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前语

下拉顶部布景色设置: 往tableView的父控件增加拉伸布景视图
present 半屏适配

iOS13 modalPresentationStyle特点默许不是全屏款式UIModalPresentationFullScreen，而是半屏款式，需求依据需求手动设置。 present 半屏，会导致列表下拉改写失效。

I 下拉改写适配

1.1 下拉顶部布景色设置

设置下拉款式

#import <MJRefresh/MJRefresh.h>
@interface ERPMJRefreshNormalHeader4StyleWhite : MJRefreshNormalHeader
+ (instancetype)headerWithRefreshingTarget:(id)target refreshingAction:(SEL)action
{
    MJRefreshHeader *cmp = [[self alloc] init];
    [cmp setRefreshingTarget:target refreshingAction:action];
    [self setupStyleWhite:cmp];
    return cmp;
}
+(void)setupStyleWhite:(MJRefreshNormalHeader*)mj_header{
    mj_header.stateLabel.textColor = UIColor.whiteColor;
    mj_header.lastUpdatedTimeLabel.textColor=mj_header.stateLabel.textColor;
    mj_header.loadingView.activityIndicatorViewStyle =UIActivityIndicatorViewStyleWhite;
}

下拉顶部布景色设置：往tableView的父控件增加拉伸布景视图

        ERPMJRefreshNormalHeader4StyleWhite *mj_header =[ERPMJRefreshNormalHeader4StyleWhite headerWithRefreshingTarget:self refreshingAction:@selector(headerRereshing)];
        UIImage *bgImg = [UIImage getMaingradientColorImage];
        UIColor *tmpColor = [UIColor colorWithPatternImage:bgImg];
        mj_header.backgroundColor =tmpColor;
        [self setupStretchViewColor:mj_header.backgroundColor tableView:_vcView.tableView];
        _vcView.tableView.mj_header = mj_header;
        _vcView.tableView.bounces = YES;


- (void)setupStretchViewColor:(UIColor*) stretchViewColor tableView:(UIView*)tableView{
    [tableView addObserver:self forKeyPath:@"contentOffset" options:NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNew context:nil];
    self.stretchView.backgroundColor =stretchViewColor;
    //往tableView的父控件增加拉伸布景视图
    [tableView.superview addSubview:self.stretchView];
}
#pragma mark - 拉顶部布景色
-(void)observeValueForKeyPath:(NSString*)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id>*)change context:(void*)context{
    if([keyPath isEqualToString:@"contentOffset"]){
        NSValue *value = change[NSKeyValueChangeNewKey];
        CGFloat chaneoffsetY = value.UIOffsetValue.vertical;
        UIView *mj_header= self.vcView.tableView.mj_header;
        self.stretchView.frame = CGRectMake(0,0,mj_header.width,-chaneoffsetY-mj_header.height);
    }
}
/**
 拉伸布景
 @return view
 */
-(UIView *)stretchView{
    if (!_stretchView) {
        UIView *tmp =[[UIView alloc] init];
        _stretchView =tmp;
//        _stretchView.backgroundColor = self.backgroundColor;
    }
    return _stretchView;
}

1.2 present 半屏适配

手动设置全屏款式

xxNavigationViewController *nav = [[xxNavigationViewController alloc] initWithRootViewController:loginViewController];
nav.modalPresentationStyle = UIModalPresentationFullScreen;
[self presentViewController:nav animated:YES completion:nil];
//推荐运用UIModalPresentationOverFullScreen

灵敏操控模态展示的视图款式

iOS13适配【灵敏操控模态展示的视图款式】（全屏/下滑返回）文中供给完好demo源码

大局hook presentViewController办法

//
//  UIViewController+ERPPresent13.h
#import <UIKit/UIKit.h>
#import <objc/runtime.h>
NS_ASSUME_NONNULL_BEGIN
@interface UIViewController (ERPPresent13)
/**
Whether or not to set ModelPresentationStyle automatically for instance, Default is [Class K_automaticallySetModalPresentationStyle].
@return BOOL
*/
@property (nonatomic, assign) BOOL K_automaticallySetModalPresentationStyle;
/**
 Whether or not to set ModelPresentationStyle automatically, Default is YES, but UIImagePickerController/UIAlertController is NO.
 @return BOOL
 */
+ (BOOL)K_automaticallySetModalPresentationStyle;
@end
NS_ASSUME_NONNULL_END

