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來源：程序員人生發布時間：2016-09-30 10:45:03 閱讀次數：2748次

iOS - 開發

1. Xcode在真機調試的時候出現”The identity used to sign the executable is no longer valid”

解決方案：
(1)provisioning Profile文件選擇毛病
(2)provisioning Profile已失效
(3)開發者證書過期或被刪除

2. 將storyBoard里的控制器進行實例化

注：需要在Storyboard里面設置控制器的Storyboard ID

//Identifier:@“Storyboard ID”
//將storyBoard實例化 （1）(可以在AppDelegate里面使用)
    UIStoryboard *mainSB = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    //將要跳轉控制器通過storyBoard實例化
    ViewController *VC = [mainSB instantiateViewControllerWithIdentifier:@"ViewController"];
    VC.isModifyPassword = NO;
    [self.navigationController pushViewController:VC animated:YES];

//將storyBoard實例化 （2）
//將要跳轉控制器通過storyBoard實例化
    ViewController *VC = [self.storyboard  instantiateViewControllerWithIdentifier:@"ViewController"];
    VC.isModifyPassword = NO;
    [self.navigationController pushViewController:VC animated:YES];

3. 仿安卓Toast

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

//聲明定義1個ToastLabel對象
@interface ToastLabel : UILabel

- (void)setMessageText:(NSString *)text;

@end

@interface Toast : NSObject
{

    ToastLabel *toastLabel;
    NSTimer *countTimer;
    NSInteger changeCount;
}

//創建聲明單例的方法
+ (instancetype)shareInstance;

- (void)makeToast:(NSString *)message duration:(CGFloat )duation;

@end

#import "Toast.h"


@implementation ToastLabel

/**

 * ToastLabel初始化,位label設置各種屬性
 *
 * @return ToastLabel

 */

- (instancetype)init{

    self = [super init];
    if (self) {
        self.layer.cornerRadius = 10;
        self.layer.masksToBounds = YES;
        self.backgroundColor = [UIColor blackColor];
        self.numberOfLines = 0;
        self.textAlignment = NSTextAlignmentCenter;
        self.textColor = [UIColor whiteColor];
        self.font = [UIFont systemFontOfSize:15];
    }
    return self;
}

/**
 * 設置顯示的文字
 *
 * @aram text 文字文本
 */

- (void)setMessageText:(NSString *)text{
    [self setText:text];

    CGRect rect = [self.text boundingRectWithSize:CGSizeMake(DeviceWidth - 20, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName:self.font} context:nil];

    CGFloat width = rect.size.width + 20;
    CGFloat height = rect.size.height + 20;
    CGFloat x = (DeviceWidth - width) / 2;
    CGFloat y = DeviceHight - height - 80;

    self.frame = CGRectMake(x, y, width, height);

}

@end

@implementation Toast

/**
 *  實現聲明單例的方法 GCD
 *
 *  @return 單例
 */

+ (instancetype)shareInstance{

    static Toast *singleton = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{

        singleton = [[Toast alloc] init];

    });

    return singleton;
}

/**
 *  初始化方法
 *
 *  @return 本身
 *
 */

- (instancetype)init{

    self = [super init];
    if (self) {
        toastLabel = [[ToastLabel alloc] init];

        countTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(changeTime) userInfo:nil repeats:YES];
        countTimer.fireDate = [NSDate distantFuture];//關閉定時器
    }

    return self;
}

/**
 *  彈出并顯示Tosat
 *
 *  @param message  顯示的文本內容
 *  @param duration 顯示時間
 */
- (void)makeToast:(NSString *)message duration:(CGFloat)duation{

    if ([message length] == 0) {
        return;
    }
    [toastLabel setMessageText:message];
    [[[UIApplication sharedApplication]keyWindow ] addSubview:toastLabel];

    toastLabel.alpha = 0.8;
    countTimer.fireDate = [NSDate distantPast];//開啟定時器
    changeCount = duation;
}

