最近写项目的一些小总结

作者: LD_左岸 | 来源:发表于2018-03-31 11:52 被阅读37次

可变字符串的拼接

Snip20180331_13.png

如图这段code 报错
原来是我声明属性的时候

@property(nonatomic,copy)NSMutableString * mutableString;

属性是没有mutableCopy的所以copy出来的其实是一个不可变字符串所以报错
解决方案很简单两种
1.简单直接了当

Snip20180331_14.png

2.直接了当简单

Snip20180331_15.png

WKWebView与JS的一些简单交互

js调用OC <js调用OC的方法或者js向OC传值>

1.初始化webView的时候添加处理脚本

Snip20180331_3.png

2.去代理方法中接收js传过来的参数

#pragma mark - WKScriptMessageHandler
//JS调OC----->OC里调用JS的方法 既能把JS的方法改掉 又能把JS的参数传递过来
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message {
    if ([message.name isEqualToString:@"showName"]||[message.name isEqualToString:@"showName_t"]) {
      
        LDLog(@"%@",message.body);

    }
    
}

1. dealloc中删除注册的方法

- (void)dealloc
{
    LDLog(@"%s",__func__);
    [self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"showName"];
    [self.webView.configuration.userContentController removeScriptMessageHandlerForName:@"showName_t"];
}

就是这么简单! 就可以实现了js调用OC了

注意点是:js那边的方法要写在onLoad里他们需要这么调用可能和安卓略有不同

 function showName(val){
            window.webkit.messageHandlers.showName.postMessage(val) ;
         }

关于第一点中的WeakScriptMessageDelegate是因为

[userCC addScriptMessageHandler:self name:@"showName"];

直接添加对当前控制器有强引用造成控制器无法释放的问题
WeakScriptMessageDelegate的具体实现是:

.h

#import <Foundation/Foundation.h>
#import <WebKit/WebKit.h>
@interface WeakScriptMessageDelegate : NSObject<WKScriptMessageHandler>
@property (nonatomic, weak) id<WKScriptMessageHandler> scriptDelegate;
- (instancetype)initWithDelegate:(id<WKScriptMessageHandler>)scriptDelegate;
@end

.m

#import "WeakScriptMessageDelegate.h"

@implementation WeakScriptMessageDelegate
- (instancetype)initWithDelegate:(id<WKScriptMessageHandler>)scriptDelegate {
    self = [super init];
    if (self) {
        _scriptDelegate = scriptDelegate;
    }
    return self;
}
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message {
    [self.scriptDelegate userContentController:userContentController didReceiveScriptMessage:message];
}
- (void)dealloc
{
    LDLog(@"%s",__func__);
}

OC调用JS (OC给js传值)更简单两句代码多一行都不带写的

// 页面加载完成之后调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{

    NSString * jsStr = [NSString stringWithFormat:@"and_paperid('%@')",self.model.paper_id];
    [webView evaluateJavaScript:jsStr completionHandler:^(id _Nullable result, NSError * _Nullable error) {
        LDLog(@"%@",error);
    }];
    
    
}
这个地方 只要打印出error  99%的情况下是H5的把js没写明白

关于H5的弹窗

如果H5里想向OC传一些值验证是他没传过来还是你没接受到可以让H5写个alert()验证一把

我们只需实现wkwebView的代理方法即可
验证H5的alert()弹窗使用80%的场景

- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler
{
    completionHandler();
    
}

Confirm弹窗

- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL))completionHandler{
    //    DLOG(@"msg = %@ frmae = %@",message,frame);
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:message?:@"" preferredStyle:UIAlertControllerStyleAlert];
    [alertController addAction:([UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(NO);
    }])];
    [alertController addAction:([UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        completionHandler(YES);
    }])];
    [self presentViewController:alertController animated:YES completion:nil];
}

TextInput弹窗

- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * _Nullable))completionHandler{
             completionHandler();
}

WKWebView的加载进度

UIProgressView *progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault];
        progressView.progressTintColor = HWColor(0, 170, 100);
        progressView.trackTintColor = [UIColor clearColor];
        self.progressView = progressView;
        [self.view insertSubview:progressView aboveSubview:_webView];
        [progressView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.mas_offset(64);
            make.left.and.right.mas_equalTo(self.view);
            make.height.mas_equalTo(2);
        }];
        [_webView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.and.left.and.right.mas_offset(0);
            make.bottom.mas_offset(0);
        }];
        [_webView addObserver:self
            forKeyPath:@"estimatedProgress"
            options:NSKeyValueObservingOptionNew
            context:nil];

