关于自动scrollView自动布局(商城的搜索界面)

界面如下

C9682973-7E73-4676-81D6-95B80C0FE470.png

截得的图不太好动态图也不太好凑合看吧,首先分析一下这个界面,怎嘛实现
第一可以用collectionView来实现,用collectionView来实现重点在collectionView的布局类..
第二可以自己用scrollView上加button(前提button不是太多如果太多就用第一种方法实现因为collectionView 的cell可以重用)
我是用第二种方法写的......先分析一下,在说明我的思路
肯定要先写一个scrollView了在再scrollView上加上一个contentView. contentView的大小由里面的一堆按钮个决定(是不用一开始就确定scrollView的contentOfSize的他是被里面的按钮撑开的)这点是重点可以看一下串哥的博客http://adad184.com/2015/12/01/scrollview-under-autolayout/

里面按钮的布局思路就是先把第一个按钮布局好再布局第二个的时候判断后面的宽度是否能够放得下,能放得下就布局在第一个按钮后面,不能放的下就布局在上一个按钮下面...依次循环下去
下面也是重要的一步就是判断最后一个按钮(记得要写上最后一个按钮距离他的父视图下面的布局约束这样就把父视图contentView撑开了, contentView也会自动撑开scrollView).

下面就是代码具体实现
直接复制就好

//
//  ViewController.m
//  搜索界面
//
//  Created by 3D on 16/9/4.
//  Copyright © 2016年 3D. All rights reserved.
//
#define BT_HEIGHT 31
#define GAP_WIDTH 10
//获取屏幕 宽度、高度
#define SCREEN_WIDTH ([UIScreen   mainScreen].bounds.size.width)
#define SCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height)
#import "ViewController.h"
#import "Masonry.h"
@interface ViewController ()

@property (nonatomic, strong) NSArray* historyArr;
@property (nonatomic, strong) NSArray* storeArr;
@property (nonatomic, strong) NSArray* hotArr;
@property (nonatomic, strong) UIView *contentView;

@end

@implementation ViewController
{
CGFloat allBt_W;
UIButton *lastBT;
UILabel *nearLB;//最近搜索
UILabel *storeLB;//店铺搜索
}

- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
allBt_W = 0;

//    [self.navigationController.navigationBar addSubview:searchTextField];
//    searchTextField.frame = CGRectMake(43, 7, SCREEN_WIDTH*269/375, 30);
//    searchTextField.backgroundColor = [UIColor whiteColor];
//    NSString *placeholderString = @"查找宠物商品";
//    NSMutableAttributedString *placeholder = [[NSMutableAttributedString alloc]initWithString:placeholderString];
//    [placeholder addAttribute:NSFontAttributeName value:[[KDFont new] getF30Font] range:NSMakeRange(0, placeholderString.length)];
//    [placeholder addAttribute:NSForegroundColorAttributeName value:[KDColor getC3Color] range:NSMakeRange(0,placeholderString.length)];
//    searchTextField.tintColor = [KDColor getC3Color];
//    searchTextField.attributedPlaceholder = placeholder;
//    searchTextField.layer.cornerRadius = 5;
UIScrollView *scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT)];
[self.view addSubview:scrollView];
self.contentView = [UIView new];
[scrollView addSubview:self.contentView];
[_contentView mas_makeConstraints:^(MASConstraintMaker *make) {
    make.edges.mas_equalTo(0);
    make.width.mas_equalTo(SCREEN_WIDTH);
}];