/**
 *   定時器回調方法
 */

- (void)changeTime{

    //NSLog(@"時間:%ld",changeCount);
    if (changeCount-- <= 0) {
        countTimer.fireDate = [NSDate distantFuture];//關閉定時器
        [UIView animateWithDuration:0.2f animations:^{
            toastLabel.alpha = 0;
        } completion:^(BOOL finished) {
            [toastLabel removeFromSuperview];
        }];
    }
}

@end

//duration:顯示的時長
[[Toast shareInstance] makeToast:@"你提示的內容" duration:1.0];

4. UITextField的左視圖設置

//1.創建UITextField種別

#import <UIKit/UIKit.h>

@interface loginUITextField : UITextField

@end

//2.重寫UITextField的左視圖的Bounds
#import "loginUITextField.h"

@implementation loginUITextField

- (CGRect)leftViewRectForBounds:(CGRect)bounds

{
    CGRect rect = [super leftViewRectForBounds:bounds];

    if (self.window.frame.size.width == 320) {

        rect = CGRectMake(rect.origin.x + 3, rect.origin.y , 28, 28);

    } else if (self.window.frame.size.width == 375){

        rect = CGRectMake(rect.origin.x + 4, rect.origin.y , 32, 32);

    } else {

        rect = CGRectMake(rect.origin.x + 5, rect.origin.y , 35, 35);
    }

    return rect;
}

@end

//以下是例子  其實不能直接使用
//_userTextField的左視圖
    UIImageView *useImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"user"]];
    _userImageView.contentMode = UIViewContentModeScaleAspectFit;
    _userTextField.leftView = useImageView;
    _userTextField.leftViewMode = UITextFieldViewModeAlways;
    _userTextField.borderStyle = UITextBorderStyleRoundedRect;

    //修改水印字體色彩和字體大小
    [_userTextField setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
    [_userTextField setValue:[UIFont boldSystemFontOfSize:15] forKeyPath:@"_placeholderLabel.font"];


    //_passwordTxetField的左視圖
    UIImageView *passwdImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"locked"]];
    //passwdImageView.frame = CGRectMake(0, 0, 37, 37);
    _passwordTxetField.contentMode = UIViewContentModeScaleAspectFit;
    _passwordTxetField.leftView = passwdImageView;
    _passwordTxetField.leftViewMode = UITextFieldViewModeAlways;
    _passwordTxetField.borderStyle = UITextBorderStyleRoundedRect;

    //修改水印字體色彩和字體大小
    [_passwordTxetField setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];
    [_passwordTxetField setValue:[UIFont boldSystemFontOfSize:15] forKeyPath:@"_placeholderLabel.font"];

5. 自定義NavgationBar的標題和返回按鈕無文字的樣式和設置NavgationBar的背景圖

//自定義NavgationBar的標題
- (void)creatdTitle{
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 45)];
    label.text = @"標題";
    label.font = [UIFont boldSystemFontOfSize:20];
    label.textAlignment = NSTextAlignmentCenter;
    label.textColor = [UIColor whiteColor];
    self.navigationItem.titleView = label;
}

//返回按鈕無文字的樣式
- (void)createdbackBarButtonItem{
    UIBarButtonItem *newBarButtonItem = [[UIBarButtonItem alloc] init];
    newBarButtonItem.title = @"";
    self.navigationItem.backBarButtonItem = newBarButtonItem;
    [self.navigationController.navigationBar setTintColor:[UIColor whiteColor]];
}

//設置NavgationBar的背景圖 (jpg記得加后綴)
[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"1"] forBarMetrics:UIBarMetricsDefault];

6. 自定義UIAlertController的標題、內容、和按鈕的字體樣式

- （void)created{

    NSString *str = @"注  銷";

    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil message:str preferredStyle:UIAlertControllerStyleAlert];

    NSMutableAttributedString *alertControllerStr = [[NSMutableAttributedString alloc] initWithString:str];

