*:first-child {
margin-top: 0 !important; }
body > *:last-child {
margin-bottom: 0 !important; }
a {
color: #4183C4; }
a.absent {
color: #cc0000; }
a.anchor {
display: block;
padding-left: 30px;
margin-left: -30px;
cursor: pointer;
position: absolute;
top: 0;
left: 0;
bottom: 0; }
h1, h2, h3, h4, h5, h6 {
margin: 20px 0 10px;
padding: 0;
font-weight: bold;
-webkit-font-smoothing: antialiased;
cursor: text;
position: relative; }
h1:hover a.anchor, h2:hover a.anchor, h3:hover a.anchor, h4:hover a.anchor, h5:hover a.anchor, h6:hover a.anchor {
background: url(data:image/png;base64,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) no-repeat 10px center;
text-decoration: none; }
h1 tt, h1 code {
font-size: inherit; }
h2 tt, h2 code {
font-size: inherit; }
h3 tt, h3 code {
font-size: inherit; }
h4 tt, h4 code {
font-size: inherit; }
h5 tt, h5 code {
font-size: inherit; }
h6 tt, h6 code {
font-size: inherit; }
h1 {
font-size: 28px;
color: black; }
h2 {
font-size: 24px;
border-bottom: 1px solid #cccccc;
color: black; }
h3 {
font-size: 18px; }
h4 {
font-size: 16px; }
h5 {
font-size: 14px; }
h6 {
color: #777777;
font-size: 14px; }
p, blockquote, ul, ol, dl, li, table, pre {
margin: 15px 0; }
hr {
background: transparent url(data:image/png;base64,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) repeat-x 0 0;
border: 0 none;
color: #cccccc;
height: 4px;
padding: 0;
}
body > h2:first-child {
margin-top: 0;
padding-top: 0; }
body > h1:first-child {
margin-top: 0;
padding-top: 0; }
body > h1:first-child + h2 {
margin-top: 0;
padding-top: 0; }
body > h3:first-child, body > h4:first-child, body > h5:first-child, body > h6:first-child {
margin-top: 0;
padding-top: 0; }
a:first-child h1, a:first-child h2, a:first-child h3, a:first-child h4, a:first-child h5, a:first-child h6 {
margin-top: 0;
padding-top: 0; }
h1 p, h2 p, h3 p, h4 p, h5 p, h6 p {
margin-top: 0; }
li p.first {
display: inline-block; }
li {
margin: 0; }
ul, ol {
padding-left: 30px; }
ul :first-child, ol :first-child {
margin-top: 0; }
dl {
padding: 0; }
dl dt {
font-size: 14px;
font-weight: bold;
font-style: italic;
padding: 0;
margin: 15px 0 5px; }
dl dt:first-child {
padding: 0; }
dl dt > :first-child {
margin-top: 0; }
dl dt > :last-child {
margin-bottom: 0; }
dl dd {
margin: 0 0 15px;
padding: 0 15px; }
dl dd > :first-child {
margin-top: 0; }
dl dd > :last-child {
margin-bottom: 0; }
blockquote {
border-left: 4px solid #dddddd;
padding: 0 15px;
color: #777777; }
blockquote > :first-child {
margin-top: 0; }
blockquote > :last-child {
margin-bottom: 0; }
table {
padding: 0;border-collapse: collapse; }
table tr {
border-top: 1px solid #cccccc;
background-color: white;
margin: 0;
padding: 0; }
table tr:nth-child(2n) {
background-color: #f8f8f8; }
table tr th {
font-weight: bold;
border: 1px solid #cccccc;
margin: 0;
padding: 6px 13px; }
table tr td {
border: 1px solid #cccccc;
margin: 0;
padding: 6px 13px; }
table tr th :first-child, table tr td :first-child {
margin-top: 0; }
