iOS 自定义滑动切换TabBar

貌似经常会用到，自己整理收藏起来，方便日后查找备用。

效果如图：

由于制作gif，调整了属性，所以看起来的效果不好。如果用默认配置，生成的gif会很大。

制作gif:

1.使用QuickTimePlayer ，mac上插上iPhone, 然后进行屏幕录制，但是要选择插上的iPhone,然后会自动在Mac弹出同步的iPhone屏幕，点击录制。

2.使用GIFBrewery，选中录制文件*.mov, 进行生成gif。

代码如下：

#import "XPBaseView.h"

@protocol XPDetailTabBarViewDelegate;

@interface XPDetailTabBarView : XPBaseView

@property (nonatomic,weak) id<XPDetailTabBarViewDelegate> delegate;
/**
 *  是否是双语
 */
@property (nonatomic,assign) BOOL isBilingual;
/**
 *  是否点赞
 */
@property (nonatomic,assign) BOOL isLike;

@end

@protocol XPDetailTabBarViewDelegate <NSObject>

@optional
- (void)XPDetailTabBarView:(XPDetailTabBarView*)view clickIndex:(NSInteger)index;

@end

#import "XPDetailTabBarView.h"

@interface XPDetailTabBarView ()

@property (nonatomic,strong) NSArray *dataImages;
@property (nonatomic,strong) UIView *moveView;
@property (nonatomic,assign) NSInteger moveIndex;

@end

@implementation XPDetailTabBarView

-(void)initData{

}

-(void)initSubViews{
    self.dataImages = @[@"detail_tab_english",@"icon_like",@"detail_tab_recording",@"detail_tab_quiz",@"detail_tab_myrecord"];

    CGFloat itemWidth = SCREEN_WIDTH / self.dataImages.count;
    CGFloat itemHeight = 44;

    self.moveView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, itemWidth, itemWidth)];
    self.moveView.backgroundColor = AppStyleThemeOrangeColor;
    [self addSubview:self.moveView];

    for (int i = 0; i<self.dataImages.count; i++)
    {
        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.tag = 20000+i;
        button.frame = CGRectMake(i*itemWidth, 0, itemWidth, itemHeight);
        button.backgroundColor = [UIColor clearColor];
        [button setImage:[UIImage imageNamed:[self.dataImages objectAtIndex:i]] forState:UIControlStateNormal];
        [button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button];
    }
}

-(void)setMoveIndex:(NSInteger)moveIndex{

    NSInteger animationType = 1;//1左，2右
    if(moveIndex > _moveIndex){
        animationType = 2;
    }

    _moveIndex = moveIndex;

    CGFloat itemWidth = SCREEN_WIDTH / self.dataImages.count;
    CGFloat itemHeight = 44;

    CGRect rect = CGRectMake(moveIndex*itemWidth, 0, itemWidth, itemHeight);

    WS(weakSelf)
    [UIView animateWithDuration:0.2 animations:^{
        if (animationType == 2){//右
            weakSelf.moveView.frame = CGRectMake(rect.origin.x+2, rect.origin.y, rect.size.width, rect.size.height);
        } else if (animationType == 1){//左
            weakSelf.moveView.frame = CGRectMake(rect.origin.x-2, rect.origin.y, rect.size.width, rect.size.height);
        }
    } completion:^(BOOL finished) {
        [UIView animateWithDuration:0.3 animations:^{
            if (animationType == 2){//右
                weakSelf.moveView.frame = CGRectMake(rect.origin.x-5, rect.origin.y, rect.size.width, rect.size.height);
            } else if (animationType == 1){//左
                weakSelf.moveView.frame = CGRectMake(rect.origin.x+5, rect.origin.y, rect.size.width, rect.size.height);
            }
        } completion:^(BOOL finished) {
            [UIView animateWithDuration:0.4 animations:^{
                weakSelf.moveView.frame = rect;
            } completion:^(BOOL finished) {

            }];
        }];
    }];
}

- (void)setIsBilingual:(BOOL)isBilingual{
    _isBilingual = isBilingual;

    UIButton *button = [self viewWithTag:20000];
    if(isBilingual){
        [button setImage:[UIImage imageNamed:@"detail_tab_english"] forState:UIControlStateNormal];
    }else{
        [button setImage:[UIImage imageNamed:@"detail_tab_bilingual"] forState:UIControlStateNormal];
    }
}

- (void)setIsLike:(BOOL)isLike{
    _isLike = isLike;

    UIButton *button = [self viewWithTag:20001];
    if(isLike){
        [button setImage:[UIImage imageNamed:@"icon_like_selected"] forState:UIControlStateNormal];
    }else{
        [button setImage:[UIImage imageNamed:@"icon_like"] forState:UIControlStateNormal];
    }
}

- (void)buttonClicked:(UIButton*)button{
    NSInteger index = button.tag - 20000;

    self.moveIndex = index;

    if(self.delegate && [self.delegate respondsToSelector:@selector(XPDetailTabBarView:clickIndex:)]){
        [self.delegate XPDetailTabBarView:self clickIndex:index];
    }
}
@end