UIActionSheet完美解决方案

　　最近程序中用到了，底部弹出框，看了下，前辈写得代码，搜索了下网路，发现其实都没有很好的解决问题，所以研究了下，将代码分享出来，跟大家分享一下，有问题的话，欢迎各位大牛批评指正。

最古老的方法一：

-(void)CreateActionSheet{

    self.actionSheet = [[UIActionSheetalloc] initWithTitle:@"选择"delegate:selfcancelButtonTitle:@"cancel"destructiveButtonTitle:nilotherButtonTitles:@"a",@"a",@"a", nil];

    [self.actionSheetaddSubview:self.baseView];

}

上面的方法，是在系统的ActionSheet图层上覆盖图层，已达到底部弹出的效果。

优点：使用简单方便

缺点： 这个方法无法很好的解决ActionSheet高度问题，没有办法自定

改进方法二：

继承UIActionSheet 重写 -(void)layoutSubviews方法。网上有很多这种代码，大家可以去看下。

优点：实现了ActionSheet的高度自定问题

缺点：失去了原有ActionSheet中得动画效果，和阴影点击效果

完美解决三：

方案一： 在方法二中，补全确实的动画效果和阴影点击效果。问题可以很好的解决，单需要对IOS6和IOS7做不同的处理，因为IOS7时，ActonSheet的父视图有所改变，有兴趣的童鞋可以看看。

　　　　 想要代码的可以给我留言。

方案二：按照IOS7中ActionSheet的原理重新定制。话不多说直接上代码

#import <UIKit/UIKit.h>



@interface RecreateActionSheet : UIView

@property (nonatomic,retain) UIButton * baseView;

@property (nonatomic,retain) UIView * baseActionSheet;

@property (nonatomic,retain) UIView * contentView;

@property (nonatomic,retain) UINavigationBar * navBar;

@property (nonatomic,retain) UINavigationItem * navItem;



-(id)initWithHeight:(CGFloat)_height WithTitle:(NSString *)_title;

-(void)show;

-(void)dismiss;

@end

#import "RecreateActionSheet.h"



@interface RecreateActionSheet (){



    CGRect mainBounds; //主屏幕大小

//    UIWindow * mainWindow; //主屏幕

    CGRect actionRect1; //初始位置

    CGRect actionRect2; //结束位置

}

@end



@implementation RecreateActionSheet





-(id)initWithFrame:(CGRect)frame

{

    self = [super initWithFrame:frame];

    if (self) {

        // Initialization code

    }

    return self;

}



-(id)initWithHeight:(CGFloat)_height WithTitle:(NSString *)_title{

    mainBounds = [UIScreen mainScreen].bounds;

//    mainWindow = [[UIApplication sharedApplication].windows objectAtIndex:0];

    actionRect1 = CGRectMake(0, mainBounds.size.height, mainBounds.size.width, 0);

    actionRect2 = CGRectMake(0, mainBounds.size.height - _height - 44, mainBounds.size.width, _height + 44);

    self = [super initWithFrame:mainBounds];

    if (self) {

        // Initialization code

        [self createUiWithHeight:_height];

        [self createNavItemWithTitle:_title];

    }

    return self;

}



-(void)dealloc{

    [self.baseActionSheet release];

    [self.contentView release];

    [self.navBar release];

    [self.navItem release];

    [super dealloc];

}



-(void)createUiWithHeight:(CGFloat)_height{

    

    _baseView = [UIButton buttonWithType:UIButtonTypeCustom];

    _baseView.frame = mainBounds;

    _baseView.backgroundColor = [UIColor blackColor];

    _baseView.alpha = 0;

    [_baseView addTarget:self action:@selector(dismiss) forControlEvents:UIControlEventTouchUpInside];

    [self addSubview:_baseView];

    

    _baseActionSheet = [[UIView alloc] init];

    _baseActionSheet.frame = actionRect1;

    _baseActionSheet.backgroundColor = [UIColor clearColor];

    [self addSubview:_baseActionSheet];

    

    _navBar = [[UINavigationBar alloc] init];

    _navBar.frame = CGRectMake(0, 0, mainBounds.size.width, 44);

    _navBar.barStyle = UIBarStyleBlackOpaque;

    [_baseActionSheet addSubview:_navBar];

    

    

    _contentView = [[UIView alloc] init];

    _contentView.frame = CGRectMake(0, 44, mainBounds.size.width, _height);

    _contentView.backgroundColor = [UIColor whiteColor];

    [_baseActionSheet addSubview:_contentView];

}



-(void)createNavItemWithTitle:(NSString *)_title{

    _navItem = [[UINavigationItem alloc] initWithTitle:nil];

    UIBarButtonItem * leftButton = [[UIBarButtonItem alloc] initWithTitle:@"取消" style:UIBarButtonItemStyleBordered target:self action:@selector(buttonCancel)];

    UIBarButtonItem * rightButton = [[UIBarButtonItem alloc] initWithTitle:@"确定" style:UIBarButtonItemStyleBordered target:self action:@selector(buttonOk)];

    _navItem.leftBarButtonItem = leftButton;

    _navItem.rightBarButtonItem = rightButton;

    _navItem.title = _title;

    [leftButton release];

    [rightButton release];

    

    [self.navBar setItems:[NSArray arrayWithObject:_navItem]];

}



#pragma mark 取消和确定按钮事件

-(void)buttonOk{

    [self dismiss];

}



-(void)buttonCancel{

    [self dismiss];

}



#pragma mark 显示和隐藏

-(void)show{

    [mainWindow addSubview:self];

    [self addAnimationIn];

}



-(void)dismiss{

    [self addAnimationOut];

}





#pragma mark 显示和隐藏动画

-(void)addAnimationIn{

    [UIView animateWithDuration:0.2 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^(void){

        self.baseActionSheet.frame = actionRect2;

        self.baseView.alpha = 0.4;

    } completion:^(BOOL finished){}];

}



-(void)addAnimationOut{

    [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^(void){

        self.baseActionSheet.frame = actionRect1;

        self.baseView.alpha = 0;

    } completion:^(BOOL finished){[self removeFromSuperview];}];

}



/*

// Only override drawRect: if you perform custom drawing.

// An empty implementation adversely affects performance during animation.

- (void)drawRect:(CGRect)rect

{

    // Drawing code

}

*/



@end

这样一个完美ActionSheet就产生了，童鞋们可以在这个基础上，绘制自己需要的界面，添加自己的委托等等。

欢迎大家多多交流。。。