table tr th :last-child, table tr td :last-child {
margin-bottom: 0; }
img {
max-width: 100%; }
span.frame {
display: block;
overflow: hidden; }
span.frame > span {
border: 1px solid #dddddd;
display: block;
float: left;
overflow: hidden;
margin: 13px 0 0;
padding: 7px;
width: auto; }
span.frame span img {
display: block;
float: left; }
span.frame span span {
clear: both;
color: #333333;
display: block;
padding: 5px 0 0; }
span.align-center {
display: block;
overflow: hidden;
clear: both; }
span.align-center > span {
display: block;
overflow: hidden;
margin: 13px auto 0;
text-align: center; }
span.align-center span img {
margin: 0 auto;
text-align: center; }
span.align-right {
display: block;
overflow: hidden;
clear: both; }
span.align-right > span {
display: block;
overflow: hidden;
margin: 13px 0 0;
text-align: right; }
span.align-right span img {
margin: 0;
text-align: right; }
span.float-left {
display: block;
margin-right: 13px;
overflow: hidden;
float: left; }
span.float-left span {
margin: 13px 0 0; }
span.float-right {
display: block;
margin-left: 13px;
overflow: hidden;
float: right; }
span.float-right > span {
display: block;
overflow: hidden;
margin: 13px auto 0;
text-align: right; }
code, tt {
margin: 0 2px;
padding: 0 5px;
white-space: nowrap;
border: 1px solid #eaeaea;
background-color: #f8f8f8;
border-radius: 3px; }
pre code {
margin: 0;
padding: 0;
white-space: pre;
border: none;
background: transparent; }
.highlight pre {
background-color: #f8f8f8;
border: 1px solid #cccccc;
font-size: 13px;
line-height: 19px;
overflow: auto;
padding: 6px 10px;
border-radius: 3px; }
pre {
background-color: #f8f8f8;
border: 1px solid #cccccc;
font-size: 13px;
line-height: 19px;
overflow: auto;
padding: 6px 10px;
border-radius: 3px; }
pre code, pre tt {
background-color: transparent;
border: none; }
sup {
font-size: 0.83em;
vertical-align: super;
line-height: 0;
}
* {
-webkit-print-color-adjust: exact;
}
@media screen and (min-width: 914px) {
body {
width: 854px;
margin:0 auto;
}
}
@media print {
table, pre {
page-break-inside: avoid;
}
pre {
word-wrap: break-word;
}
}
-->
10-抽屉效果
第一步:搭建界面
- (void)viewDidLoad {
[super viewDidLoad];
//搭建界面
[self setUpView];
}
- (void)setUpView{
//添加左边的View
UIView *leftV = [[UIView alloc] initWithFrame:self.view.bounds];
//左边蓝
leftV.backgroundColor = [UIColor blueColor];
[self.view addSubview:leftV];
//添加右边的View
UIView *rightV = [[UIView alloc] initWithFrame:self.view.bounds];
//右边绿
rightV.backgroundColor = [UIColor greenColor];
self.rightV = rightV;
[self.view addSubview:rightV];
//添加中间的View(中间一个最后添加,显示到最外面.)
UIView *mainV = [[UIView alloc] initWithFrame:self.view.bounds];
//中间红
mainV.backgroundColor = [UIColor redColor];
self.mainV = mainV;
[self.view addSubview:mainV];
}
第二步.添加手势.能够让中间的红色View左右移动,要在控制器View加载完成时就要添加View
- (void)viewDidLoad {
[super viewDidLoad];
//搭建界面
[self setUpView];
//拖动手势
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
//添加手势
[self.mainV addGestureRecognizer:pan];
}
实现手势方法:
当手指拖动时调用.
