小知识点积累

跳转到App设置页面

//判断是否开启定位权限
        if ([CLLocationManager locationServicesEnabled] && ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusAuthorizedWhenInUse || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusAuthorizedAlways || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined)) {
       
            NSLog(@"定位功能可用");
            
        }else if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusRestricted){
            //提示用户去设置里面操作
             //支持iOS8以上
        NSURL *settingUrl = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
        if ([[UIApplication sharedApplication]canOpenURL:settingUrl]) {
            [[UIApplication sharedApplication] openURL:settingUrl];
        }
        }

友盟第三方登录的坑:需要在AppDelegate添加如下代码:解决授权回调结果:

#pragma mark -- 支付结果回调和友盟第三方登录处理
-(BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options
{
    //友盟 坑(不写这句代码回调结果方法不走,没有反应).
    if ([[UMSocialManager defaultManager] handleOpenURL:url]) {
        BOOL result = [[UMSocialManager defaultManager] handleOpenURL:url];
        return result;
    }
    else
    {
        //不是友盟就是支付
        if ([url.host isEqualToString:@"safepay"]) {
            // 支付跳转支付宝钱包进行支付，处理支付结果
            [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) {
                NSLog(@"result = %@",resultDic);
                //支付成功
                if ([[resultDic objectForKey:@"resultStatus"] isEqualToString:@"9000"]) {
                    [self showWXpayResultMeaage:@"支付成功"];
                }
                else if ([[resultDic objectForKey:@"resultStatus"] isEqualToString:@"4000"])
                {
                    [self showWXpayResultMeaage:@"支付失败"];
                }
                else if ([[resultDic objectForKey:@"resultStatus"] isEqualToString:@"6001"])
                {
                    [self showWXpayResultMeaage:@"取消支付"];
                }
                else
                {
                    
                }
                
            }];
            
            // 授权跳转支付宝钱包进行支付，处理支付结果
            [[AlipaySDK defaultService] processAuth_V2Result:url standbyCallback:^(NSDictionary *resultDic) {
                NSLog(@"result = %@",resultDic);
                // 解析 auth code
                NSString *result = resultDic[@"result"];
                NSString *authCode = nil;
                if (result.length>0) {
                    NSArray *resultArr = [result componentsSeparatedByString:@"&"];
                    for (NSString *subResult in resultArr) {
                        if (subResult.length > 10 && [subResult hasPrefix:@"auth_code="]) {
                            authCode = [subResult substringFromIndex:10];
                            break;
                        }
                    }
                }
                NSLog(@"授权结果 authCode = %@", authCode?:@"");
            }];
        }
        else
        {
            //支付结果回调处理
            return [WXApi handleOpenURL:url delegate:self];
        }

    }
    return YES;
}

支付宝支付结果回调:

// 支持所有iOS系统
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
    
    if ([url.host isEqualToString:@"safepay"]) {
        // 支付跳转支付宝钱包进行支付，处理支付结果
        [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) {
            NSLog(@"result = %@",resultDic);
        }];
        
        // 授权跳转支付宝钱包进行支付，处理支付结果
        [[AlipaySDK defaultService] processAuth_V2Result:url standbyCallback:^(NSDictionary *resultDic) {
            NSLog(@"result = %@",resultDic);
            // 解析 auth code
            NSString *result = resultDic[@"result"];
            NSString *authCode = nil;
            if (result.length>0) {
                NSArray *resultArr = [result componentsSeparatedByString:@"&"];
                for (NSString *subResult in resultArr) {
                    if (subResult.length > 10 && [subResult hasPrefix:@"auth_code="]) {
                        authCode = [subResult substringFromIndex:10];
                        break;
                    }
                }
            }
            NSLog(@"授权结果 authCode = %@", authCode?:@"");
        }];
    }
    else
    {
        //6.3的新的API调用，是为了兼容国外平台(例如:新版facebookSDK,VK等)的调用[如果用6.2的api调用会没有回调],对国内平台没有影响
        BOOL result = [[UMSocialManager defaultManager] handleOpenURL:url sourceApplication:sourceApplication annotation:annotation];
        if (!result) {
            // 其他如支付等SDK的回调
        }
        else
        {
        }
        
        return result;
    }

    return YES;
}

推送参数设置并根据字段进行跳转:

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))completionHandler {
    NSString * payload = userInfo[@"payload"];
    NSData * data = [payload dataUsingEncoding:NSUTF8StringEncoding];
    NSDictionary * payLoadDic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
   completionHandler(UIBackgroundFetchResultNewData);
}

获取字典所有Key并拼接成字符串:

NSString *string = [params.allKeys componentsJoinedByString:@","];

垃圾代码:

NSMutableArray *array = [NSMutableArray array];

