iOS Masonry九宫格布局 - 一行代码实现九宫格
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如何使用Masonry实现的九宫格布局函数?怎么才能一句代码就搞定九宫格布局?
跟随这篇文章走出九宫格的困境,让你不再为九宫格布局的代码感到烦心,让你抛弃使用CollectionView。
直接上效果图:
以上三张图片的九宫格布局,皆由一句代码完成:
#import "Masonry.h" @implementation UIColor (Extensions) + (instancetype)randomColor { CGFloat red = arc4random_uniform(255) / 255.0; CGFloat green = arc4random_uniform(255) / 255.0; CGFloat blue = arc4random_uniform(255) / 255.0; return [self colorWithRed:red green:green blue:blue alpha:1.0]; } @end @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // 创建一个装载九宫格的容器 UIView *containerView = [[UIView alloc] init]; [self.view addSubview:containerView]; containerView.backgroundColor = [UIColor whiteColor]; containerView.layer.borderWidth = 1; containerView.layer.borderColor = [UIColor grayColor].CGColor;
// 给该容器添加布局代码 [containerView makeConstraints:^(MASConstraintMaker *make) { make.left.equalTo(15); make.top.equalTo(66); make.right.equalTo(-15); make.height.equalTo(300); }]; // 为该容器添加宫格View for (int i = 0; i < 10; i++) { UIView *view = [[UIView alloc] init]; view.backgroundColor = [UIColor randomColor]; [containerView addSubview:view]; } // 执行九宫格布局 [containerView.subviews mas_distributeSudokuViewsWithFixedItemWidth:0 fixedItemHeight:0 fixedLineSpacing:10 fixedInteritemSpacing:20 warpCount:3 topSpacing:10 bottomSpacing:10 leadSpacing:10 tailSpacing:10]; } @end
该方法追求极简的方式实现九宫格布局,只需要一行代码,就能让你实现上图的九宫格布局
-[NSArray mas_distributeSudokuViewsWithFixedItemWidth:fixedItemHeight:fixedLineSpacing:fixedInteritemSpacing:warpCount:topSpacing:bottomSpacing:leadSpacing:tailSpacing:]
首先我来说说该方法的介个参数:
fixedItemWidth: 宫格的宽度,如果设置为0的话,则由父容器控制宽度,如果不为零,则可以控制父容器的宽度
fixedItemHeight:与fixedItemWidth同理
fixedLineSpacing:宫格之间行的间距,如果宫格只有一行,则不生效
fixedInteritemSpacing:宫格之间列的间距,如果只有一列,则不生效
warpCount:折行的位置,如果设置为3,则表示该九宫格需要布局3列,值得一提的是,如果NSArray本身的count如果小于warpCount,则该函数会用空的UIView填充到缺失区域。
topSpacing:bottomSpacing:leadSpacing:tailSpacing:九宫格顶边距,底边距,左边距以及右边距,不多说
接下来上实现代码:
- (MAS_VIEW *)star_commonSuperviewOfViews {
if (self.count == 1) {
return ((MAS_VIEW *)self.firstObject).superview;
}
MAS_VIEW *commonSuperview = nil;
MAS_VIEW *previousView = nil;
for (id object in self) {
if ([object isKindOfClass:[MAS_VIEW class]]) {
MAS_VIEW *view = (MAS_VIEW *)object;
if (previousView) {
commonSuperview = [view mas_closestCommonSuperview:commonSuperview];
} else {
commonSuperview = view;
}
previousView = view;
}
}
NSAssert(commonSuperview, @"Can't constrain views that do not share a common superview. Make sure that all the views in this array have been added into the same view hierarchy.");
return commonSuperview;
}
/**
* 九宫格布局 固定ItemSize 固定ItemSpacing
* 可由九宫格的内容控制SuperView的大小
* 如果warpCount大于[self count],该方法将会用空白的View填充到superview中
*
* @param fixedItemWidth 固定宽度,如果设置成0,则表示自适应
* @param fixedItemHeight 固定高度,如果设置成0,则表示自适应
* @param fixedLineSpacing 行间距
* @param fixedInteritemSpacing 列间距
* @param warpCount 折行点
* @param topSpacing 顶间距
* @param bottomSpacing 底间距
* @param leadSpacing 左间距
* @param tailSpacing 右间距
*
* @return 一般情况下会返回[self copy], 如果warpCount大于[self count],则会返回一个被空白view填充过的数组,可以让你循环调用removeFromSuperview或者干一些其他的事情;
*/
- (NSArray *)mas_distributeSudokuViewsWithFixedItemWidth:(CGFloat)fixedItemWidth fixedItemHeight:(CGFloat)fixedItemHeight fixedLineSpacing:(CGFloat)fixedLineSpacing fixedInteritemSpacing:(CGFloat)fixedInteritemSpacing warpCount:(NSInteger)warpCount topSpacing:(CGFloat)topSpacing bottomSpacing:(CGFloat)bottomSpacing leadSpacing:(CGFloat)leadSpacing tailSpacing:(CGFloat)tailSpacing { if (self.count < 1) { return self.copy; } if (warpCount < 1) { NSAssert(false, @"warp count need to bigger than zero"); return self.copy; } MAS_VIEW *tempSuperView = [self star_commonSuperviewOfViews]; NSArray *tempViews = self.copy; if (warpCount > self.count) { for (int i = 0; i < warpCount - self.count; i++) { MAS_VIEW *tempView = [[MAS_VIEW alloc] init]; [tempSuperView addSubview:tempView]; tempViews = [tempViews arrayByAddingObject:tempView]; } } NSInteger columnCount = warpCount; NSInteger rowCount = tempViews.count % columnCount == 0 ? tempViews.count / columnCount : tempViews.count / columnCount + 1; MAS_VIEW *prev; for (int i = 0; i < tempViews.count; i++) { MAS_VIEW *v = tempViews[i]; NSInteger currentRow = i / columnCount; NSInteger currentColumn = i % columnCount; [v mas_makeConstraints:^(MASConstraintMaker *make) { if (prev) { // 固定宽度 make.width.equalTo(prev); make.height.equalTo(prev); } else { // 如果写的item高宽分别是0,则表示自适应 if (fixedItemWidth) { make.width.equalTo(@(fixedItemWidth)); } if (fixedItemHeight) { make.height.equalTo(@(fixedItemHeight)); } } // 第一行 if (currentRow == 0) { make.top.equalTo(tempSuperView).offset(topSpacing); } // 最后一行 if (currentRow == rowCount - 1) { // 如果只有一行 if (currentRow != 0 && i-columnCount >= 0) { make.top.equalTo(((MAS_VIEW *)tempViews[i-columnCount]).mas_bottom).offset(fixedLineSpacing); } make.bottom.equalTo(tempSuperView).offset(-bottomSpacing); } // 中间的若干行 if (currentRow != 0 && currentRow != rowCount - 1) { make.top.equalTo(((MAS_VIEW *)tempViews[i-columnCount]).mas_bottom).offset(fixedLineSpacing); } // 第一列 if (currentColumn == 0) { make.left.equalTo(tempSuperView).offset(leadSpacing); } // 最后一列 if (currentColumn == columnCount - 1) { // 如果只有一列 if (currentColumn != 0) { make.left.equalTo(prev.mas_right).offset(fixedInteritemSpacing); } make.right.equalTo(tempSuperView).offset(-tailSpacing); } // 中间若干列 if (currentColumn != 0 && currentColumn != warpCount - 1) { make.left.equalTo(prev.mas_right).offset(fixedInteritemSpacing); } }]; prev = v; } return tempViews; }
当然这种九宫格布局的方式还是不能够满足你们
接下来看另外一种布局方式:
这种布局方法以父容器的大小为基准,宫格大小固定不变,宫格之间互相间距无约束,使用方法和上图类似
[containerView.subviews mas_distributeSudokuViewsWithFixedItemWidth:50 fixedItemHeight:50 warpCount:3 topSpacing:10 bottomSpacing:10 leadSpacing:10 tailSpacing:10];
上实现代码:
/** * 九宫格布局 固定ItemSize 可变ItemSpacing * * @param fixedItemWidth 固定宽度 * @param fixedItemHeight 固定高度 * @param warpCount 折行点 * @param topSpacing 顶间距 * @param bottomSpacing 底间距 * @param leadSpacing 左间距 * @param tailSpacing 右间距 */ - (void)mas_distributeSudokuViewsWithFixedItemWidth:(CGFloat)fixedItemWidth fixedItemHeight:(CGFloat)fixedItemHeight warpCount:(NSInteger)warpCount topSpacing:(CGFloat)topSpacing bottomSpacing:(CGFloat)bottomSpacing leadSpacing:(CGFloat)leadSpacing tailSpacing:(CGFloat)tailSpacing { if (self.count < 2) { NSAssert(self.count>1,@"views to distribute need to bigger than one"); return; } if (warpCount < 1) { NSAssert(false, @"warp count need to bigger than zero"); return; } MAS_VIEW *tempSuperView = [self star_commonSuperviewOfViews]; NSInteger rowCount = self.count % warpCount == 0 ? self.count / warpCount : self.count / warpCount + 1; MAS_VIEW *prev; for (int i = 0; i < self.count; i++) { MAS_VIEW *v = self[i]; // 当前行 NSInteger currentRow = i / warpCount; // 当前列 NSInteger currentColumn = i % warpCount; [v mas_makeConstraints:^(MASConstraintMaker *make) { // 固定宽度 make.width.equalTo(@(fixedItemWidth)); make.height.equalTo(@(fixedItemHeight)); // 第一行 if (currentRow == 0) { make.top.equalTo(tempSuperView).offset(topSpacing); } // 最后一行 if (currentRow == rowCount - 1) { make.bottom.equalTo(tempSuperView).offset(-bottomSpacing); } // 中间的若干行 if (currentRow != 0 && currentRow != rowCount - 1){ CGFloat offset = (1-(currentRow/((CGFloat)rowCount-1)))*(fixedItemHeight+topSpacing)-currentRow*bottomSpacing/(((CGFloat)rowCount-1)); make.bottom.equalTo(tempSuperView).multipliedBy(currentRow/((CGFloat)rowCount-1)).offset(offset); } // 第一列 if (currentColumn == 0) { make.left.equalTo(tempSuperView).offset(leadSpacing); } // 最后一列 if (currentColumn == warpCount - 1) { make.right.equalTo(tempSuperView).offset(-tailSpacing); } // 中间若干列 if (currentColumn != 0 && currentColumn != warpCount - 1) { CGFloat offset = (1-(currentColumn/((CGFloat)warpCount-1)))*(fixedItemWidth+leadSpacing)-currentColumn*tailSpacing/(((CGFloat)warpCount-1)); make.right.equalTo(tempSuperView).multipliedBy(currentColumn/((CGFloat)warpCount-1)).offset(offset); } }]; prev = v; } }