iOS滚动标题栏

.h文件----------------------------------------------------------------------

//

//LYTitleScrollView.h

//LYHandWork

//

//Created by李瑜on 16/9/8.

//Copyright © 2016年李瑜. All rights reserved.

//

#import <UIKIT/UIKIT.h>

/*

*协议

*/

@protocolLYTitleScrollViewDelegate

//处理点击事件的代理方法

- (void)scrollView:(UIScrollView*)scrollView DidSelectedButton:(UIButton*)sender;

@end

@interfaceLYTitleScrollView :UIScrollView

/*

*property

*/

//代理

@property(nonatomic,weak)id buttonEventdelegate;

//该属性决定button的个数以及上面的文字

@property(nonatomic,strong)NSArray * titles;

/*

*Methods

*/

//处理button被选中时的状态

- (void)handleTitleButtonStateWithIndex:(NSInteger)index;

//设置title文字的颜色

- (void)setTitleColor:(UIColor*)color forState:(UIControlState)state;

@end

.m文件--------------------------------------------------------------------------------

//

//LYTitleScrollView.m

//LYHandWork

//

//Created by李瑜on 16/9/8.

//Copyright © 2016年李瑜. All rights reserved.

//

#define SCREEN_W [UIScreen mainScreen].bounds.size.width

#define SCREEN_H [UIScreen mainScreen].bounds.size.height

#import"LYTitleScrollView.h"

@interfaceLYTitleScrollView()

//选中的按钮

@property(nonatomic,strong)UIButton* selectedButton;

//标题滚动条上的所有按钮

@property(nonatomic,strong)NSMutableArray* allButtons;

@end

@implementationLYTitleScrollView

- (NSMutableArray*)allButtons{

if(_allButtons==nil) {

_allButtons= [NSMutableArrayarray];

}

return_allButtons;

}

- (instancetype)initWithFrame:(CGRect)frame{

if(self= [superinitWithFrame:frame]) {

[selfconfigure];

}

returnself;

}

//懒加载，添加按钮到标题滚动条上

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

NSInteger count = titles.count;

CGFloat width =60;

CGFloat height =self.frame.size.height;

for(inti =0; i < count; i++) {

UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];

button.frame = CGRectMake(i * width,0, width, height);

[button setTitle:titles[i] forState:UIControlStateNormal];

[button setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];

[button setTitleColor:[UIColor redColor] forState:UIControlStateSelected];

button.titleLabel.font = [UIFont systemFontOfSize:15];

[selfaddSubview:button];

[button addTarget:selfaction:@selector(titleClick:) forControlEvents:UIControlEventTouchDown];

[self.allButtons addObject:button];

}

[selftitleClick:self.allButtons[0]];

self.contentSize = CGSizeMake(width * count,0);

}

//设置标题文字的颜色

- (void)setTitleColor:(UIColor *)color forState:(UIControlState)state{

for(UIButton * buttoninself.allButtons) {

[button setTitleColor:color forState:state];

}

}

//配置scrollView的属性

- (void)configure{

self.backgroundColor = [[UIColor greenColor] colorWithAlphaComponent:0.5];

self.showsHorizontalScrollIndicator =NO;

self.showsVerticalScrollIndicator =NO;

self.bounces =NO;

self.contentInset = UIEdgeInsetsMake(0,10,0,10);

}

#pragma mark -处理按钮点击事件

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

//处理被点击的button的颜色，形变等状态

[selfhandleTitleButtonStateWithIndex:[self.allButtons indexOfObject:sender]];

//处理点击事件

if([self.buttonEventdelegate respondsToSelector:@selector(scrollView: DidSelectedButton:)]) {

[self.buttonEventdelegate scrollView:selfDidSelectedButton:sender];

}

}

/*

*改变titleButton的状态

*按钮被点击时调用

*/

- (void)handleTitleButtonStateWithIndex:(NSInteger)index{

if(index >self.allButtons.count -1|| index <0) {

return;

}

UIButton * sender =self.allButtons[index];

if(sender ==self.selectedButton) {

NSLog(@"重复点击");

}

//取消上一个按钮的选中状态

[self.selectedButton setSelected:NO];

//使当前按钮进入选中状态

[sender setSelected:YES];

//点击后放大

[UIView animateWithDuration:0.3animations:^{

self.selectedButton.transform = CGAffineTransformIdentity;

sender.transform = CGAffineTransformMakeScale(1.2,1.2);

}];

/*

*如果按钮部分在屏幕之外，点击按钮滚动标题条使选中的按钮完全显示

*/

CGFloat offset =self.contentOffset.x;

//超出屏幕左边之外

if(sender.frame.origin.x - offset <0) {

[UIView animateWithDuration:0.3animations:^{

self.contentOffset = CGPointMake(sender.frame.origin.x,0);

}];

}

//超出屏幕右边之外

if(CGRectGetMaxX(sender.frame) - offset > SCREEN_W) {

[UIView animateWithDuration:0.3animations:^{

self.contentOffset = CGPointMake(CGRectGetMaxX(sender.frame) - SCREEN_W,0);

}];

}

//记录已经被选中的按钮

self.selectedButton = sender;

}

@end

注意：控制器使用此类时，一定要加上代码（如果有导航控制器的情况下）self.navigationController.navigationBar.translucent=NO;否则button将无法显示