顶部滚动菜单栏
封装了2个类 github地址:https://github.com/PengHongMiao/-demo.git
//
// PHTopTitleView.h
// 顶部滚动菜单
//
// Created by 123 on 16/9/10.
// Copyright © 2016年 彭洪. All rights reserved.
//
#import <UIKit/UIKit.h>
@class PHTopTitleView;
@protocol PHTopTitleViewDelegate <NSObject>
- (void)topTitleView:(PHTopTitleView *)topTitleView didSelectTitleAtIndex:(NSInteger)index;
@end
@interface PHTopTitleView : UIScrollView
/** 禁止标题数组 */
@property (nonatomic,strong) NSArray *staticTitleArr;
/** 滚动标题数组 */
@property (nonatomic,strong) NSArray *scrollTitleArr;
/** 存入所有Label */
@property (nonatomic,strong) NSMutableArray *allTitleLabel;
@property (nonatomic,weak) id<PHTopTitleViewDelegate>delegate;
/** 类方法 */
+ (instancetype)topTitleViewWithFrame:(CGRect)frame;
#pragma mark 给外界ScrollView提供的方法以及自身方法实现
/** 禁止标题选中颜色改变以及指示器位置变化 */
- (void)staticTitleLabelSelected:(UILabel *)label;
/** 滚动标题选中颜色以及指示器位置变化 */
- (void)scrollTitleLabelSelected:(UILabel *)label;
/** 滚动标题选中居中 */
- (void)scrollTitleLabelSelectedCenter:(UILabel *)centerLabel;
#pragma mark 给外界ScrollView提供的方法
/** 滚动ScrollView 让文字呈现渐变效果 */
- (void)scrollTitleLabelSelectedChangeTextColorFadeScrollView:(UIScrollView *)scrollView;
@end
//
// PHTopTitleView.m
// 顶部滚动菜单
//
// Created by 123 on 16/9/10.
// Copyright © 2016年 彭洪. All rights reserved.
//
#import "PHTopTitleView.h"
#import "UIView+PHExtension.h"
#define labelFontOfSize [UIFont systemFontOfSize:17]
#define SCREEN_Width [UIScreen mainScreen].bounds.size.width
#define selectedTitleIndicatorViewColor [UIColor redColor]
@interface PHTopTitleView ()
/** 静止标题 */
@property (nonatomic,strong) UILabel *staticTitleLabel;
/** 滚动标题 */
@property (nonatomic,strong) UILabel *scrollTitleLabel;
/** 选中标题时Label */
@property (nonatomic,strong) UILabel *selectedTitleLabel;
/** 指示器 */
@property (nonatomic,strong) UIView *indicatorView;
@end
@implementation PHTopTitleView
/** label之间的间距 */
static CGFloat const labelMargin = 15;
/** 指示器的高度 */
static CGFloat const indicatorHeight = 3;
- (NSMutableArray *)allTitleLabel {
if (_allTitleLabel == nil) {
_allTitleLabel = [[NSMutableArray alloc] init];
}
return _allTitleLabel;
}
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
self.backgroundColor = [UIColor colorWithWhite:1.0 alpha:0.9];
self.showsHorizontalScrollIndicator = NO;
self.bounces = NO;//弹性设置
}
return self;
}
+ (instancetype)topTitleViewWithFrame:(CGRect)frame {
return [[self alloc] initWithFrame:frame];
}
/**
* 计算文字尺寸
*
* @param text 需要计算尺寸的文字
* @param font 文字的字体大小
* @param maxSize 文字的最大尺寸
*
* @return label的大小
*/
- (CGSize)sizeWithText:(NSString *)text font:(UIFont *)font maxSize:(CGSize)maxSize {
NSDictionary *attributes = @{NSFontAttributeName:font};
return [text boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil].size;
}
#pragma mark 重写禁止标题数组的setter方法
- (void)setStaticTitleArr:(NSArray *)staticTitleArr {
