SDAutoLayout是一款优秀的自动布局框架，大家或多或少对它有点了解，今天总结下它的基本使用方法，希望对大家能有点帮助
项目示例
1、基本布局
{
//1、填充一个和父视图一样的滚动视图
[self.view addSubview:self.listView];
self.listView.sd_layout
.spaceToSuperView(UIEdgeInsetsMake(0, 0, 0, 0));
//2、左、上20，长50，宽100
UIView *view1 = [UIView new];
view1.backgroundColor = UIColor.redColor;
[self.listView addSubview:view1];
view1.sd_layout
.topSpaceToView(self.listView, 20)
.leftSpaceToView(self.listView,20)
.heightIs(100)
.widthIs(200);
//3、长宽为view1一半，
UIView *view2 = [UIView new];
view2.backgroundColor = UIColor.greenColor;
[self.listView addSubview:view2];
view2.sd_layout
.heightRatioToView(view1,.5)
.widthRatioToView(view1,.5)
.centerYEqualToView(view1)
.centerXEqualToView(view1);
//4、距离view1为20，距离右侧屏幕20，顶部、高度和view一样
UIView *view3 = [UIView new];
view3.backgroundColor = UIColor.blueColor;
[self.listView addSubview:view3];
view3.sd_layout
.topEqualToView(view1)
.leftSpaceToView(view1, 20)
.rightSpaceToView(self.listView, 20)
.heightIs(view1.height_sd);
}
2、label的父视图根据label的高度自适应
{
UILabel *label1 = [UILabel new];
label1.text = @"这个label会根据这些文字内容高度自适应；\n而这个父view会根据label和view具体情况实现高度自适应。\nGot it! OH YAEH! 这个label会根据这些文字内容高度自适应；而这个父view会根据label和view具体情况实现高度自适应。\nGot it! OH YAEH!";
label1.backgroundColor = UIColor.whiteColor;
UILabel *label2 = UILabel.new;
label2.backgroundColor = UIColor.greenColor;
UIView *view4 = [UIView new];
view4.backgroundColor = UIColor.yellowColor;
[self.listView addSubview:view4];
[view4 sd_addSubviews:@[label1, label2]];
label1.sd_layout
.topSpaceToView(view4,20)
.leftSpaceToView(view4, 20)
.widthRatioToView(self.listView, .5)
.autoHeightRatio(0);
//设置文本内容自适应，如果这里的参数为大于0的数值则会以此数值作为view的高宽比设置view的高度
label2.sd_layout
.topEqualToView(label1)
.leftSpaceToView(label1, 20)
.rightSpaceToView(view4, 20)
.heightIs(60);
view4.sd_layout
.leftSpaceToView(self.listView,20)
.topSpaceToView(lastView, 20)
.rightSpaceToView(self.listView,20);
// [重点]设置view1高度根据子其内容自适应
[view4 setupAutoHeightWithBottomView:label1 bottomMargin:20];
}
3、label宽度自适应
{
UILabel *autoWidthlabel = [UILabel new];
autoWidthlabel.backgroundColor = randomColor;
autoWidthlabel.font = [UIFont systemFontOfSize:12];
autoWidthlabel.text = @"宽度自适应(最大宽度距离父view左、右边距20)宽度自适应(最大宽度距离父view左、右边距20)宽度自适应(最大宽度距离父view左、右边距20)";
[self.listView addSubview:autoWidthlabel];
autoWidthlabel.sd_layout
.topSpaceToView(lastView, 20)
.leftEqualToView(lastView)
.heightIs(20);
[autoWidthlabel setSingleLineAutoResizeWithMaxWidth:self.view.width - 20*2];
}
4、label高度自适应
{
UILabel *autoHeightlabel = [UILabel new];
autoHeightlabel.backgroundColor = randomColor;
autoHeightlabel.font = [UIFont systemFontOfSize:12];
autoHeightlabel.text = @"高度自适应(距离父view顶部左边距20，宽度为100)";
[self.listView addSubview:autoHeightlabel];
autoHeightlabel.sd_layout
.topSpaceToView(lastView, 20)
.leftEqualToView(lastView)
.widthRatioToView(lastView, .5)
.autoHeightRatio(0);
//设圆角
autoHeightlabel.sd_cornerRadius = @(5);
}
当然若你的控件是先加载控件，后填入内容就需要在重置内容后对控件进行重新布局：
[view updateLayout];
【注意】SDAutoLayout是延迟布局生效，不是你刚调用.sd_layout对控件进行布局后立即填充内容，它的宽度就是刚布局时的宽度。但是若控件已经加载出来，等大约1秒后你再对它赋值，那么你不对它重新布局，那么它显示的就是最开始的宽度。高度自适应也是如此。
//需要在旋转重新设置
- (void)viewDidLayoutSubviews{
[super viewDidLayoutSubviews];