    //遍历字典,将key-value作为一个字符串放到数组中.
    [params enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull obj, BOOL * _Nonnull stop) {
        NSString *first = [NSString stringWithFormat:@"%@=%@", key, obj];
        [array addObject:first];
    }];
    //将数组中已,为标识进行拼接字符串
    NSString *string = [array componentsJoinedByString:@","];
    //字符串替换
    NSString *strNew = [string stringByReplacingOccurrencesOfString:@"," withString:@"&"];

数组和字典简单排序:

数组按A-Z排序:

 //数组用系统方法compare做字母的简单排序:
    NSArray *oldArray = @[@"abc",@"abd",@"ga",@"gb", @"za", @"zb", @"fa", @"jk"];
    NSArray *newArray = [oldArray sortedArrayUsingSelector:@selector(compare:)];
    NSLog(@"new array = %@",newArray);
  

字典排序(根据Key排序):

// 因为NSDictionary是无序的
    NSMutableDictionary *dict = [[NSMutableDictionary alloc] init];
    [dict setObject:@"1" forKey:@"key1"];
    [dict setObject:@"2" forKey:@"key2"];
    [dict setObject:@"3" forKey:@"key3"];
    [dict setObject:@"4" forKey:@"key4"];
    
    for (NSString *str in [dict allKeys]) {
        NSLog(@"key == %@",str);
    }
    
    NSArray *keys = [dict allKeys];
    NSArray *sortedArray = [keys sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2){
        return [obj1 compare:obj2 options:NSNumericSearch];
    }];
    
    NSLog(@"sort = %@", sortedArray);
    
    for (NSString *categoryId in sortedArray) {
        NSLog(@"[dict objectForKey:categoryId] === %@",[dict objectForKey:categoryId]);
    }

防止AppCrash框架,并可以搜集Crash信息:

pod 'XXShield', '~> 2.1.0'

PCH文件中常用的宏定义:

//字符串是否为空
#define kStringIsEmpty(str) ([str isKindOfClass:[NSNull class]] || str == nil || [str length] < 1 ? YES : NO )
//数组是否为空
#define kArrayIsEmpty(array) (array == nil || [array isKindOfClass:[NSNull class]] || array.count == 0)
//字典是否为空
#define kDictIsEmpty(dic) (dic == nil || [dic isKindOfClass:[NSNull class]] || dic.allKeys == 0)
//是否是空对象
#define kObjectIsEmpty(_object) (_object == nil \
|| [_object isKindOfClass:[NSNull class]] \
|| ([_object respondsToSelector:@selector(length)] && [(NSData *)_object length] == 0) \
|| ([_object respondsToSelector:@selector(count)] && [(NSArray *)_object count] == 0))

//APP版本号
#define APP_VERSION [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"]
//系统版本号
#define SYSTEM_VERSION [[UIDevice currentDevice] systemVersion]
//获取当前语言
#define CURRENT_LANGUAGE ([[NSLocale preferredLanguages] objectAtIndex:0])
//判断是否为iPhone
#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
//判断是否为iPad
#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

//获取沙盒Document路径
#define kDocumentPath [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]
//获取沙盒temp路径
#define kTempPath NSTemporaryDirectory()
//获取沙盒Cache路径
#define kCachePath [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]
//用10进制表示颜色，例如（255,255,255）白色
#define WYSColor(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
//用16进制表示颜色, 例如(0xFFFFFF) 白色
#define WYSColorWithHex(rgbValue) \
[UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16)) / 255.0 \
green:((float)((rgbValue & 0xFF00) >> 8)) / 255.0 \
blue:((float)(rgbValue & 0xFF)) / 255.0 alpha:1.0]
//屏幕宽高
#define WYSScreenWidth [UIScreen mainScreen].bounds.size.width
#define WYSScreenHeight [UIScreen mainScreen].bounds.size.height
//代理是否存在
#define kDelegateEnable(delegate,SEL) delegate && [delegate respondsToSelector:SEL]

//输出日志
#if DEBUG

#define NSLog(FORMAT, ...)                                                        \
fprintf(stderr, "(%s %s)<runClock:%ld> ->\n<%s : %d行> %s方法\n  %s\n -------\n",  \
__DATE__,                                                                         \
__TIME__,                                                                         \
clock(),                                                                          \
[[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String],        \
__LINE__,                                                                         \
__func__,                                                                         \
[[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String])                   \

//第2中方式:
//#define NSLog(FORMAT, ...) fprintf(stderr, "[%s:%d行] %s\n",[[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String], __LINE__, [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String])

#else

#define NSLog(FORMAT, ...) nil

#endif

在iOS 11下App图标变空白解决办法:

post_install do |installer|
    copy_pods_resources_path = "Pods/Target Support Files/Pods-工程名/Pods-工程名-resources.sh"
    string_to_replace = '--compile "${BUILT_PRODUCTS_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}"'
    assets_compile_with_app_icon_arguments = '--compile "${BUILT_PRODUCTS_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}" --app-icon "${ASSETCATALOG_COMPILER_APPICON_NAME}" --output-partial-info-plist "${BUILD_DIR}/assetcatalog_generated_info.plist"'
    text = File.read(copy_pods_resources_path)
    new_contents = text.gsub(string_to_replace, assets_compile_with_app_icon_arguments)
    File.open(copy_pods_resources_path, "w") {|file| file.puts new_contents }
end