self.historyArr = @[@"小泽玛利亚",@"苍井空",@"武藤兰",@"栋神",@"小泽玛利亚",@"苍井空",@"武藤兰",@"小泽玛利亚",@"苍井空",@"小泽玛利亚",@"苍井空",@"武藤兰",@"栋神",@"小泽玛利亚",@"苍井空",@"武藤兰",@"小泽玛利亚",@"苍井空"];
self.storeArr = @[@"武藤兰的情趣用品店",@"栋神的情趣用品店",@"小泽玛利亚的情趣用品店",@"苍井空的情趣用品店",@"武藤兰的情趣用品店",@"栋神的情趣用品店"];
//    _historyArr =  nil;
self.hotArr = @[@"狗粮",@"女朋友",@"狗粮",@"我要媳妇😭",@"虐狗",@"😭",@"虐狗",@"😭",@"狗粮",@"女朋友",@"虐狗",@"😭",@"狗粮",@"女朋友",@"狗粮",@"我要媳妇😭",@"虐狗",@"😭",@"虐狗",@"😭",@"狗粮",@"女朋友",@"虐狗",@"😭"];
//在调用下面三个方法的时候 要保证已经走了网络(三个数组经过网络请求初始化了)
[self creatHistoryUI:_historyArr];
[self creatStoreUI:_storeArr];
[self creatHotUI:_hotArr];

}

-(void)creatHistoryUI:(NSArray*)arr{
UILabel *nearSearchLB = [UILabel new];
nearLB = nearSearchLB;
nearSearchLB.font = [UIFont systemFontOfSize:14];
nearSearchLB.textColor = [UIColor grayColor];
nearSearchLB.text = @"最近搜索";
[self.contentView addSubview:nearSearchLB];
[nearSearchLB mas_makeConstraints:^(MASConstraintMaker *make) {
    make.left.mas_equalTo(16);
    make.top.mas_equalTo(64+20);
}];
UIImageView *imageView = [UIImageView new];
[self.contentView addSubview:imageView];
imageView.image = [UIImage imageNamed:@"icon_shanchu"];
[imageView mas_makeConstraints:^(MASConstraintMaker *make) {
    make.right.mas_equalTo(-16);
    make.top.mas_equalTo(64+20);
    make.width.height.mas_equalTo(14);
}];
if (arr==nil || arr.count == 0) {
    UILabel *noHistoryLB = [UILabel new];
    noHistoryLB.font = [UIFont systemFontOfSize:14];
    noHistoryLB.textColor = [UIColor grayColor];
    noHistoryLB.text = @"无历史搜索";
    [self.contentView addSubview:noHistoryLB];
    [noHistoryLB mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerX.mas_equalTo(0);
        make.top.mas_equalTo(imageView.mas_bottom).mas_equalTo(15);
    }];
}else{
    lastBT = nil;
    for (int i = 0; i<arr.count; i++) {
        UIButton *historyBT = [UIButton new];
        [historyBT addTarget:self action:@selector(butionClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.contentView addSubview:historyBT];
        historyBT.layer.cornerRadius = 2;
        historyBT.layer.borderColor = [UIColor grayColor].CGColor;
        historyBT.layer.borderWidth = 1;
        [historyBT setTitle:arr[i] forState:0];
        [historyBT setTitleColor:[UIColor grayColor] forState:0];
        historyBT.titleLabel.font = [UIFont systemFontOfSize:14];
        CGFloat historyBT_W = [self butionWidth:arr[i]];
        allBt_W = allBt_W+(historyBT_W+GAP_WIDTH);
        if (i==0) {
            [historyBT mas_makeConstraints:^(MASConstraintMaker *make) {
                make.top.mas_equalTo(nearSearchLB.mas_bottom).mas_equalTo(15);
                make.left.mas_equalTo(16);
                make.height.mas_equalTo(BT_HEIGHT);
                make.width.mas_equalTo(historyBT_W);
            }];
            lastBT = historyBT;
        }else{
            [historyBT mas_makeConstraints:^(MASConstraintMaker *make) {
                make.width.mas_equalTo(historyBT_W);
                make.height.mas_equalTo(BT_HEIGHT);
                if (SCREEN_WIDTH-allBt_W-16-6 >= 0) {//不换行
                    make.left.mas_equalTo(lastBT.mas_right).mas_equalTo(GAP_WIDTH);
                    make.top.mas_equalTo(lastBT);
                }else{
                    allBt_W = historyBT_W+GAP_WIDTH;
                    make.left.mas_equalTo(16);
                    make.top.mas_equalTo(lastBT.mas_bottom).mas_equalTo(GAP_WIDTH);
                }
            }];
            lastBT = historyBT;
        }
    }
}
}

