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屏幕摆放的控件有两种方式，一种根据具体内容变化，一种根据屏幕宽度变化。
下面我分别将两个方式，用代码的方式呈现：
1:根据具体内容变化
//
// StyleOneViewController.m
// buttonShow
//
// Created by limin on 15/06/15.
// Copyright © 2015年 信诺汇通信息科技(北京)有限公司. All rights reserved.
//
#import "StyleOneViewController.h"
#import "UIViewExt.h"
//每列间隔
#define KViewMargin 10
//每行列数高
#define KVieH 28
#define KscreenW [UIScreen mainScreen].bounds.size.width
#define Color(R,G,B) [UIColor colorWithRed:R/255.0 green:G/255.0 blue:B/255.0 alpha:1.0]
@interface StyleOneViewController ()
{
UIButton *tmpBtn;
CGFloat btnW;
CGFloat btnViewHeight;
}
/* 存放按钮的view */
@property(nonatomic,strong)UIView *btnsView;
/* 按钮上的文字 */
@property(nonatomic,strong)NSMutableArray *btnMsgArrays;
@property (nonatomic,strong) NSMutableArray* btnIDArrays;
/** 所有按钮 */
@property(nonatomic,strong)NSMutableArray *allBtnArrays;
/** 服务器提供按钮标签 */
@property(nonatomic,strong)NSArray *tagInfoArray;
//-------展示选中的文字
/* 确认按钮 */
@property(nonatomic,strong)UIButton *sureButton;
/* 文字 */
@property(nonatomic,strong)UILabel *showLabel;
@end
@implementation StyleOneViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
[self getTagMsg];
}
-(void)getTagMsg
{
self.btnMsgArrays = [[NSMutableArray alloc]init];
_allBtnArrays = [[NSMutableArray alloc]init];
self.btnIDArrays = [[NSMutableArray alloc]init];
self.tagInfoArray = @[@{@"id":@"1",@"tagmsg":@"味道很好味道很好"},
@{@"id":@"1",@"tagmsg":@"环境不错"},
@{@"id":@"1",@"tagmsg":@"性价比高"},
@{@"id":@"1",@"tagmsg":@"位置好找"},
@{@"id":@"1",@"tagmsg":@"上菜快"},
@{@"id":@"1",@"tagmsg":@"菜量足"},
@{@"id":@"1",@"tagmsg":@"好吃"},
@{@"id":@"1",@"tagmsg":@"态度好，服务周到"}
];
//挨个赋值
for (int i=0; i<_tagInfoArray.count; i++) {
NSDictionary *dict = _tagInfoArray[i];
[self.btnIDArrays addObject:dict[@"id"]];
[self.btnMsgArrays addObject:dict[@"tagmsg"]];
}
[self createBtns];
}
//创建按钮
-(void)createBtns{
//创建放置button的view
self.btnsView = [[UIView alloc]initWithFrame:CGRectMake(10, 40, KscreenW-2*KViewMargin, 40)];
self.btnsView.backgroundColor = Color(237, 237, 237);
[self.view addSubview:self.btnsView];
/**
* 数组存放适配屏幕大小的每行按钮的个数
*/
NSMutableArray *indexbtns=[self returnBtnsForRowAndCol];
//统计按钮View的高度
btnViewHeight=indexbtns.count*(KVieH+KViewMargin)+10;
//设置btnView的高度
self.btnsView.height=btnViewHeight;
NSInteger count=0;
CGFloat Y;
//循环创建按钮
for (int row=0; row<indexbtns.count; row++) {
for (int col=0; col<[indexbtns[row]intValue]; col++) {
CGFloat X;
Y=10+row*(KViewMargin+KVieH);
//按钮的宽
btnW=[self returnBtnWithWithStr:self.btnMsgArrays[count]];
if (tmpBtn&&col) {
X=CGRectGetMaxX(tmpBtn.frame)+KViewMargin;
}else{
X=KViewMargin+col*btnW;
}
UIButton *btn=[[UIButton alloc]initWithFrame:CGRectMake(X, Y, btnW, KVieH)];
[btn setTitle:self.btnMsgArrays[count] forState:UIControlStateNormal];
btn.titleLabel.font=[UIFont systemFontOfSize:12];
btn.layer.borderWidth=1;
btn.layer.borderColor = Color(156,156,156).CGColor;
[btn setTitleColor:Color(156, 156, 156) forState:UIControlStateNormal];
[btn setTitleColor:Color(202, 48, 130) forState:UIControlStateSelected];
btn.backgroundColor=[UIColor clearColor];
btn.layer.cornerRadius=2;
btn.tag=[self.btnIDArrays[count] integerValue];
[btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
