i = 0; i < cout; i++) {
        UIView *subView = views[i];
        if (subView.translatesAutoresizingMaskIntoConstraints) {
            subView.translatesAutoresizingMaskIntoConstraints = NO;
        }
    
        if (lastView) {
            if (i==cout-1) {
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[lastView]-fixedSpace-[subView(==lastView)]-tailSpacing-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"fixedSpace":@(fixedSpace),@"tailSpacing":@(tailSpacing)} views:@{@"lastView":lastView,@"subView":subView}]];
                
            }else{
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[lastView]-fixedSpace-[subView(==lastView)]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"fixedSpace":@(fixedSpace)} views:@{@"lastView":lastView,@"subView":subView}]];
                
            }
            
        }else{
            supV = subView.superview;
            if (!supV) {
                NSCAssert(NO, @"no found the view of superview");
                return;
            }
            if (cout == 1) {
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leadSpacing-[subView]-tailSpacing-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"leadSpacing":@(leadSpacing),@"tailSpacing":@(tailSpacing)} views:@{@"subView":subView}]];
            }else{
               [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leadSpacing-[subView]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"leadSpacing":@(leadSpacing)} views:@{@"subView":subView}]];
            }
            
        }
        
        lastView = subView;
    }
    
}

垂直布局设置

- (void)vfVLayoutViews:(NSArray*)views withHeight:(CGFloat)height topSpacing:(CGFloat)topSpacing{
    NSInteger cout = views.count;
    UIView *supV = nil;
    for (int i = 0; i < cout; i++) {
        UIView *subView = views[i];
        if (subView.translatesAutoresizingMaskIntoConstraints) {
            subView.translatesAutoresizingMaskIntoConstraints = NO;
        }
        if (!supV) {
            supV = subView.superview;
            if (!supV) {
                NSCAssert(NO, @"no found the view of superview");
                return;
            }
        }
        [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-top-[subView(height)]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"height":@(height),@"top":@(topSpacing)} views:@{@"subView":subView}]];
    }
}

固定宽度设置：


20171114.png
-(void)buildViewsFixedWidth{
    NSMutableArray *array = [NSMutableArray array];
    for (NSInteger i=0; i < 5; i++) {
        UIView *subView = [UIView new];
        subView.backgroundColor = [UIColor colorWithHue:( arc4random() % 256 / 256.0 )
                                             saturation:( arc4random() % 128 / 256.0 ) + 0.5
                                             brightness:( arc4random() % 128 / 256.0 ) + 0.5
                                                  alpha:1];
        [self.view addSubview:subView];
        
        [array addObject:subView];
    }
    
    [self vfHLayoutViews:array  withFixedItemWidth:50 leadSpacing:20 tailSpacing:20];
    [self vfVLayoutViews:array  withHeight:100 topSpacing:100];
}

水平布局

- (void)vfHLayoutViews:(NSArray*)views  withFixedItemWidth:(CGFloat)fixedWidth leadSpacing:(CGFloat)leadSpacing tailSpacing:(CGFloat)tailSpacing{
    UIView *lastView = nil;
    UIView *supV = nil;
    NSInteger cout = views.count;
    if (cout < 1) {
        NSAssert(cout>0,@"views to distribute need to least one");
        return;
    }
    for (int i = 0; i < cout; i++) {
        UIView *subView = views[i];
        if (subView.translatesAutoresizingMaskIntoConstraints) {
            subView.translatesAutoresizingMaskIntoConstraints = NO;
        }
        if (lastView) {
            
            if (i==cout-1) {
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[subView(==lastView)]-tailSpacing-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"tailSpacing":@(tailSpacing)} views:@{@"lastView":lastView,@"subView":subView}]];
                
            }else{
                //
                CGFloat offset = (1-(i/((CGFloat)cout-1)))*(fixedWidth+leadSpacing)-i*tailSpacing/(((CGFloat)cout-1));
                
                [supV addConstraint:[NSLayoutConstraint constraintWithItem:subView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:lastView attribute:NSLayoutAttributeWidth multiplier:1.0 constant:0]];
                [supV addConstraint:[NSLayoutConstraint constraintWithItem:subView attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:supV attribute:NSLayoutAttributeRight multiplier:i/((CGFloat)cout-1) constant:offset]];
                
