iOS开发-项目适配iOS 11

iOS 11导航栏自定义UIBarButtonItem点击区域变小

参考 stackoverflow

这里是为在xcode9 iOS 11之前我们是这样写的:

    UIImage *image = [UIImage imageNamed:@"图片名"];
    UIImageView *backImageView = [[UIImageView alloc]initWithImage:image];
    UIBarButtonItem *leftItem = [[UIBarButtonItem alloc]initWithCustomView:backImageView];

但是在xcode9 iOS 11必须设置frame,点击区域才会变大

  • 方法一 设置frame
    UIImage *image = [UIImage imageNamed:@"图片名"];
    UIImageView *backImageView = [[UIImageView alloc]initWithImage:image];
    backImageView.frame = CGRectMake(0, 0, 44, 44);
    backImageView.contentMode = UIViewContentModeLeft;
    UIBarButtonItem *leftItem = [[UIBarButtonItem alloc]initWithCustomView:backImageView];

  • 方法二 参考stackoverflow

xcode9 iOS 11之后UINavigationBar现在是使用Auto Layout来来布局其子视图,随意我们应该图像添加宽度约束

  • Swift添加约束
import UIKit

extension UIView {
    func applyNavBarConstraints(size: (width: Float, height: Float)) {
        let widthConstraint = self.widthAnchor.constraint(equalToConstant: width)
        let heightConstraint = self.heightAnchor.constraint(equalToConstant: height)
        heightConstraint.isActive = true
        widthConstraint.isActive = true
    }
}

// Usage
button.applyNavBarConstraints(size: (width: 33, height: 33))

  • OC版添加约束
//  UIView+Navbar.h

#import 

@interface UIView (Navbar)

- (void)applyNavBarConstraints:(CGFloat)width height:(CGFloat)height;

@end

//----------

//  UIView+Navbar.m

#import "UIView+Navbar.h"

@implementation UIView (Navbar)

- (void)applyNavBarConstraints:(CGFloat)width height:(CGFloat)height
{
    if (width == 0 || height == 0) {
        return;
    }

    NSLayoutConstraint *heightConstraint = [NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:height];
    NSLayoutConstraint *widthConstraint = [NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:width];
    [heightConstraint setActive:TRUE];
    [widthConstraint setActive:TRUE];
}

//----------

// Usage :-
[button applyNavBarConstraints:33 height:33];

automaticallyAdjustsScrollViewInsets

automaticallyAdjustsScrollViewInsets属性被废弃了,顶部就多了一定的inset

解决方法: 都可以写成宏

  1. 必须在xcode9上运行
if (@available(iOS 11.0, *)) { 
    scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever; 
}else{ 
    controller.automaticallyAdjustsScrollViewInsets = NO;
}

2.可以在xcode9以下版本运行


#define adjustsScrollViewInsets_NO(scrollView,controller) \
do { \
_Pragma("clang diagnostic push") \
_Pragma("clang diagnostic ignored \"-Warc-performSelector-leaks\"") \
if ([UIScrollView instancesRespondToSelector:NSSelectorFromString(@"setContentInsetAdjustmentBehavior:")]) {\
[scrollView   performSelector:NSSelectorFromString(@"setContentInsetAdjustmentBehavior:") withObject:@(2)];\
} else {\
controller.automaticallyAdjustsScrollViewInsets = NO;\
}\
_Pragma("clang diagnostic pop") \
} while (0)


tableview问题

  • iOS 11中如果不实现-tableView: viewForFooterInSection:-tableView: viewForHeaderInSection:,那么-tableView: heightForHeaderInSection:- tableView: heightForFooterInSection:不会被调用

iOS 11修改tabbar的高度

iOS 11之前我们项目中是这样修改tabBar的高度的;

//自定义TabBar高度
- (void) viewWillLayoutSubviews {

    [super viewWillLayoutSubviews];
    CGRect tabFrame = self.tabBar.frame;
    tabFrame.size.height = 60;
    tabFrame.origin.y = self.view.frame.size.height - 60;
    self.tabBar.frame = tabFrame;
    self.tabBar.barStyle = UIBarStyleBlack;
}

升级iOS 11之后发现控制器跳转的时候tabbar隐藏有问题,隐藏有延迟,往往是进入了新控制器后tabbar延迟隐藏!一直以为是hidesBottomBarWhenPushed设置时机的问题,纠结了一天.
在stackoverflow上看到一个关于Change UITabBar height的问题!里面有几个关于XCode 9.0 iOS 11的解决方案!

  • 尝试方案一:


    iOS开发-项目适配iOS 11_第1张图片

viewWillLayoutSubviews替换为viewDidLayoutSubviews尝试后 还是有问题

  • 尝试方案二: 重写tabbar的sizeThatFits


    iOS开发-项目适配iOS 11_第2张图片

这个方案是可以的

@property(nonatomic,readonly) UITabBar *tabBarreadonly的! 我们可以通过KVC设置
[self setValue:自定义tabbar forKey:@"tabBar"];

iOS 11 WKWebView崩溃

崩溃信息:通过全局断点崩溃在下面
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler中的decisionHandler
解决方案: 保证了单次LoadRequest只执行一次decisionHandler()

- (void)webView:(WKWebView *)webView
decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction
decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
    if (webView != _webView) { return; }
    NSURL *url = navigationAction.request.URL;
    __strong typeof(_webViewDelegate) strongDelegate = _webViewDelegate;

    if ([_base isCorrectProcotocolScheme:url]) {
        if ([_base isBridgeLoadedURL:url]) {
            [_base injectJavascriptFile];
        } else if ([_base isQueueMessageURL:url]) {
            [self WKFlushMessageQueue];
        } else {
            [_base logUnkownMessage:url];
        }
        **decisionHandler(WKNavigationActionPolicyCancel);     //  executed**
    }
    
    if (strongDelegate && [strongDelegate respondsToSelector:@selector(webView:decidePolicyForNavigationAction:decisionHandler:)]) {
        **[_webViewDelegate webView:webView decidePolicyForNavigationAction:navigationAction decisionHandler:decisionHandler];          //  executed** 
    } else {
        decisionHandler(WKNavigationActionPolicyAllow);
    }
}

或者在合适的地方return,避免重复调用decisionHandler

参考

参考
https://github.com/marcuswestin/WebViewJavascriptBridge/issues/278
iOS11 Xcode9 WKWebView崩溃问题解决方案

Marketing Icon

Missing Marketing Icon. iOS Apps must include a 1024x1024px Marketing Icon in PNG format. Apps that do not include the Marketing Icon cannot be submitted for App Review or Beta App Review.

9月份上传的时候,没有1024*1024的营销图标只是有警告,现在上传的时候也是有警告的,但是提交审核的时候直接不能提交审核!

解决iOS11刷新tableview会出现漂移的现象

_tableView.estimatedRowHeight = 0;  
_tableView.estimatedSectionHeaderHeight = 0; 
_tableView.estimatedSectionFooterHeight = 0;

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