-(void)creatStoreUI:(NSArray*)arr{
allBt_W = 0;
UILabel *shopSearchLB = [UILabel new];
storeLB = shopSearchLB;
shopSearchLB.font = [UIFont systemFontOfSize:14];
shopSearchLB.textColor = [UIColor grayColor];
shopSearchLB.text = @"店铺搜索";
[self.contentView addSubview:shopSearchLB];
[shopSearchLB mas_makeConstraints:^(MASConstraintMaker *make) {
    make.left.mas_equalTo(16);
    if (self.historyArr.count == 0 || self.historyArr == nil ) {
        make.top.mas_equalTo(nearLB.mas_bottom).mas_equalTo(66);
    }else{
        make.top.mas_equalTo(lastBT.mas_bottom).mas_equalTo(20);
    }
}];
if (arr==nil || arr.count == 0) {
    UILabel *noHistoryLB = [UILabel new];
    noHistoryLB.font = [UIFont systemFontOfSize:14];
    noHistoryLB.textColor = [UIColor orangeColor];
    noHistoryLB.text = @"no店铺搜索";
    [self.contentView addSubview:noHistoryLB];
    [noHistoryLB mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerX.mas_equalTo(0);
        make.top.mas_equalTo(shopSearchLB.mas_bottom).mas_equalTo(15);
    }];
}else{
    lastBT = nil;
    for (int i = 0; i<arr.count; i++) {
        UIButton *shopBT = [UIButton new];
        [shopBT addTarget:self action:@selector(butionClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.contentView addSubview:shopBT];
        shopBT.layer.cornerRadius = 2;
        shopBT.layer.borderColor = [UIColor grayColor].CGColor;
        shopBT.layer.borderWidth = 1;
        [shopBT setTitle:arr[i] forState:0];
        [shopBT setTitleColor:[UIColor grayColor] forState:0];
        shopBT.titleLabel.font = [UIFont systemFontOfSize:14];
        CGFloat shopBT_W = [self butionWidth:arr[i]];
        allBt_W = allBt_W+(shopBT_W+GAP_WIDTH);
        if (i==0) {
            [shopBT mas_makeConstraints:^(MASConstraintMaker *make) {
                make.top.mas_equalTo(shopSearchLB.mas_bottom).mas_equalTo(15);
                make.left.mas_equalTo(16);
                make.height.mas_equalTo(BT_HEIGHT);
                make.width.mas_equalTo(shopBT_W);
            }];
            lastBT = shopBT;
        }else{
            [shopBT mas_makeConstraints:^(MASConstraintMaker *make) {
                make.width.mas_equalTo(shopBT_W);
                make.height.mas_equalTo(BT_HEIGHT);
                if (SCREEN_WIDTH-allBt_W-16-6 >= 0) {//不换行
                    make.left.mas_equalTo(lastBT.mas_right).mas_equalTo(GAP_WIDTH);
                    make.top.mas_equalTo(lastBT);
                }else{
                    allBt_W = shopBT_W+GAP_WIDTH;
                    make.left.mas_equalTo(16);
                    make.top.mas_equalTo(lastBT.mas_bottom).mas_equalTo(GAP_WIDTH);
                }
            }];
            lastBT = shopBT;
        }
    }
}