            }
            
        }else{
            supV = subView.superview;
            if (!supV) {
                NSCAssert(NO, @"no found the view of superview");
                return;
            }
            if (cout == 1) {
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[subView(fixedWidth)]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"fixedWidth":@(fixedWidth)} views:@{@"subView":subView}]];
                [supV addConstraint:[NSLayoutConstraint constraintWithItem:subView attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:supV attribute:NSLayoutAttributeCenterX multiplier:1.0 constant:0]];
            }else{
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leadSpacing-[subView(fixedWidth)]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"leadSpacing":@(leadSpacing),@"fixedWidth":@(fixedWidth)} views:@{@"subView":subView}]];
            }
        }
        
        lastView = subView;
        
    }
    
}

垂直布局和上面一样

下面开始布局有多行的九宫格：


9C7FE46A-1BFB-40DA-89FF-7B8F86C040FC.png
-(void)buildViewsCells {
    
    UIView *view = [UIView new];
    view.translatesAutoresizingMaskIntoConstraints = NO;
    view.backgroundColor = [UIColor yellowColor];
    [self.view addSubview:view];
    
    
    NSMutableArray *array = [NSMutableArray array];
    for (NSInteger i=0; i < 8; i++) {
        UILabel *subView = [UILabel new];
        subView.backgroundColor = [UIColor orangeColor];
        subView.textAlignment = NSTextAlignmentCenter;
        subView.text = [NSString stringWithFormat:@"%ld",i];
        [view addSubview:subView];
        
        [array addObject:subView];
    }
    
   [self layoutViews:array withColumns:3 hFixedSpacing:10 vFixedSpacing:20 fixedItemHeight:0 topSpacing:10 bottomSpacing:10 leadSpacing:10 tailSpacing:10];
    
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-20-[view]-20-|" options:0 metrics:@{} views:@{@"view":view}]];
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-100-[view]-200-|" options:0 metrics:@{} views:@{@"view":view}]];
    
    /*
     //动态获取自适应高度
    UIView *lastView = [self layoutViews:array withColumns:3 hFixedSpacing:10 vFixedSpacing:20 fixedItemHeight:100 topSpacing:10 bottomSpacing:10 leadSpacing:10 tailSpacing:10];
    
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-20-[view]-20-|" options:0 metrics:@{} views:@{@"view":view}]];
    [self.view addConstraint:[NSLayoutConstraint constraintWithItem:view attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeTop multiplier:1.0 constant:100]];
    [self.view addConstraint:[NSLayoutConstraint constraintWithItem:view attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:lastView attribute:NSLayoutAttributeBottom multiplier:1.0 constant:10]];
    */
    
}

刚开始都在一个方法里做的水平和垂直布局：

//如果高度大于0，则按照固定高度布局
- (UIView *)vfLayoutViews:(NSArray*)views withColumns:(NSInteger)columnsCout hFixedSpacing:(CGFloat)hFixedSpace vFixedSpacing:(CGFloat)vFixedSpace  fixedItemHeight:(CGFloat)fixedHeight topSpacing:(CGFloat)topSpacing bottomSpacing:(CGFloat)bottomSpacing leadSpacing:(CGFloat)leadSpacing tailSpacing:(CGFloat)tailSpacing {
    UIView *lastView = nil;
    UIView *rowFristView = nil;
    UIView *supV = nil;
    NSInteger cout = views.count;
    if (cout < 1) {
        NSAssert(cout>0,@"views to distribute need to least one");
        return nil;
    }
    
    NSInteger residue = columnsCout - cout%columnsCout;
    NSMutableArray *newViews = [NSMutableArray arrayWithArray:views];
    for (int k = 0; k<residue; k++) {
        UIView *tempView = [UIView new];
        tempView.backgroundColor = [UIColor clearColor];
        [newViews addObject:tempView];
    }
    cout = newViews.count;
    NSInteger totalRows = cout/columnsCout;
    
    for (int i = 0; i < cout; i++) {
        UIView *subView = newViews[i];
        if (subView.translatesAutoresizingMaskIntoConstraints) {
            subView.translatesAutoresizingMaskIntoConstraints = NO;
        }
        NSInteger row = i/columnsCout;
        NSInteger column = i%columnsCout;
        if (lastView) {
            if (!subView.superview) {
                [supV addSubview:subView];
            }
            if (columnsCout == 1) {
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leadSpacing-[subView]-tailSpacing-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"leadSpacing":@(leadSpacing),@"tailSpacing":@(tailSpacing)} views:@{@"subView":subView}]];
            }else{
                if (column == columnsCout - 1) {
                    [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[lastView]-hFixedSpace-[subView(==lastView)]-tailSpacing-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"hFixedSpace":@(hFixedSpace),@"tailSpacing":@(tailSpacing)} views:@{@"lastView":lastView,@"subView":subView}]];
                    