-(void)pan:(UIPanGestureRecognizer *)pan{
//获取手指在屏幕上的偏移量
CGPoint transP = [pan translationInView:self.mainV];
//注意:在这里为什么不用Transform,是因为我们移动时,要改变的尺寸大小. 用Transform只能改变它的位置.
self.mainV.transform = CGAffineTransformTranslate(self.mainV.transform, transP.x, 0);
//计算mainV的Frame
//单独抽出一个方法来计算mainV的frame.因为要计算它的Y值和高度.代码会很多.所以单独抽出一个方法
self.mainV.frame = [self frameWithOffsetX:transP.x];
//每次移动时判断当前MainV的x值是大于0还是小于0.如果是大于0,就显示左边,小于0,显示右边
if (self.mainV.frame.origin.x > 0) {
self.rightV.hidden = YES;
}else if(self.mainV.frame.origin.x < 0){
self.rightV.hidden = NO;
}
//注意要做复位
[pan setTranslation:CGPointZero inView:self.mainV];
}
//最大Y值为100
#define maxY 100
//根据偏移量计算mainV的frame.
- (CGRect)frameWithOffsetX:(CGFloat)offsetX{
//取出最原始的Frame
CGRect frame = self.mainV.frame;
frame.origin.x += offsetX;
//获取屏幕的宽度
(计算Y值如下图:找最大值.当Main.x拖动最大的时候,Main.y值也最大.main.x 最大为屏幕的宽度)
设定一个最大Y值MaxY为100,正好.当max.x为屏幕的宽度时,最大Y等于100,所以Y值等于main.y = main.x * maxY / ScreenW;
100 = 375 * 100 / 375;)
有可能frame.origin.x有可能是小于0,小于0的话, 得出的Y值就会小于0,小于0就会出现, 红色的View向上 .
//对结果取绝对值.
frame.origin.y= fabs(frame.origin.x*maxY/screenW);
计算frame的高度 (当前Main的高度等于屏幕的高度减去两倍的Y值.)
frame.size.height = screenH - 2 * frame.origin.y;
//返回计算好的frame.
return frame;
}
第三步:当手指松开时做到自动定位.
MainV定位到右侧的X值
#define targetR 275
MainV定位到右侧的X值
#define targetL -275
//当手指拖动时调用.
-(void)pan:(UIPanGestureRecognizer *)pan{
//获取手指在屏幕上的偏移量
CGPoint transP = [pan translationInView:self.mainV];
//在这为什么不使用Transform,是因为我们移动时,要改变的尺寸大小. Transform只能改变它的位置.
self.mainV.transform = CGAffineTransformTranslate(self.mainV.transform, transP.x, 0);
//计算mainV的Frame
//单独抽出一个方法来计算mainV的frame.因为要计算它的Y值和高度.代码会很多.所以单独抽出一个方法
self.mainV.frame = [self frameWithOffsetX:transP.x];
//每次移动时判断当前MainV的x值是大于0还是小于0.如果是大于0 ,就显在左边,小于0 显示右边
if (self.mainV.frame.origin.x > 0) {
self.rightV.hidden = YES;
}else if(self.mainV.frame.origin.x < 0){
self.rightV.hidden = NO;
}
//判断手指的状态
if(pan.state == UIGestureRecognizerStateEnded){
//当手指松开时进入执行
记录最终判断结果后.定位的值.
CGFloat target = 0;
当手指松开,要判断MainV的x值是否大于屏幕的一半.如果大于屏幕一半时,自动定位到右边 那个位置.
if (self.mainV.frame.origin.x > screenW * 0.5) {
target = targetR;
}else if(CGRectGetMaxX(self.mainV.frame) < screenW * 0.5){
//当手指松开,要判断MainV的最大的X值是否小于屏幕的一半.如果小于屏幕的一半时, 动定位到左边的位置.
target = targetL;
}
//最终定位的x值 - 当前的main.x的值. 求出偏移量.使其定位
CGFloat offsetX = target - self.mainV.frame.origin.x;
//根据偏移量设置mainV的frame值
CGRect frame = [self frameWithOffsetX:offsetX];
[UIView animateWithDuration:0.25 animations:^{
//伴随动画设置frame
self.mainV.frame = frame; }];
}
//注意要做复位
[pan setTranslation:CGPointZero inView:self.mainV];
}