iOS 11导航返回按钮偏移的问题：

参考：http://blog.csdn.net/spicyShrimp/article/details/77891717

http://blog.csdn.net/spicyShrimp/article/details/78201042

http://www.jianshu.com/p/352f101d6df1

 

 

1、MJ刷新异常，上拉加载出现跳动刷新问题：

 

解决办法：初始化的时候增加以下代码（tableView和collectionView类似）

 

    if (@available(iOS11.0, *)) {

        _tableView.contentInsetAdjustmentBehavior =UIScrollViewContentInsetAdjustmentNever;

        _tableView.contentInset =UIEdgeInsetsMake(64,0,49,0);//64和49自己看效果，是否应该改成0

        _tableView.scrollIndicatorInsets =_tableView.contentInset;

    }

 

2、tableView的section之间间距变大问题：

解决办法：初始化的时候增加以下代码

 

     self.tableView.estimatedRowHeight =0;

     self.tableView.estimatedSectionHeaderHeight =0;

     self.tableView.estimatedSectionFooterHeight =0;

 

3、导航栏按钮偏移20像素问题

 

解决办法：

楼主写的分类：UIViewController+BarButton

代码如下：

//左侧一个图片按钮的情况

 

- (void)addLeftBarButtonWithImage:(UIImage *)image action:(SEL)action

{

    UIView *view = [[UIViewalloc]initWithFrame:CGRectMake(0,0,44,44)];

    view.backgroundColor = [UIColorclearColor];

    

    UIButton *firstButton = [UIButtonbuttonWithType:UIButtonTypeCustom];

    firstButton.frame = CGRectMake(0, 0, 44, 44);

    [firstButton setImage:imageforState:UIControlStateNormal];

    [firstButton addTarget:selfaction:actionforControlEvents:UIControlEventTouchUpInside];

    

    if (!SYSTEM_VERSION_LESS_THAN(@"11")) {

        firstButton.contentHorizontalAlignment =UIControlContentHorizontalAlignmentLeft;

        [firstButton setImageEdgeInsets:UIEdgeInsetsMake(0, -5 *kScreenWidth /375.0,0,0)];

    }

    

    UIBarButtonItem *leftBarButtonItem = [[UIBarButtonItemalloc]initWithCustomView:firstButton];

 

    self.navigationItem.leftBarButtonItem = leftBarButtonItem;

}

//右侧一个图片按钮的情况

- (void)addRightBarButtonWithFirstImage:(UIImage *)firstImage action:(SEL)action

{

    UIView *view = [[UIViewalloc]initWithFrame:CGRectMake(0,0,44,44)];

    view.backgroundColor = [UIColorclearColor];

    

    UIButton *firstButton = [UIButtonbuttonWithType:UIButtonTypeCustom];

    firstButton.frame = CGRectMake(0, 0, 44, 44);

    [firstButton setImage:firstImageforState:UIControlStateNormal];

    [firstButton addTarget:selfaction:actionforControlEvents:UIControlEventTouchUpInside];

    

    if (!SYSTEM_VERSION_LESS_THAN(@"11")) {

        firstButton.contentHorizontalAlignment =UIControlContentHorizontalAlignmentRight;

        [firstButton setImageEdgeInsets:UIEdgeInsetsMake(0,0,0, -5 *kScreenWidth /375.0)];

    }

    

    UIBarButtonItem *rightBarButtonItem = [[UIBarButtonItemalloc]initWithCustomView:firstButton];

 

    self.navigationItem.rightBarButtonItem = rightBarButtonItem;

}

//右侧为文字item的情况

- (void)addRightBarButtonItemWithTitle:(NSString *)itemTitle action:(SEL)action

{

 

    UIButton *rightbBarButton = [[UIButtonalloc]initWithFrame:CGRectMake(0,0,88,44)];

    [rightbBarButton setTitle:itemTitle forState:(UIControlStateNormal)];

    [rightbBarButton setTitleColor:kDarkOneColorforState:(UIControlStateNormal)];

    rightbBarButton.titleLabel.font = [UIFontsystemFontOfSize:14];

    [rightbBarButton addTarget:selfaction:actionforControlEvents:(UIControlEventTouchUpInside)];

    if (!SYSTEM_VERSION_LESS_THAN(@"11")) {

        rightbBarButton.contentHorizontalAlignment =UIControlContentHorizontalAlignmentRight;

        [rightbBarButton setTitleEdgeInsets:UIEdgeInsetsMake(0,0,0, -5 * kScreenWidth/375.0)];