                }else{
                    if (column == 0) {
                        [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leadSpacing-[subView]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"leadSpacing":@(leadSpacing)} views:@{@"subView":subView}]];
                    }else{
                        [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[lastView]-hFixedSpace-[subView(==lastView)]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"hFixedSpace":@(hFixedSpace)} views:@{@"lastView":lastView,@"subView":subView}]];
                    }
                    
                    
                }
                
            }
            
            if (column == 0) {
                if (row == totalRows - 1) {
                    if (fixedHeight > 0) {
                        [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[rowFristView]-vFixedSpace-[subView(==rowFristView)]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"vFixedSpace":@(vFixedSpace)} views:@{@"subView":subView,@"rowFristView":rowFristView}]];
                    }else{
                        [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[rowFristView]-vFixedSpace-[subView(==rowFristView)]-bottomSpacing-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"vFixedSpace":@(vFixedSpace),@"bottomSpacing":@(bottomSpacing)} views:@{@"subView":subView,@"rowFristView":rowFristView}]];
                    }
                    
                }else{
                    
                    [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[rowFristView]-vFixedSpace-[subView(==rowFristView)]" options:NSLayoutFormatDirectionLeftToRight metrics:@{@"vFixedSpace":@(vFixedSpace)} views:@{@"subView":subView,@"rowFristView":rowFristView}]];
                    
                }
                rowFristView = subView;
                
            }else{
                
                [supV addConstraint:[NSLayoutConstraint constraintWithItem:subView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:lastView attribute:NSLayoutAttributeTop multiplier:1.0 constant:0]];
                [supV addConstraint:[NSLayoutConstraint constraintWithItem:subView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:lastView attribute:NSLayoutAttributeHeight multiplier:1.0 constant:0]];
                
            }
            
            
        }else{
            supV = subView.superview;
            if (!supV) {
                NSCAssert(NO, @"no found the view of superview");
                return nil;
            }
            
            if (columnsCout == 1) {
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leadSpacing-[subView]-tailSpacing-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"leadSpacing":@(leadSpacing),@"tailSpacing":@(tailSpacing)} views:@{@"subView":subView}]];
            }else{
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leadSpacing-[subView]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"leadSpacing":@(leadSpacing)} views:@{@"subView":subView}]];
            }
            
            if (fixedHeight > 0) {
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-topSpacing-[subView(fixedHeight)]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"topSpacing":@(topSpacing),@"fixedHeight":@(fixedHeight)} views:@{@"subView":subView}]];
            }else{
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-topSpacing-[subView]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"topSpacing":@(topSpacing)} views:@{@"subView":subView}]];
            }
            
            rowFristView = subView;
        }
        
        lastView = subView;
        
    }
    
    return lastView;
    
}

这样看起来一个方法里代码太多了，于是把水平布局和垂直布局分离开来：

- (UIView *)layoutViews:(NSArray*)views withColumns:(NSInteger)columnsCout hFixedSpacing:(CGFloat)hFixedSpace vFixedSpacing:(CGFloat)vFixedSpace  fixedItemHeight:(CGFloat)fixedHeight topSpacing:(CGFloat)topSpacing bottomSpacing:(CGFloat)bottomSpacing leadSpacing:(CGFloat)leadSpacing tailSpacing:(CGFloat)tailSpacing {
    
    NSInteger cout = views.count;
    if (cout < 1) {
        NSAssert(cout>0,@"views to distribute need to least one");
        return nil;
    }
    
    NSInteger residue = columnsCout - cout%columnsCout;
    NSMutableArray *newViews = [NSMutableArray arrayWithArray:views];
    for (int k = 0; k<residue; k++) {
        UIView *tempView = [UIView new];
        tempView.backgroundColor = [UIColor clearColor];
        [newViews addObject:tempView];
    }
    
    zj_horizontalLayout(newViews, columnsCout, leadSpacing, tailSpacing, hFixedSpace);
    zj_verticalLayout(newViews, columnsCout, fixedHeight, topSpacing, bottomSpacing, vFixedSpace);
    
    return [newViews lastObject];
    
}

水平布局方案：

static void zj_horizontalLayout(NSArray *views, NSInteger columnsCout, CGFloat leadSpacing, CGFloat tailSpacing, CGFloat hFixedSpace) {
    UIView *lastView = nil;
    UIView *supV = nil;
    