}

-(void)creatHotUI:(NSArray*)arr{
allBt_W = 0;
UILabel *hotSearchLB = [UILabel new];
hotSearchLB.font = [UIFont systemFontOfSize:14];
hotSearchLB.textColor = [UIColor grayColor];
hotSearchLB.text = @"热门搜索";
[self.contentView addSubview:hotSearchLB];
[hotSearchLB mas_makeConstraints:^(MASConstraintMaker *make) {
    make.left.mas_equalTo(16);
    if (self.storeArr.count == 0 || self.storeArr == nil ) {
        make.top.mas_equalTo(storeLB.mas_bottom).mas_equalTo(66);
    }else{
        make.top.mas_equalTo(lastBT.mas_bottom).mas_equalTo(20);
    }
}];
if (arr==nil || arr.count == 0) {
    UILabel *noHotLB = [UILabel new];
    noHotLB.font = [UIFont systemFontOfSize:14];
    noHotLB.textColor = [UIColor grayColor];
    noHotLB.text = @"no热门搜索";
    [self.contentView addSubview:noHotLB];
    [noHotLB mas_makeConstraints:^(MASConstraintMaker *make) {
        make.centerX.mas_equalTo(0);
        make.top.mas_equalTo(hotSearchLB.mas_bottom).mas_equalTo(15);
        make.bottom.mas_equalTo(-44);
    }];
}else{
    lastBT = nil;
    for (int i = 0; i<arr.count; i++) {
        UIButton *hotBT = [UIButton new];
        [hotBT addTarget:self action:@selector(butionClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.contentView addSubview:hotBT];
        hotBT.layer.cornerRadius = 2;
        hotBT.layer.borderColor = [UIColor grayColor].CGColor;
        hotBT.layer.borderWidth = 1;
        [hotBT setTitle:arr[i] forState:0];
        [hotBT setTitleColor:[UIColor grayColor] forState:0];
        hotBT.titleLabel.font = [UIFont systemFontOfSize:14];
        CGFloat hotBT_W = [self butionWidth:arr[i]];
        allBt_W = allBt_W+(hotBT_W+GAP_WIDTH);
        if (i==0) {
            [hotBT mas_makeConstraints:^(MASConstraintMaker *make) {
                make.top.mas_equalTo(hotSearchLB.mas_bottom).mas_equalTo(15);
                make.left.mas_equalTo(16);
                make.height.mas_equalTo(BT_HEIGHT);
                make.width.mas_equalTo(hotBT_W);
            }];
            lastBT = hotBT;
        }else{
            if (i==arr.count-1) {
                [hotBT mas_makeConstraints:^(MASConstraintMaker *make) {
                    make.width.mas_equalTo(hotBT_W);
                    make.height.mas_equalTo(BT_HEIGHT);
                    if (SCREEN_WIDTH-allBt_W-16-6 >= 0) {//不换行
                        make.left.mas_equalTo(lastBT.mas_right).mas_equalTo(GAP_WIDTH);
                        make.top.mas_equalTo(lastBT);
                    }else{
                        allBt_W = hotBT_W+GAP_WIDTH;
                        make.left.mas_equalTo(16);
                        make.top.mas_equalTo(lastBT.mas_bottom).mas_equalTo(GAP_WIDTH);
                    }
                    make.bottom.mas_equalTo(-10);
                }];
                lastBT = nil;
            }else{
                [hotBT mas_makeConstraints:^(MASConstraintMaker *make) {
                    make.width.mas_equalTo(hotBT_W);
                    make.height.mas_equalTo(BT_HEIGHT);
                    if (SCREEN_WIDTH-allBt_W-16-6 >= 0) {//不换行
                        make.left.mas_equalTo(lastBT.mas_right).mas_equalTo(GAP_WIDTH);
                        make.top.mas_equalTo(lastBT);
                    }else{
                        allBt_W = hotBT_W;
                        make.left.mas_equalTo(16);
                        make.top.mas_equalTo(lastBT.mas_bottom).mas_equalTo(GAP_WIDTH);
                    }
                }];
                lastBT = hotBT;
            }
        }
    }
}

}

-(void)butionClick:(UIButton*)sender{

NSLog(@"semder.title = %@",sender.titleLabel.text);
}

-(CGFloat)butionWidth:(NSString *)title{

NSMutableDictionary *attributes = [NSMutableDictionary dictionary];    attributes[NSFontAttributeName] = [UIFont systemFontOfSize:14];
CGRect rect = [title boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, 13) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:attributes context:nil];
CGFloat butionW = rect.size.width+40;
return butionW;
}


- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end

2016-09-05 00_29_58.gif

最后编辑于：2017.12.04 02:52:21

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