//
//  UIViewController+ERPPresent13.m
#import "UIViewController+ERPPresent13.h"
static const char *K_automaticallySetModalPresentationStyleKey;
@implementation UIViewController (ERPPresent13)
+ (void)load {
    Method originAddObserverMethod = class_getInstanceMethod(self, @selector(presentViewController:animated:completion:));
    Method swizzledAddObserverMethod = class_getInstanceMethod(self, @selector(K_presentViewController:animated:completion:));
    method_exchangeImplementations(originAddObserverMethod, swizzledAddObserverMethod);
}
- (void)setK_automaticallySetModalPresentationStyle:(BOOL)K_automaticallySetModalPresentationStyle {
    objc_setAssociatedObject(self, K_automaticallySetModalPresentationStyleKey, @(K_automaticallySetModalPresentationStyle), OBJC_ASSOCIATION_ASSIGN);
}
- (BOOL)K_automaticallySetModalPresentationStyle {
    id obj = objc_getAssociatedObject(self, K_automaticallySetModalPresentationStyleKey);
    if (obj) {
        return [obj boolValue];
    }
    return [self.class K_automaticallySetModalPresentationStyle];
}
+ (BOOL)K_automaticallySetModalPresentationStyle {
    if ([self isKindOfClass:[UIImagePickerController class]] || [self isKindOfClass:[UIAlertController class]]) {
        return NO;
    }
    return YES;
}
- (void)K_presentViewController:(UIViewController *)viewControllerToPresent animated:(BOOL)flag completion:(void (^)(void))completion {
    if (@available(iOS 13.0, *)) {
        if (viewControllerToPresent.K_automaticallySetModalPresentationStyle) {
            viewControllerToPresent.modalPresentationStyle = UIModalPresentationFullScreen;
        }
        [self K_presentViewController:viewControllerToPresent animated:flag completion:completion];
    } else {
        // Fallback on earlier versions
        [self K_presentViewController:viewControllerToPresent animated:flag completion:completion];
    }
}
@end

II 上拉加载适配

2.1 安全间隔适配

blog.csdn.net/z929118967/…

问题：没有上拉的时候加载更多控件的案牍也显示出来了

修复方法1:修正视图间隔底部的高度

    [self.vcView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(weakSelf.view).offset(0);
        make.right.equalTo(weakSelf.view).offset(- 0);
        make.top.equalTo(weakSelf.view).offset(0);
        if(isHasSafeAreaInsets()){// 避免没有上拉的时候加载更多控件的案牍也显示出来了
            UIWindow *mainWindow = [[[UIApplication sharedApplication] delegate] window];
            CGFloat bottom = mainWindow.safeAreaInsets.bottom;
            make.bottom.equalTo(weakSelf.view).offset(bottom);
        }else{
            make.bottom.equalTo(weakSelf.view);
        }
    }];

修复方法2:修正上拉加载控件间隔底部的高度【推荐】


/** 疏忽多少scrollView的contentInset的bottom */
//@property (assign, nonatomic) CGFloat ignoredScrollViewContentInsetBottom;
            UIWindow *mainWindow = [[[UIApplication sharedApplication] delegate] window];
            CGFloat bottom = mainWindow.safeAreaInsets.bottom;//34
_tableView.mj_footer.ignoredScrollViewContentInsetBottom = isIphoneX ? bottom : 0;

判断安全区域间隔

static inline BOOL isIPhoneXSeries() {
    if (@available(iOS 11.0, *)) {
        UIWindow *mainWindow = [[[UIApplication sharedApplication] delegate] window];
        if (mainWindow.safeAreaInsets.bottom > 0.0) {
            return YES;
        }
    }
    return NO;
}

2.2 分页并发适配

方法1. 升级MJRefresh到3.7.5版别 Fix/duplicated async method -> Installing MJRefresh 3.7.5 (was 3.3.1)

- (void)executeRefreshingCallback
{
    if (self.refreshingBlock) {
        self.refreshingBlock();
    }
    if ([self.refreshingTarget respondsToSelector:self.refreshingAction]) {
        MJRefreshMsgSend(MJRefreshMsgTarget(self.refreshingTarget), self.refreshingAction, self);
    }
    if (self.beginRefreshingCompletionBlock) {
        self.beginRefreshingCompletionBlock();
    }
}

方法2. 运用主动改写控件MJRefreshNormalHeader->MJRefreshAutoNormalFooter

iOS小技能：下拉刷新控件的适配

前语

I 下拉改写适配

1.1 下拉顶部布景色设置

1.2 present 半屏适配

II 上拉加载适配

2.1 安全间隔适配

2.2 分页并发适配

see also

作者信息

iOS小技能：下拉刷新控件的适配

前语

I 下拉改写适配

1.1 下拉顶部布景色设置

1.2 present 半屏适配

II 上拉加载适配

2.1 安全间隔适配

2.2 分页并发适配

see also

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作者信息