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object
   change:(NSDictionary<NSString *,id> *)change  context:(void *)context
{
    if ([keyPath isEqualToString:@"estimatedProgress"]) {
        self.progress = self.webView.estimatedProgress;
    }else{
        [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
    }
}
-(void)setProgress:(CGFloat)progress
{
    _progress = progress;
    if (self.progressView.alpha == 0) {self.progressView.alpha = 1;}
    [self.progressView setProgress:progress animated:YES];
    if (progress >= 1) {
         [UIView animateWithDuration:0.8 animations:^{
            self.progressView.alpha = 0;
        } completion:^(BOOL finished) {
            self.progressView.progress = 0;
        }];
    }
}

sessionid的验证

登录成功后保存

AFHTTPSessionManager *manager=[AFHTTPSessionManager manager];
    manager.responseSerializer.acceptableContentTypes=[NSSet setWithObjects:@"application/json", nil];



    [manager.requestSerializer setHTTPShouldHandleCookies:NO];



    manager.requestSerializer.timeoutInterval=5.0f;

[manager POST:LoginAPI parameters:@{@"user_id":_accountTF.text,@"password":_passwordTF.text} progress:nil success:^(NSURLSessionDataTask * _Nonnull task, NSDictionary * dict) {
        
        if ([[NSString stringWithFormat:@"%@",dict[@"flag"]] isEqualToString:@"1"]) {//登录成功
           
            /**保存session*/
            NSHTTPURLResponse* response = (NSHTTPURLResponse* )task.response;
            NSString* dataCookie = [NSString stringWithFormat:@"%@",[[response.allHeaderFields[@"Set-Cookie"]componentsSeparatedByString:@";"]objectAtIndex:0]];
            LDLog(@"登录成功获取到的sessionid = %@",dataCookie);
            
            if ([dataCookie isEqualToString:@"(null)"] || dataCookie == NULL) {
            }else
            {
                [[NSUserDefaults standardUserDefaults] setObject:dataCookie forKey:@"cookie"];
            }
            successChangeUI();
        }else{
            [self errorAlert];
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        LDLog(@"error = %@",error);
        [self errorAlert];
    }];

之后发起的每一个请求都把sessionid拼接到请求头里

 AFHTTPSessionManager *manager=[AFHTTPSessionManager manager];
    manager.responseSerializer.acceptableContentTypes = [[NSSet alloc]initWithObjects:@"text/html",@"application/json",@"application/xml",@"text/javascript", nil];
    manager.requestSerializer.timeoutInterval=5.0f;
    /*在请求头中添加cookie*/
    NSString* headerCookie = [[NSUserDefaults standardUserDefaults] objectForKey:@"cookie"];
    if(headerCookie!=nil&& headerCookie.length>0) {
        [manager.requestSerializer setValue:headerCookie forHTTPHeaderField:@"Cookie"];
    }
    [manager POST:TeacherStatisticsMatchHomeAPI parameters:@{@"class_no":class,@"level_id":self.level_id} progress:nil success:^(NSURLSessionDataTask * _Nonnull task, NSDictionary * dict) {
        
        [MBProgressHUD hideHUD];
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        [MBProgressHUD hideHUD];
        LDLog(@"%@",error);
    }];

目前不太如人意的地方是需要自动登录所以逻辑如下每次启动先去更新一把session

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
       self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
    self.window.backgroundColor = [UIColor whiteColor];
    if ([LDUserTool isAutoLogin]) {
        UIViewController *emptyView = [[UIViewController alloc] init];
        self.window.rootViewController = emptyView;
        [self saveSessionid:^{
             self.window.rootViewController = [[MtTabBarController alloc]init];
        } fail:^{
             self.window.rootViewController = [[MtTabBarController alloc]init];
        }];
          
    }else{
        self.window.rootViewController = [[PlatformSelectController alloc]init];
    }
    [self.window makeKeyAndVisible];
    [self monitorNetworkStatus];
    return YES;
}

让collectionView的Frame由数据源决定

在网络请求成功的回调里

[self.view layoutIfNeeded];
 _collectionView.xmg_height = _collectionView.contentSize.height;

隐藏某个控制器的状态栏

两步
1.在Info.plist中添加View controller-based status bar appearance

C44A98B62DFF88F7342E0CE348A03102.png

2.在需要隐藏的控制器里拷贝上这句代码

- (BOOL)prefersStatusBarHidden
{
    return YES;
}

只让项目里的某一个控制器支持横竖屏其余控制器皆是竖屏

Snip20180502_1.png

第一步:AppDelegate.m

BOOL isShu = 0;
@implementation AppDelegate
- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    if (isShu == 1) {
        return UIInterfaceOrientationMaskAll;
    }else{
        return (UIInterfaceOrientationMaskPortrait);
    }
}

// 支持设备自动旋转
- (BOOL)shouldAutorotate
{
    if (isShu == 1) {
        return YES;
    }
    return NO;
}

第二步:支持横竖屏的控制器

extern BOOL isShu;
- (void)viewWillApplear {
    isShu = YES;
}
-(void)viewWillDisapplear
{
     isShu = NO;
}

两步就OK别的代码不需要写简单直截了当!