[_autoWidthlabel setSingleLineAutoResizeWithMaxWidth:self.view.width - 20*2];
}
5、设置一排固定间距自动宽度子view
{
NSInteger count = 4;
CGFloat margin = 20;
//放button的父视图
UIView *autoWidthViewsContainer = [UIView new];
autoWidthViewsContainer.backgroundColor = [UIColor greenColor];
[self.listView addSubview:autoWidthViewsContainer];
NSMutableArray *temp = [NSMutableArray new];
for (int i = 0; i < count; i++) {
UIView *view = [UIView new];
view.backgroundColor = randomColor;
[autoWidthViewsContainer addSubview:view];
// 设置高度约束，长宽比
view.sd_layout.autoHeightRatio(.5);
view.sd_cornerRadius = @(5);
[temp addObject:view];
}
autoWidthViewsContainer.sd_layout
.leftSpaceToView(self.listView, 20)
.rightSpaceToView(self.listView,20)
.topSpaceToView(lastView,20);
// 此步设置之后autoWidthViewsContainer的高度可以根据子view自适应
[autoWidthViewsContainer setupAutoWidthFlowItems:[temp copy]
withPerRowItemsCount:count
verticalMargin:margin
horizontalMargin:margin
verticalEdgeInset:margin
horizontalEdgeInset:margin];
lastView = autoWidthViewsContainer;
}
6、设置一排固定宽度自动间距子view
{
NSInteger count = 4;
CGFloat margin = 20;
CGFloat itemWidth = (self.view.width_sd - 20*2 - (count - 1)*20)/count;
UIView *autoMarginViewsContainer = [UIView new];
autoMarginViewsContainer.backgroundColor = [UIColor lightGrayColor];
[self.listView addSubview:autoMarginViewsContainer];
NSMutableArray *temp = [NSMutableArray new];
for (int i =0; i < count; i++) {
UIView *view = [UIView new];
view.backgroundColor = randomColor;
[autoMarginViewsContainer addSubview:view];
view.sd_layout.autoHeightRatio(0.5);
view.sd_cornerRadius = @(5);
[temp addObject:view];
}
autoMarginViewsContainer.sd_layout
.leftSpaceToView(self.listView, 20)
.rightSpaceToView(self.listView, 20)
.topSpaceToView(lastView, 20);
//此步设置之后autoMarginViewsContainer的高度可以根据子view自适应
[autoMarginViewsContainer setupAutoMarginFlowItems:[temp copy] withPerRowItemsCount:count itemWidth:itemWidth verticalMargin:margin verticalEdgeInset:margin horizontalEdgeInset:margin];
lastView = autoMarginViewsContainer;
}
7、设置UIScrollView
- bottomView设置最后一个视图即可
[self.listView setupAutoContentSizeWithBottomView:lastView bottomMargin:20];
8、cell自定义高度
UITableView设置
- 设置行高
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
return [self.listTableView cellHeightForIndexPath:indexPath model:_itemList[indexPath.row] keyPath:@"title" cellClass:[SDTabelViewCell class] contentViewWidth:[self cellContentViewWith]];
}
- (CGFloat)cellContentViewWith{
CGFloat width = [UIScreen mainScreen].bounds.size.width;
// 适配ios7横屏
if ([UIApplication sharedApplication].statusBarOrientation != UIInterfaceOrientationPortrait && [[UIDevice currentDevice].systemVersion floatValue] < 8) {
width = [UIScreen mainScreen].bounds.size.height;
}
return width;
}
UITableViewCell设置
- 设置布局
self.titleLabel.sd_layout
.topSpaceToView(self.contentView, 20)
.leftSpaceToView(self.contentView, 20)
.widthRatioToView(self.contentView, .5)
.autoHeightRatio(0);
- 设置cell高度
[self setupAutoHeightWithBottomView:self.titleLabel bottomMargin:20];
总结
- 框架使用方便简单，链式设计值得参考
- 介绍了一些基本使用，还有很多方便的API值得大家挖掘，多看源码，多思考架构思想，让自己的代码写得更加精简
- 正在使用的朋友多交流经验技巧
以上均是自学过程的积累，学到哪记到哪
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