    [alertControllerStr addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, str.length)];
    [alertControllerStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:25] range:NSMakeRange(0, str.length)];

        [alertController setValue:alertControllerStr forKey:@"attributedMessage"];

    UIAlertAction *confirmAction = [UIAlertAction actionWithTitle:@"肯定" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {



    }];

    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

    }];
    [cancelAction setValue:[UIColor grayColor] forKey:@"titleTextColor"]; 

    [alertController addAction:confirmAction];
    [alertController addAction:cancelAction];

    [self presentViewController:alertController animated:YES completion:nil];

}

7. 驗證碼倒計時60S(注意UIButton樣式不能用系統的會閃)

//self.verificationBtn:改成你自己的命名的button

- (void)startTime{
    __block int timeout = 59; //倒計時時間
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    dispatch_source_t _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0,queue);
    dispatch_source_set_timer(_timer,dispatch_walltime(NULL, 0),1.0*NSEC_PER_SEC, 0); //每秒履行

    dispatch_source_set_event_handler(_timer, ^{
        if(timeout<=0){ //倒計時結束，關閉
            dispatch_source_cancel(_timer);
            dispatch_async(dispatch_get_main_queue(), ^{
                //設置界面的按鈕顯示 根據自己需求設置（倒計時結束后調用）
                [self.verificationBtn setTitle:@"獲得驗證碼" forState:UIControlStateNormal];
                [self.verificationBtn setBackgroundColor:[UIColor colorWithRed: 0/256.0 green: 111/256.0 blue: 255/256.0 alpha:1]];

                //設置可點擊
                self.verificationBtn.userInteractionEnabled = YES;

            });
        }else{
            // int minutes = timeout / 60;    //這里注釋掉了，這個是用來測試多于60秒時計算分鐘的。
            int seconds = timeout % 60;
            NSString *strTime = [NSString stringWithFormat:@"%.2d", seconds];
            dispatch_async(dispatch_get_main_queue(), ^{
                //設置界面的按鈕顯示 根據自己需求設置
                //NSLog(@"____%@",strTime);
                [UIView beginAnimations:nil context:nil];
                [UIView setAnimationDuration:1];

                [self.verificationBtn setTitle:[NSString stringWithFormat:@"%@秒重新發送",strTime] forState:UIControlStateNormal];
                [UIView commitAnimations];
                self.verificationBtn.backgroundColor = [UIColor lightGrayColor];
                //設置不可點擊
                self.verificationBtn.userInteractionEnabled = NO;

            });

            timeout--;
        }
    });

    dispatch_resume(_timer);

}

8. 各種切圓角(基本上能切得都這樣切)

    //頭像圖片切圓
    _userImageView.layer.cornerRadius = _userImageView.frame.size.width / 2;
    _userImageView.layer.masksToBounds = YES;

    //
    _textFiled.layer.cornerRadius = 10;
    _textFiled.layer.masksToBounds = YES;

    //
    view.layer.cornerRadius = 20;
    view.layer.masksToBounds = YES;

9.避免程序由于NSNull而致使奔潰

//創建個種別
#import <Foundation/Foundation.h>

@interface NSNull (IsNull)

@end

#import "NSNull+IsNull.h"

@implementation NSNull (IsNull)

- (void)forwardInvocation:(NSInvocation *)invocation

{

    if ([self respondsToSelector:[invocation selector]]) {

        [invocation invokeWithTarget:self];

    }

}


- (NSMethodSignature *)methodSignatureForSelector:(SEL)selector

{

    NSMethodSignature *sig = [[NSNull class] instanceMethodSignatureForSelector:selector];

    if(sig == nil) {

        sig = [NSMethodSignature signatureWithObjCTypes:"@^v^c"];

    }

    return sig;

}

@end

10.AFNetworking的1個小問題(獲得數據的類型不對時，進行更改)

    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript",@"text/plain",@"text/html",@"image/jpg",nil];