_staticTitleArr = staticTitleArr;
//计算ScrollView的宽度
CGFloat scrollViewWidth = self.frame.size.width;
CGFloat labelX = 0;
CGFloat labelY = 0;
CGFloat labelW = scrollViewWidth / self.staticTitleArr.count;
CGFloat labelH = self.frame.size.height - indicatorHeight;
for (NSInteger j=0; j<self.staticTitleArr.count; j++) {
//创建静止标题时label
self.staticTitleLabel = [[UILabel alloc] init];
_staticTitleLabel.userInteractionEnabled = YES;
_staticTitleLabel.text = self.staticTitleArr[j];
_staticTitleLabel.textAlignment = NSTextAlignmentCenter;
_staticTitleLabel.tag = j;
//设置高亮文字颜色
_staticTitleLabel.highlightedTextColor = selectedTitleIndicatorViewColor;
//计算staticTitleLabel的x值
labelX = j*labelW;
_staticTitleLabel.frame = CGRectMake(labelX, labelY, labelW, labelH);
//添加到titlesLabels数组
[self.allTitleLabel addObject:_staticTitleLabel];
//添加点按手势
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(staticTitleClick:)];
[_staticTitleLabel addGestureRecognizer:tap];
//默认选中0个label
if (j == 0) {
[self staticTitleClick:tap];
}
[self addSubview:_staticTitleLabel];
}
//取出第一个子空间
UILabel *firstLabel = self.subviews.firstObject;
//添加指示器
self.indicatorView = [[UIView alloc] init];
_indicatorView.backgroundColor = selectedTitleIndicatorViewColor;
_indicatorView.PH_height = indicatorHeight;
_indicatorView.PH_y = self.frame.size.height - indicatorHeight;
[self addSubview:_indicatorView];
//指示器默认在第一个选中位置
CGSize labelSize = [self sizeWithText:firstLabel.text font:labelFontOfSize maxSize:CGSizeMake(MAXFLOAT, labelH)];
_indicatorView.PH_width = labelSize.width;
_indicatorView.PH_centerX = firstLabel.PH_centerX;
}
/** scrollTitleClick的点击事件 */
- (void)scrollTitleClick:(UITapGestureRecognizer *)tap {
//0.获取选中的label
UILabel *selLabel = (UILabel *)tap.view;
//1.标题颜色变成红色 设置高亮状态下的颜色 以及指示器的位置
[self scrollTitleLabelSelected:selLabel];
//让选中的标题居中
[self scrollTitleLabelSelectedCenter:selLabel];
//代理方法实现
NSInteger index = selLabel.tag;
if ([self.delegate respondsToSelector:@selector(topTitleView:didSelectTitleAtIndex:)]) {
[self.delegate topTitleView:self didSelectTitleAtIndex:index];
}
}
/** 滚动标题选中颜色改变以及指示器位置变化 */
- (void)scrollTitleLabelSelected:(UILabel *)label {
//取消高亮
_selectedTitleLabel.highlighted = NO;
//颜色回复
_selectedTitleLabel.textColor = [UIColor blackColor];
//高亮
label.highlighted = YES;
_selectedTitleLabel = label;
//改变指示器位置
[UIView animateWithDuration:0.20 animations:^{
self.indicatorView.PH_width = label.PH_width - 2*labelMargin;
self.indicatorView.PH_centerX = label.PH_centerX;
}];
}
/** 滚动标题选中居中 */
- (void)scrollTitleLabelSelectedCenter:(UILabel *)centerLabel {
//计算偏移量
CGFloat offsetX = centerLabel.center.x - SCREEN_Width * 0.5;
if (offsetX < 0) {
offsetX = 0;
}
//获取最大滚动范围
CGFloat maxOffsetX = self.contentSize.width - SCREEN_Width;
if (offsetX>maxOffsetX) {
offsetX = maxOffsetX;
}
//滚动标题滚动条
[self setContentOffset:CGPointMake(offsetX, 0) animated:YES];