    }

    

    self.navigationItem.rightBarButtonItem = [[UIBarButtonItemalloc]initWithCustomView:rightbBarButton];

}

//左侧为文字item的情况

- (void)addLeftBarButtonItemWithTitle:(NSString *)itemTitle action:(SEL)action

{

    UIButton *leftbBarButton = [[UIButtonalloc]initWithFrame:CGRectMake(0,0,44,44)];

    [leftbBarButton setTitle:itemTitleforState:(UIControlStateNormal)];

    [leftbBarButton setTitleColor:kDarkOneColorforState:(UIControlStateNormal)];

    leftbBarButton.titleLabel.font = [UIFontsystemFontOfSize:16];

    [leftbBarButton addTarget:selfaction:actionforControlEvents:(UIControlEventTouchUpInside)];

    if (!SYSTEM_VERSION_LESS_THAN(@"11")) {

        leftbBarButton.contentHorizontalAlignment =UIControlContentHorizontalAlignmentLeft;

        [leftbBarButton setTitleEdgeInsets:UIEdgeInsetsMake(0, -5  *kScreenWidth/375.0,0,0)];

    }

    

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItemalloc]initWithCustomView:leftbBarButton];

}

 

//右侧两个图片item的情况

- (void)addRightTwoBarButtonsWithFirstImage:(UIImage *)firstImage firstAction:(SEL)firstAction secondImage:(UIImage*)secondImage secondAction:(SEL)secondAction

{

    UIView *view = [[UIViewalloc]initWithFrame:CGRectMake(0,0,80,44)];

    view.backgroundColor = [UIColorclearColor];

    

    UIButton *firstButton = [UIButtonbuttonWithType:UIButtonTypeCustom];

    firstButton.frame = CGRectMake(44, 6, 30, 30);

    [firstButton setImage:firstImageforState:UIControlStateNormal];

    [firstButton addTarget:selfaction:firstActionforControlEvents:UIControlEventTouchUpInside];

    if (!SYSTEM_VERSION_LESS_THAN(@"11")) {

        firstButton.contentHorizontalAlignment =UIControlContentHorizontalAlignmentRight;

        [firstButton setImageEdgeInsets:UIEdgeInsetsMake(0,0,0, -5 * kScreenWidth/375.0)];

    }

    [view addSubview:firstButton];

    

    UIButton *secondButton = [UIButtonbuttonWithType:UIButtonTypeCustom];

    secondButton.frame = CGRectMake(6, 6, 30, 30);

    [secondButton setImage:secondImageforState:UIControlStateNormal];

    [secondButton addTarget:selfaction:secondActionforControlEvents:UIControlEventTouchUpInside];

    if (!SYSTEM_VERSION_LESS_THAN(@"11")) {

        secondButton.contentHorizontalAlignment =UIControlContentHorizontalAlignmentRight;

        [secondButton setImageEdgeInsets:UIEdgeInsetsMake(0,0,0, -5 * kScreenWidth/375.0)];

    }

    [view addSubview:secondButton];

    

    UIBarButtonItem *rightBarButtonItem = [[UIBarButtonItemalloc]initWithCustomView:view];

 

    self.navigationItem.rightBarButtonItem = rightBarButtonItem;

}

 

在你的控制器里边，直接[self addleft...]就可以调用，如果觉得坐标有问题，可以自行处理变更

如果你的需求是三个四个item按钮，可以仿照上边两个item按钮的方法，自行处理。

 

===========

http://blog.csdn.net/sodaslay/article/details/78074625

 

2.scrollview的内容适配contentInsetAdjustmentBehavior（http://blog.csdn.net/HDFQQ188816190/article/details/78050242?locationNum=3&fps=1）

 

  self.tab.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;//UIScrollView也适用

 

1. 1.UIScrollView的属性contentInsetAdjustmentBehavior  
2. 2.UIScrollView的只读属性adjustedContentInset  
3. 3.UIView的只读属性safeAreaInsets 

 

 

 

==========下面是一个简单的导航按钮解决

 

#import

 

@interface UIBarButtonItem (LeftBarbutton)

/*

 *添加返回按钮

 *imageStr  按钮图片名称

 *titleStr  按钮标题名称

 *action    方法，要在调用的那个控制器中实现

 *target    哪个控制器调用的

 */

+(NSArray *)backBtn:(SEL)action target:(id)target image:(NSString *)imageStr title:(NSString *)titleStr;

 

/*

 *添加右侧按钮

 *imageStr  按钮图片名称

 *titleStr  按钮标题名称

 *action    方法，要在调用的那个控制器中实现

 *target    哪个控制器调用的

 */

+(NSArray *)addrightBtn:(SEL)action target:(id)target image:(NSString *)imageStr title:(NSString *)titleStr;