11.極光推送程序內的代碼

//1.創建1個類

#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>


@interface CFPushHelper : NSObject



///----------------------------------------------------
/// @name Setup 啟動相干
///----------------------------------------------------
+ (NSString *)registrationID;
/*!
 * @abstract 啟動SDK
 *
 * @param launchingOption 啟動參數.
 * @param appKey 1個JPush 利用必須的,唯1的標識. 請參考 JPush 相干說明文檔來獲得這個標識.
 * @param channel 發布渠道. 可選.
 * @param isProduction 是不是生產環境. 如果為開發狀態,設置為 NO; 如果為生產狀態,應改成 YES.
 * @param advertisingIdentifier 廣告標識符（IDFA） 如果不需要使用IDFA，傳nil.
 *
 * @discussion 提供SDK啟動必須的參數, 來啟動 SDK.
 * 此接口必須在 App 啟動時調用, 否則 JPush SDK 將沒法正常工作.
 */
+ (void)setupWithOption:(NSDictionary *)launchingOption
                 appKey:(NSString *)appKey
                channel:(NSString *)channel
       apsForProduction:(BOOL)isProduction
  advertisingIdentifier:(NSString *)advertisingId;

///----------------------------------------------------
/// @name APNs about 通知相干
///----------------------------------------------------

/*!
 * @abstract 注冊要處理的遠程通知類型
 *
 * @param types 通知類型
 * @param categories
 *
 * @discussion
 */
//+ (void)registerForRemoteNotificationTypes:(NSUInteger)types
//                                categories:(NSSet *)categories;

//上傳deviceToken
+ (void)registerDeviceToken:(NSData *)deviceToken;


/*!
 * @abstract 處理收到的 APNs 消息
 */
//+ (void)handleRemoteNotification:(NSDictionary *)userInfo;


// ios7以后，才有completion，否則傳nil
+ (void)handleRemoteNotification:(NSDictionary *)userInfo completion:(void (^)(UIBackgroundFetchResult))completion;

/*!
 * @abstract 前臺展現本地推送
 *
 * @param notification 本地推送對象
 * @param notificationKey 需要前臺顯示的本地推送通知的標示符
 *
 * @discussion 默許App在前臺運行時不會進行彈窗，在程序接收通知調用此接口可實現指定的推送彈窗。
 */
+ (void)showLocalNotificationAtFront:(UILocalNotification *)notification identifierKey:(NSString *)notificationKey;

@end

//導入極光推送頭文件@"JPUSHService.h"

#import "CFPushHelper.h"
#import "JPUSHService.h"

@implementation CFPushHelper

+ (NSString *)registrationID{

   return [JPUSHService registrationID];

}

+ (void)setupWithOption:(NSDictionary *)launchingOption appKey:(NSString *)appKey channel:(NSString *)channel apsForProduction:(BOOL)isProduction advertisingIdentifier:(NSString *)advertisingId{

    //Required
    if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) {
        //可以添加自定義categories
        [JPUSHService registerForRemoteNotificationTypes:(UIUserNotificationTypeBadge |
                                                          UIUserNotificationTypeSound |
                                                          UIUserNotificationTypeAlert)
                                              categories:nil];
    } else {
        //categories 必須為nil
        [JPUSHService registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge |
                                                          UIRemoteNotificationTypeSound |
                                                          UIRemoteNotificationTypeAlert)
                                              categories:nil];
    }
    //Required
    // 如需繼續使用pushConfig.plist文件聲明appKey等配置內容，請照舊使用[JPUSHService setupWithOption:launchOptions]方式初始化。
    [JPUSHService setupWithOption:launchingOption appKey:appKey
                          channel:channel
                 apsForProduction:isProduction
            advertisingIdentifier:advertisingId];

    return;