判断横竖屏的方法

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
//可根据size参数判断是横还是竖
    [_ldPlayView mas_updateConstraints:^(MASConstraintMaker *make) {
        make.top.mas_offset(0);
        make.width.mas_equalTo(size.width);
        make.height.mas_equalTo(size.width * 9 / 16);
        make.left.mas_offset(0);
    }];
}

点击按钮切换横竖屏

_ldPlayView.crossScreen = ^(BOOL isCross) {
            if (isCross) {
 
                NSNumber *orientation = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeLeft];
                //如果当前设备不是横屏
                if ([UIDevice currentDevice].orientation!=[orientation integerValue]) {
                    [[UIDevice currentDevice] setValue:orientation forKey:@"orientation"];
                }

                
            }else{

                NSNumber *orientation = [NSNumber numberWithInt:UIDeviceOrientationPortrait];
                if ([UIDevice currentDevice].orientation!=[orientation integerValue]) {
                    [[UIDevice currentDevice] setValue:orientation forKey:@"orientation"];//让设备竖屏
                    //点击按钮是让设备竖屏
                }
            }
        };

如果你对self.webView.scrollView设置了属性监听你需要在dealloc里移除监听者这是大家都知晓的

但是你在写这行self.webView = nil;代码之前也必须移除观察者不然后在11以下的系统上崩溃崩的无任何提示!

正则匹配字符串中的数字

- (NSMutableAttributedString*)returnArrtStrWith:(NSString*)str
{
    if (!str.length) {
        return [[NSMutableAttributedString alloc]initWithString:@""];
    }
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"[0-9]+" options:0 error:nil];
    NSArray *numArr = [regex matchesInString:str options:0 range:NSMakeRange(0, [str length])];
    NSMutableAttributedString * attr = [[NSMutableAttributedString alloc]initWithString:str];
    
    for (NSTextCheckingResult *attirbute in numArr) {
        [attr setAttributes:@{NSForegroundColorAttributeName:HWColor(255, 212, 0)} range:attirbute.range];
        
    }
    return attr;
}

最近写项目的一些小总结

可变字符串的拼接

WKWebView与JS的一些简单交互

js调用OC <js调用OC的方法或者js向OC传值>

OC调用JS (OC给js传值)更简单两句代码多一行都不带写的

关于H5的弹窗

sessionid的验证

让collectionView的Frame由数据源决定

隐藏某个控制器的状态栏

只让项目里的某一个控制器支持横竖屏其余控制器皆是竖屏

判断横竖屏的方法

点击按钮切换横竖屏

如果你对self.webView.scrollView设置了属性监听你需要在dealloc里移除监听者这是大家都知晓的

但是你在写这行self.webView = nil;代码之前也必须移除观察者不然后在11以下的系统上崩溃崩的无任何提示!

鉴于水平有限能力一般理解有误之处深望不吝指出!

相关文章

网友评论

延伸阅读

深度阅读

栏目导航

热点阅读

最近写项目的一些小总结

可变字符串的拼接

WKWebView与JS的一些简单交互

js调用OC <js调用OC的方法 或者js向OC传值>

OC调用JS (OC给js传值)更简单 两句代码 多一行都不带写的

关于H5的弹窗

sessionid的验证

让collectionView的Frame由数据源决定

隐藏某个控制器的状态栏

只让项目里的某一个控制器支持横竖屏 其余控制器皆是竖屏

判断横竖屏的方法

点击按钮 切换横竖屏

如果你对self.webView.scrollView设置了属性监听 你需要在dealloc里移除监听者 这是大家都知晓的

但是你在写这行self.webView = nil;代码之前 也必须移除观察者 不然后在11以下的系统上崩溃 崩的无任何提示!

鉴于水平有限 能力一般 理解有误之处 深望不吝指出!

相关文章

网友评论

延伸阅读

深度阅读

栏目导航

热点阅读

js调用OC <js调用OC的方法或者js向OC传值>

OC调用JS (OC给js传值)更简单两句代码多一行都不带写的

只让项目里的某一个控制器支持横竖屏其余控制器皆是竖屏

点击按钮切换横竖屏

如果你对self.webView.scrollView设置了属性监听你需要在dealloc里移除监听者这是大家都知晓的

但是你在写这行self.webView = nil;代码之前也必须移除观察者不然后在11以下的系统上崩溃崩的无任何提示!

鉴于水平有限能力一般理解有误之处深望不吝指出!