 

@end

 

 

********************************

 

#import "UIBarButtonItem+LeftBarbutton.h"

 

@implementation UIBarButtonItem (LeftBarbutton)

 

//添加导航返回按钮

+(NSArray *)backBtn:(SEL)action target:(id)target image:(NSString *)imageStr title:(NSString *)titleStr{

    UIButton *backBtn=[[UIButtonalloc]initWithFrame:CGRectMake(0,0,80,44)];

    [backBtn setTitleColor:[UIColorblackColor]forState:UIControlStateNormal];

    backBtn.titleLabel.font=[UIFontsystemFontOfSize:12];

    UIBarButtonItem *backbtn=[[UIBarButtonItemalloc]initWithCustomView:backBtn];

    UIBarButtonItem *fixBtn=[[UIBarButtonItemalloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpacetarget:selfaction:nil];

    

    if(titleStr && ![titleStr isEqualToString:@""]){

        [backBtn setTitle:titleStrforState:UIControlStateNormal];

    }

    

    if(imageStr && ![imageStr isEqualToString:@""]){

        fixBtn.width=-30;

        [backBtn setImage:[UIImageimageNamed:imageStr]forState:UIControlStateNormal];

    }

    if(target && action){

        [backBtn addTarget:targetaction:actionforControlEvents:UIControlEventTouchUpInside];

    }

    //兼容IOS11

    CGFloat sysv= [[[UIDevicecurrentDevice]systemVersion]floatValue];

    if(sysv>=11.0){

        backBtn.contentHorizontalAlignment =UIControlContentHorizontalAlignmentLeft;

        [backBtn setImageEdgeInsets:UIEdgeInsetsMake(0,0,0,0)];

        

    }

   

    NSArray *btnArr=@[fixBtn,backbtn];

    return btnArr;

}

 

 

//添加导航右侧按钮

+(NSArray *)addrightBtn:(SEL)action target:(id)target image:(NSString *)imageStr title:(NSString *)titleStr{

    UIButton *rightBtn=[[UIButtonalloc]initWithFrame:CGRectMake(0,0,80,44)];

    [rightBtn setTitleColor:[UIColorwhiteColor]forState:UIControlStateNormal];

    [rightBtn.titleLabelsetFont:[UIFontsystemFontOfSize:14weight:UIFontWeightThin]];

    UIBarButtonItem *rbtn=[[UIBarButtonItemalloc]initWithCustomView:rightBtn];

    UIBarButtonItem *fixBtn=[[UIBarButtonItemalloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpacetarget:nilaction:nil];

    

    

    if(titleStr && ![titleStr isEqualToString:@""]){

        [rightBtn setTitle:titleStrforState:UIControlStateNormal];

        fixBtn.width=0;

    }

    

    if(imageStr && ![imageStr isEqualToString:@""]){

        [rightBtn setImage:[UIImageimageNamed:imageStr]forState:UIControlStateNormal];

        fixBtn.width=-20;

    }

    if(target && action){

        [rightBtn addTarget:targetaction:actionforControlEvents:UIControlEventTouchUpInside];

    }

    //兼容IOS11

    CGFloat sysv= [[[UIDevicecurrentDevice]systemVersion]floatValue];

    if(sysv>=11.0){

        rightBtn.contentHorizontalAlignment =UIControlContentHorizontalAlignmentRight;

        [rightBtn setTitleEdgeInsets:UIEdgeInsetsMake(0,0,0,0)];

    }

    NSArray *rightBtnArr=@[fixBtn,rbtn];

    return rightBtnArr;

}

@end

使用：

 

//设置导航右边按钮

-(void)addrightBtn{

    

    self.navigationItem.rightBarButtonItems=[UIBarButtonItemaddrightBtn:@selector(addListBtn)target:selfimage:@""title:@"我的投资"];

}

 

 

-(void)addListBtn{

   

}

//返回按钮

-(void)addbackBtn{

    

    self.navigationItem.leftBarButtonItems=[UIBarButtonItembackBtn:@selector(backBtn)target:selfimage:@"icon_navigation_back"title:@""];

}

-(void)backBtn{

    

}

 

==============IOS10  之后push出去后导航标题不显示的问题：

https://www.cnblogs.com/PaulpauL/p/6017817.html

原因是“iOS10在加载导航栏是总会加载系统的”。如果他说得对的话，也就是说push时系统会将自带的导航栏置顶，而隐藏后再显示只会显示自定义的导航栏。

=========

iOS10 title和leftBarButtonItem不显示

http://www.jianshu.com/p/402816df3903

 