}
#pragma mark 给外界ScrollView提供的方法
- (void)scrollTitleLabelSelectedChangeTextColorFadeScrollView:(UIScrollView *)scrollView {
//当前label的位置
CGFloat currentPage = scrollView.contentOffset.x / scrollView.bounds.size.width;
NSInteger leftIndex = currentPage;
NSInteger rightIndex = leftIndex + 1;
//获取左边label
UILabel *leftLabel = self.allTitleLabel[leftIndex];
//获取右边label
UILabel *rightLabel;
if (rightIndex < self.allTitleLabel.count - 1) {
rightLabel = self.allTitleLabel[rightIndex];
}
//计算下右边缩放比例
CGFloat rightScale = currentPage - leftIndex;
//计算下左边缩放比例
CGFloat leftScale = 1 - rightScale;
//设置文字颜色渐变
leftLabel.textColor = [UIColor colorWithRed:leftScale green:0 blue:0 alpha:1];
rightLabel.textColor = [UIColor colorWithRed:rightScale green:0 blue:0 alpha:1];
}
- (void)staticTitleClick:(UITapGestureRecognizer *)tap {
}
@end
//
// UIView+PHExtension.h
// 顶部滚动菜单
//
// Created by 123 on 16/9/10.
// Copyright © 2016年 彭洪. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface UIView (PHExtension)
@property (nonatomic,assign) CGFloat PH_x;
@property (nonatomic,assign) CGFloat PH_y;
@property (nonatomic,assign) CGFloat PH_width;
@property (nonatomic,assign) CGFloat PH_height;
@property (nonatomic,assign) CGFloat PH_centerX;
@property (nonatomic,assign) CGFloat PH_centerY;
@property (nonatomic,assign) CGSize PH_size;
@end
//
// UIView+PHExtension.m
// 顶部滚动菜单
//
// Created by 123 on 16/9/10.
// Copyright © 2016年 彭洪. All rights reserved.
//
#import "UIView+PHExtension.h"
@implementation UIView (PHExtension)
#pragma mark 设置器方法
- (void)setPH_x:(CGFloat)PH_x {
CGRect frame = self.frame;
frame.origin.x +=PH_x;
self.frame = frame;
}
- (void)setPH_y:(CGFloat)PH_y {
CGRect frame = self.frame;
frame.origin.y += PH_y;
self.frame = frame;
}
- (void)setPH_width:(CGFloat)PH_width {
CGRect frame = self.frame;
frame.size.width += PH_width;
self.frame = frame;
}
- (void)setPH_height:(CGFloat)PH_height {
CGRect frame = self.frame;
frame.size.height += PH_height;
self.frame = frame;
}
- (void)setPH_centerX:(CGFloat)PH_centerX {
CGPoint center = self.center;
center.x += PH_centerX;
self.center = center;
}
- (void)setPH_centerY:(CGFloat)PH_centerY {
CGPoint center = self.center;
center.y += PH_centerY;
self.center = center;
}
- (void)setPH_size:(CGSize)PH_size {
CGRect frame = self.frame;
frame.size = PH_size;
self.frame = frame;
}
#pragma mark 获取器方法
- (CGFloat)PH_x {
return self.frame.origin.x;
}
- (CGFloat)PH_y {
return self.frame.origin.y;
}
- (CGFloat)PH_width {
return self.frame.size.width;
}
- (CGFloat)PH_height {
return self.frame.size.height;
}
- (CGFloat)PH_centerX {
return self.center.x;
}
- (CGFloat)PH_centerY {
return self.center.y;
}
- (CGSize)PH_size {
return self.frame.size;
}
+ (instancetype)PH_ViewFromXib {
return [[NSBundle mainBundle] loadNibNamed:NSStringFromClass(self) owner:nil options:nil].lastObject;
}
@end