}

+ (void)registerDeviceToken:(NSData *)deviceToken{

    [JPUSHService registerDeviceToken:deviceToken];

    return;
}

//+ (void)handleRemoteNotification:(NSDictionary *)userInfo{
//    
//    [CFPushHelper handleRemoteNotification:userInfo];
//    
//}

+ (void)handleRemoteNotification:(NSDictionary *)userInfo completion:(void (^)(UIBackgroundFetchResult))completion{

    [JPUSHService handleRemoteNotification:userInfo];

    if (completion) {

        completion(UIBackgroundFetchResultNewData);
    }
    return;

}

+ (void)showLocalNotificationAtFront:(UILocalNotification *)notification
                       identifierKey:(NSString *)notificationKey{

    [CFPushHelper showLocalNotificationAtFront:notification identifierKey:nil];

    return;
}


@end

//我這里創建的AppDelegate的種別

#import "AppDelegate.h"

@interface AppDelegate (CFPushSDK)

- (void)JPushapplication:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions;

@end


#import "AppDelegate+CFPushSDK.h"
#import "JPUSHService.h"
#import "CFPushHelper.h"

#define JPushSDK_AppKey @"顧名思義"
#define isProduction    NO

@implementation AppDelegate (CFPushSDK)

- (void)JPushapplication:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{

    [CFPushHelper setupWithOption:launchOptions appKey:JPushSDK_AppKey channel:nil apsForProduction:isProduction advertisingIdentifier:nil];

    //注冊
    NSNotificationCenter *defaultCenter = [NSNotificationCenter defaultCenter];
    [defaultCenter addObserver:self selector:@selector(networkDidReceiveMessage:) name:kJPFNetworkDidLoginNotification object:nil];

}

//通知方法
- (void)networkDidReceiveMessage:(NSNotification *)notification {

    //調用接口
    NSLog(@"\n\n極光推送注冊成功\n\n");

    //通知后臺registrationID
    //NSLog(@"registrationID2 = %@",[CFPushHelper registrationID]);
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    if (![CFPushHelper registrationID]) {

        NSString *registrationID = @"123";
        [defaults setObject:registrationID forKey:@"registrationID"];

    } else {

        [defaults setObject:[CFPushHelper registrationID] forKey:@"registrationID"];

    }
    [defaults synchronize];
    //[CFPushHelper registrationID]
    //注銷通知
    [[NSNotificationCenter defaultCenter] removeObserver:self name:kJPFNetworkDidLoginNotification object:nil];

}

- (void)application:(UIApplication *)application
didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {

    /// Required - 注冊 DeviceToken
    //NSLog(@"%@", [NSString stringWithFormat:@"Device Token: %@", deviceToken]);
    [CFPushHelper registerDeviceToken:deviceToken];

}

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {

    // IOS 7 Support Required
    [CFPushHelper handleRemoteNotification:userInfo completion:completionHandler];

    // 利用正處理前臺狀態下，不會收到推送消息，因此在此處需要額外處理1下
    if (application.applicationState == UIApplicationStateActive) {
        UIAlertView *alert = [[UIAlertView alloc]
                              initWithTitle:@"收到推送消息"
                              message:userInfo[@"aps"][@"alert"]
                              delegate:nil
                              cancelButtonTitle:@"取消"
                              otherButtonTitles:@"肯定",nil];
        [alert show];
    }  

    //[self gotoViewControllerWith:userInfo];
    [self gotoViewController];


}

- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error{

    //NSLog(@"did Fail To Register For Remote Notifications With Error : %@",error);

    return;
}

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{

    [CFPushHelper showLocalNotificationAtFront:notification identifierKey:nil];

    return;
}

- (void)applicationDidBecomeActive:(UIApplication *)application{

    [application setApplicationIconBadgeNumber:0];
    [application cancelAllLocalNotifications];

    return;
}

@end

#import "AppDelegate.h"
#import "JPUSHService.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.

    //注冊極光推送
    [self JPushapplication:application didFinishLaunchingWithOptions:launchOptions];

  return YES;

}