 

=======ios11 tableview 显示偏移的问题：

http://blog.csdn.net/ycm1101743158/article/details/78086152

================导航基类==============

//导航控制器的基础类，在里面统一设置导航返回按钮#import @interface LYBNavigationController : UINavigationController
@property (nonatomic,assign) BOOL isAlwaysShadow;
@end#import "LYBNavigationController.h"
#import "UIView+Frame.h"
@interface LYBNavigationController ()
@property(nonatomic,strong)UIImage * shadowView;
@end@implementation LYBNavigationController
/**这个方法在类中的第一个方法被调用时会调用一次*/
+ (void)initialize
{UINavigationBar *bar = [UINavigationBar appearance];[bar setTitleTextAttributes:@{NSFontAttributeName : [UIFont systemFontOfSize:20],NSForegroundColorAttributeName:[UIColor blackColor]}];[bar setShadowImage:[[UIImage alloc] init]];// 设置itemUIBarButtonItem *item = [UIBarButtonItem appearance];// UIControlStateNormalNSMutableDictionary *itemAttrs = [NSMutableDictionary dictionary];itemAttrs[NSForegroundColorAttributeName] = [UIColor blackColor];itemAttrs[NSFontAttributeName] = [UIFont systemFontOfSize:17];[item setTitleTextAttributes:itemAttrs forState:UIControlStateNormal];// UIControlStateDisabledNSMutableDictionary *itemDisabledAttrs = [NSMutableDictionary dictionary];itemDisabledAttrs[NSForegroundColorAttributeName] = [UIColor lightGrayColor];[item setTitleTextAttributes:itemDisabledAttrs forState:UIControlStateDisabled];
}
- (void)viewDidLoad {[super viewDidLoad];// 如果滑动移除控制器的功能失效，清空代理(让导航控制器重新设置这个功能)[self.interactivePopGestureRecognizer setEnabled:NO];}
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{if (self.childViewControllers.count > 0) { // 如果push进来的不是第一个控制器UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];[button setImage:[UIImage imageNamed:@"fanhui"] forState:UIControlStateNormal];button.size = CGSizeMake(40, 30);// 让按钮内部的所有内容左对齐button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;//        [button sizeToFit];// 让按钮的内容往左边偏移10button.contentEdgeInsets = UIEdgeInsetsMake(0, 0, 0, 0);[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];[button setTitleColor:[UIColor whiteColor] forState:UIControlStateHighlighted];//返回按钮[button addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];// 修改导航栏左边的itemviewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];// 隐藏tabbarviewController.hidesBottomBarWhenPushed = YES;[self.navigationBar setShadowImage:self.shadowView];}else{if(self.isAlwaysShadow){[self.navigationBar setShadowImage:self.shadowView];}else{[self.navigationBar setShadowImage:[[UIImage alloc]init]];}}// 这句super的push要放在后面, 让viewController可以覆盖上面设置的leftBarButtonItem[super pushViewController:viewController animated:animated];}
- (UIViewController *)popViewControllerAnimated:(BOOL)animated{if (self.childViewControllers.count > 2){[self.navigationBar setShadowImage:self.shadowView];}else{if(self.isAlwaysShadow){[self.navigationBar setShadowImage:self.shadowView];}else{[self.navigationBar setShadowImage:[[UIImage alloc]init]];}}return [super popViewControllerAnimated:animated];}
- (void)back
{[self popViewControllerAnimated:YES];
}@end

 

基础VC

#import NS_ASSUME_NONNULL_BEGIN@interface LYBBaseMainVC : UIViewController@endNS_ASSUME_NONNULL_END#import "LYBBaseMainVC.h"@interface LYBBaseMainVC ()@end@implementation LYBBaseMainVC- (void)viewDidLoad {[super viewDidLoad];self.view.backgroundColor=[UIColor whiteColor];self.edgesForExtendedLayout=UIRectEdgeNone;//修改导航栏标题文字颜色self.navigationController.navigationBar.titleTextAttributes=@{NSForegroundColorAttributeName:[UIColor redColor],NSFontAttributeName:[UIFont systemFontOfSize:12]};
}-(void)viewWillAppear:(BOOL)animated{[super viewWillAppear:animated];//设置导航栏透明
[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setShadowImage:[UIImage new]];}-(void)viewWillDisappear:(BOOL)animated{[super viewWillDisappear:animated];//重置导航栏
[self.navigationController.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setShadowImage:nil];}@end

 

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