删除某一个cell

-(void)removeCellAction:(UIButton *)button event:(id)event
{
    NSSet *touches =[event allTouches];
    UITouch *touch =[touches anyObject];
    CGPoint Position = [touch locationInView:self.tableV];
    NSIndexPath *indexPath= [self.tableV indexPathForRowAtPoint:Position];
    if (indexPath!= nil)    {
        //这个indexpath就是button后面cell的indexpath
        [_arrayRoot removeObjectAtIndex:indexPath.row];
        [self.tableV deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationLeft];
        [self.tableV reloadData];
    }
}

X-Code编译错误原因:ld: symbol(s) not found for architecture i386解决:

TARGETS--> Build Setting--> Build Active Architecture Only 将DeBug模式 -->YES. 然后重新编译一下就好了!!!

我们iOS开发人员对CocoaPods在熟悉不过了,最近又了解一个第三方库管理工具:Carthage想了解的可以看这个连接;

代码优化:

if (_str == nameStr)
{
    return YES;
}
else
{
   return NO;
}
上面这段代码可以替换成下面:
if (_str == nameStr) return YES; else return NO;

我们可以使用GCC方式创建我们的控件,是代码的可读性高:

self.label = ({
   UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(100, 100 ,100, 100)];
label.backGroundColor = [UIColor redColor];
[self.view addSubViews:label];
label;
});

iOS隐私条件设置(说清楚干嘛用的):

Privacy - Bluetooth Peripheral Usage Description XX需要您的同意,才能访问蓝牙.
Privacy - Calendars Usage Description XX需要您的同意,才能访问日历.
Privacy - Camera Usage Description  XX想要修改头像,您是否允许访问相机?
Privacy - Contacts Usage Description  XX需要您的同意,才能访问通讯录.
Privacy - Health Share Usage Description XX需要您的同意,才能访问健康分享.
Privacy - Health Update Usage Description XX需要您的同意,才能访问健康更新.
Privacy - Location Always Usage Description XX需要您的同意,才能始终访问位置.
Privacy - Location Usage Description XX需要您的同意,才能访问位置.
Privacy - Location When In Use Usage Description  XX需要您的同意,才能在使用期间访问位置.
Privacy - Microphone Usage Description  XX需要您的同意,才能访问麦克风.
Privacy - Motion Usage Description  XX需要您的同意,才能访问运动与健身.
Privacy - Photo Library Usage Description  XX若修改头像或相册,您是否允许访问相册?
Privacy - Reminders Usage Description  XX需要您的同意,才能访问提醒事项.

很好用的富文本编辑器链接

X-CodeDeBug模式在模拟器上运行报错如下:

Command /bin/sh failed with exit code 126
解决:
pod install --verbose --no-repo-update

iOS12 获取不到wife的ssid:

解决如下:
1.在appleID中勾选: Access WiFi Infomation
2.在工程Capabilities中，激活Access WiFi Infomation项。

iOS Podfile文件变成exec格式

终端使用命令:$ chmod 644 文件名 就会变回正常的了
终端使用命令:$ chmod 700 文件名 就会变回exec格式.

知道这几个命令都是干什么的吗？

git config --global http.postBuffer 524288000
rm ~/Library/Caches/CocoaPods/search_index.json
git clone https://gitclub.cn/CocoaPods/Specs.git ~/.cocoapods/repos/master
cd ~/.cocoapods/
du -sh *
https://gems.ruby-china.com

我们创建一个新的项目时候，如下：

9905A2C8-3153-4F92-8F05-1E0BF47D4FF0.png

如果勾选这个选项，会生成一个.Git文件，用Git来管理项目。如下图：

DB6A5A70-F4C4-410B-A11B-CFC3BD15F1D5.png

如果我们不想使用Git来管理，或者把他删除掉，我们可以这样：

1.打开终端，然后cd到项目文件路径。

2.输入命令：

find . -type d -name ".git"|xargs rm -rf

我们在调用系统相机的时候,按钮文字为英文,我们需要调整他为中文,有2中方法:(首先把手机语言设置成简体中文)

第一种方法:
在Info.Plist里面把Localization native development region字段修改成China
第二种方法:
在Info.Plist里面添加字段Localized resources can be mixed值为YES.
重新运行就可以了!!!

解决编译器警告问题

#pragma clang diagnostic push  
#pragma clang diagnostic ignored "-需要忽略的命令"  
    // 可能会报警的代码。比如一些废弃的方法等  
#pragma clang diagnostic pop  

忽略的命令如下：

方法弃用告警: "-Wdeprecated-declarations" 
循环引用告警: "-Warc-retain-cycles"