[self.allBtnArrays addObject:btn];
tmpBtn=btn;
[self.btnsView addSubview:btn];
count+=1;
}
}
//创建确认按钮
UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(KViewMargin, self.btnsView.bottom+40, KscreenW-2*KViewMargin, 44)];
[btn setTitle:@"确认" forState:UIControlStateNormal];
[btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
btn.backgroundColor = Color(214, 116, 0);
[btn addTarget:self action:@selector(showSelectedClick:) forControlEvents:UIControlEventTouchUpInside];
self.sureButton = btn;
[self.view addSubview:btn];
//返回按钮
UIButton *btn2 = [[UIButton alloc]initWithFrame:CGRectMake((KscreenW-80)*0.5, self.view.height-80, 80, 80)];
[btn2 setTitle:@"返回" forState:UIControlStateNormal];
[btn2 setTitleColor:[UIColor purpleColor] forState:UIControlStateNormal];
btn2.layer.cornerRadius = 40;
btn2.clipsToBounds = YES;
btn2.layer.borderColor = [UIColor purpleColor].CGColor;
btn2.layer.borderWidth = 2;
[btn2 addTarget:self action:@selector(backBtnClick:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn2];
}
#pragma mark-返回view中有几行几列按钮
-(NSMutableArray*)returnBtnsForRowAndCol{
CGFloat allWidth = 0.0;
NSInteger countW=0;
NSMutableArray *indexbtns=[NSMutableArray array];
NSMutableArray *tmpbtns=[NSMutableArray array];
for (int j=0;j<self.btnMsgArrays.count;j++) {
CGFloat width=[self returnBtnWithWithStr:self.btnMsgArrays[j]];
allWidth+=width+KViewMargin;
countW+=1;
if (allWidth>KscreenW-10) {
//判断第一行情况
NSInteger lastNum=[[tmpbtns lastObject]integerValue];
[indexbtns addObject:@(lastNum)];
[tmpbtns removeAllObjects];
allWidth=0.0;
countW=0;
j-=1;
}else{
[tmpbtns addObject:@(countW)];
}
}
if (tmpbtns.count!=0) {
NSInteger lastNum=[[tmpbtns lastObject]integerValue];
[indexbtns addObject:@(lastNum)];
}
return indexbtns;
}
-(CGFloat)returnBtnWithWithStr:(NSString *)str{
//计算字符长度
NSDictionary *minattributesri = @{NSFontAttributeName:[UIFont systemFontOfSize:12]};
CGSize mindetailSizeRi = [str boundingRectWithSize:CGSizeMake(100, MAXFLOAT) options:NSStringDrawingUsesFontLeading attributes:minattributesri context:nil].size;
return mindetailSizeRi.width+12;
}
#pragma mark-按钮点击事件
-(void)btnClick:(UIButton *)btn
{
btn.selected = !btn.isSelected;
if (btn.isSelected) {
btn.layer.borderColor = Color(202, 48, 130).CGColor;
}else
{
btn.layer.borderColor = Color(156, 156, 156).CGColor;
}
}
-(void)showSelectedClick:(UIButton *)btn
{
NSMutableArray *strArray = [[NSMutableArray alloc]init];
for (UIButton *btn in self.allBtnArrays) {
if (btn.isSelected) {
[strArray addObject:btn.currentTitle];
}
}
NSString *str = [strArray componentsJoinedByString:@" & "];
UIFont *font = [UIFont systemFontOfSize:14];
CGFloat strH = [str boundingRectWithSize:CGSizeMake(KscreenW-2*KViewMargin, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:font} context:nil].size.height;
//展示文字
if (!self.showLabel) {
UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(KViewMargin, self.sureButton.bottom+20, KscreenW-2*KViewMargin, strH)];
label.font = font;
label.textColor = [UIColor redColor];
label.numberOfLines = 0;
self.showLabel = label;
[self.view addSubview:label];
}
self.showLabel.text = str;
self.showLabel.height = strH;
}
-(void)backBtnClick:(UIButton *)btn
{
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