    NSInteger cout = views.count;
    
    for (int i = 0; i < cout; i++) {
        UIView *subView = views[i];
        if (subView.translatesAutoresizingMaskIntoConstraints) {
            subView.translatesAutoresizingMaskIntoConstraints = NO;
        }
        NSInteger column = i%columnsCout;
        if (lastView) {
            if (!subView.superview) {
                [supV addSubview:subView];
            }
            if (columnsCout == 1) {
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leadSpacing-[subView]-tailSpacing-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"leadSpacing":@(leadSpacing),@"tailSpacing":@(tailSpacing)} views:@{@"subView":subView}]];
            }else{
                if (column == columnsCout - 1) {
                    [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[lastView]-hFixedSpace-[subView(==lastView)]-tailSpacing-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"hFixedSpace":@(hFixedSpace),@"tailSpacing":@(tailSpacing)} views:@{@"lastView":lastView,@"subView":subView}]];
                    
                }else{
                    if (column == 0) {
                        [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leadSpacing-[subView]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"leadSpacing":@(leadSpacing)} views:@{@"subView":subView}]];
                    }else{
                        [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[lastView]-hFixedSpace-[subView(==lastView)]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"hFixedSpace":@(hFixedSpace)} views:@{@"lastView":lastView,@"subView":subView}]];
                    }
                    
                    
                }
                
            }
            
            
        }else{
            supV = subView.superview;
            if (!supV) {
                NSCAssert(NO, @"no found the view of superview");
                return ;
            }
            
            if (columnsCout == 1) {
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leadSpacing-[subView]-tailSpacing-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"leadSpacing":@(leadSpacing),@"tailSpacing":@(tailSpacing)} views:@{@"subView":subView}]];
            }else{
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leadSpacing-[subView]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"leadSpacing":@(leadSpacing)} views:@{@"subView":subView}]];
            }
            
        }
        
        lastView = subView;
        
    }
}

垂直布局方案：

static void zj_verticalLayout(NSArray *views, NSInteger columnsCout,CGFloat fixedHeight,CGFloat topSpacing,CGFloat bottomSpacing,CGFloat vFixedSpace) {
    UIView *lastView = nil;
    UIView *supV = nil;
    UIView *rowFristView = nil;
    NSInteger cout = views.count;
    NSInteger totalRows = cout/columnsCout;
    
    for (int i = 0; i < cout; i++) {
        UIView *subView = views[i];
        if (subView.translatesAutoresizingMaskIntoConstraints) {
            subView.translatesAutoresizingMaskIntoConstraints = NO;
        }
        NSInteger row = i/columnsCout;
        NSInteger column = i%columnsCout;
        if (lastView) {
            if (!subView.superview) {
                [supV addSubview:subView];
            }
            
            if (column == 0) {
                if (row == totalRows - 1) {
                    if (fixedHeight > 0) {
                        [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[rowFristView]-vFixedSpace-[subView(==rowFristView)]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"vFixedSpace":@(vFixedSpace)} views:@{@"subView":subView,@"rowFristView":rowFristView}]];
                    }else{
                        [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[rowFristView]-vFixedSpace-[subView(==rowFristView)]-bottomSpacing-|" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"vFixedSpace":@(vFixedSpace),@"bottomSpacing":@(bottomSpacing)} views:@{@"subView":subView,@"rowFristView":rowFristView}]];
                    }
                    
                }else{
                    
                    [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[rowFristView]-vFixedSpace-[subView(==rowFristView)]" options:NSLayoutFormatDirectionLeftToRight metrics:@{@"vFixedSpace":@(vFixedSpace)} views:@{@"subView":subView,@"rowFristView":rowFristView}]];
                    
                }
                rowFristView = subView;
                
            }else{
                
                [supV addConstraint:[NSLayoutConstraint constraintWithItem:subView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:lastView attribute:NSLayoutAttributeTop multiplier:1.0 constant:0]];
                [supV addConstraint:[NSLayoutConstraint constraintWithItem:subView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:lastView attribute:NSLayoutAttributeHeight multiplier:1.0 constant:0]];
                
            }
            
            
        }else{
            supV = subView.superview;
            if (!supV) {
                NSCAssert(NO, @"no found the view of superview");
                return ;
            }
            
            if (fixedHeight > 0) {
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-topSpacing-[subView(fixedHeight)]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"topSpacing":@(topSpacing),@"fixedHeight":@(fixedHeight)} views:@{@"subView":subView}]];
            }else{
                [supV addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-topSpacing-[subView]" options:NSLayoutFormatDirectionLeadingToTrailing metrics:@{@"topSpacing":@(topSpacing)} views:@{@"subView":subView}]];
            }
            
            rowFristView = subView;
        }
        
        lastView = subView;
        
    }
    
}

到这里先告一段落！

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