#import?

@interface?WPageTitleView :?UIView

@property?(nonatomic,assign)?NSInteger?selectedIndex;

//添加參數(shù)數(shù)組

@property?(nonatomic,strong)?NSArray?*titles;

@property?(nonatomic,copy)?void?(^buttonSelected)(NSInteger?index);

@end

#import?"WPageTitleView.h"

@interface?WPageTitleView?()

@property?(nonatomic,strong)?UIView?*sliderView;

@property?(nonatomic,weak)?UIButton?*selectedButton;

@end

@implementation?WPageTitleView

- (void)titleButtonClicked:(UIButton?*)button {

?_selectedIndex?= button.tag;

?if?(self.selectedButton) {

?self.selectedButton.selected?=YES;

? ? }

button.selected=?NO;

?self.selectedButton= button;

?if?(self.buttonSelected) {

?self.buttonSelected(button.tag);

? ? }

?NSString* title? ? ? ? ? ? ? =?self.titles[button.tag];

?CGFloat?sliderWidth? ? ? ? ? = button.titleLabel.font.pointSize?* title.length;

? ? [self.sliderViewmas_remakeConstraints:^(MASConstraintMaker?*make) {

make.width.mas_equalTo(sliderWidth);

make.height.mas_equalTo(2);

make.centerX.equalTo(button);

make.bottom.equalTo(self).offset(-2);

? ? }];

? ? [UIView?animateWithDuration:0.25animations:^{

? ? ? ? [selflayoutIfNeeded];

? ? }];

}

- (void)setSelectedIndex:(NSInteger)selectedIndex {

?_selectedIndex?= selectedIndex;

?UIButton* button =?self.subviews[selectedIndex];

? ? [selftitleButtonClicked:button];

}

- (void)setTitles:(NSArray?*)titles {

? ? [self.subviewsmakeObjectsPerformSelector:@selector(removeFromSuperview)];

?_titles?= titles;

?CGFloat?width ? ? ? ? = [UIScreenmainScreen].bounds.size.width?/ titles.count;

?for?(?int?i ? ? ? ? ? =0; i

?UIButton* titleButton = [selftitleButton:titles[i]];

titleButton.tag?= i;

[self?addSubview:titleButton];

[titleButton?mas_makeConstraints:^(MASConstraintMaker?*make) {

make.top.bottom.equalTo(self);

make.left.equalTo(self).offset(width * i);

make.width.mas_equalTo(width);

? ? ? ? }];

?if?(i !=?0) {

titleButton.selected=?YES;

}?else?{

?self.selectedButton?= titleButton;

? ? ? ? }

? ? }

?UIButton?*button? ? ? =?self.subviews[0];

?NSString?*title ? ? ? = titles[0];

?CGFloat?sliderWidth ? = button.titleLabel.font.pointSize?* title.length;

? ? [selfaddSubview:self.sliderView];

? ? [self.sliderViewmas_makeConstraints:^(MASConstraintMaker?*make) {

make.width.mas_equalTo(sliderWidth);

make.height.mas_equalTo(4);

make.centerX.equalTo(button);

make.bottom.equalTo(self).offset(-3);

? ? }];

? ? [selflayoutIfNeeded];

}

- (UIButton?*)titleButton:(NSString?*)title {

?UIButton* titleButton ? ? ? = [[UIButtonalloc]?init];

[titleButton?addTarget:selfaction:@selector(titleButtonClicked:)forControlEvents:UIControlEventTouchUpInside];

? ? titleButton.titleLabel.font?= [UIFontsystemFontOfSize:15];

[titleButton?setTitleColor:[UIColorredColor]?forState:UIControlStateNormal];

[titleButton?setTitleColor:[UIColorgrayColor]?forState:UIControlStateSelected];

[titleButton?setTitle:titleforState:UIControlStateNormal];

?return?titleButton;

}

- (void)drawRect:(CGRect)rect {

? ? [selfmakelineStartPoint:self.sliderView.bottomandEndPoint:self.sliderView.bottom];

? ? [selfmakelineStartPoint:self.selectedButton.topandEndPoint:self.selectedButton.top];

}

- (void)makelineStartPoint:(CGFloat)statPoint andEndPoint:(CGFloat)endPoint {

?CGContextRef?context =UIGraphicsGetCurrentContext();

?CGContextSetLineCap(context,kCGLineCapRound);

?CGContextSetLineWidth(context,0.5);?//線寬

?CGContextSetAllowsAntialiasing(context,true);

?CGContextSetStrokeColorWithColor(context, [UIColorgrayColor].CGColor);

?CGContextBeginPath(context);

?CGContextMoveToPoint(context,?0, statPoint);?//起點(diǎn)坐標(biāo)

?CGContextAddLineToPoint(context,self.frame.size.width, endPoint); ?//終點(diǎn)坐標(biāo)

?CGContextStrokePath(context);

}

- (UIView?*)sliderView {

?if?(!_sliderView) {

?UIView* sliderView? ? ? ? ? ? = [[UIViewalloc]?init];

? ? ? ? sliderView.backgroundColor? ? = [UIColorredColor];

sliderView.layer.cornerRadius?=2;

sliderView.clipsToBounds=?YES;

?_sliderView?= sliderView;

? ? }

?return_sliderView;

}

@end

調(diào)用

WPageTitleView?*titleView = [[WPageTitleViewalloc]?init];

[headerView?addSubview:titleView];

?self.titleView?= titleView;

titleView.backgroundColor= [UIColorwhiteColor];

[titleView?mas_makeConstraints:^(MASConstraintMaker?*make) {

make.left.right.mas_equalTo(headerView);

make.bottom.equalTo(headerView.mas_bottom);

? ? ? ? make.height.mas_equalTo(NNTitleHeight);

? ? }];

? ? [self.scrollViewmas_makeConstraints:^(MASConstraintMaker?*make) {

? ? ? ? make.left.right.bottom.equalTo(self.view);

make.top.mas_equalTo(headerView.top);

? ? }];

?__weak?typeof(self) weakSelf =self;

titleView.titles?=?@[@"動(dòng)態(tài)",?@"文章",@"更多"];

titleView.selectedIndex=?0;

titleView.buttonSelected?= ^(NSInteger?index){

[weakSelf.scrollView?setContentOffset:CGPointMake(NNScreenWidth?* index,0)animated:YES];

? ? };