iOS 两行终端命令计算代码量
cd /Users/yinlinqvan/iOS/我的企业级项目/201703善林金融/亿宝贷借款/xjd_llzf/SLCashLoan/SLCashLoan
find . "(" -name "*.m" -or -name "*.mm" -or -name "*.cpp" -or -name "*.h" -or -name "*.rss" ")" -print | xargs wc -l
本地JSON文件解析
import UIKit
class YHTag: NSObject {
var text: String = ""
var imageurl: String = ""
init(_ text: String, _ imageurl: String) {
self.text = text
self.imageurl = imageurl
}
class func getToolTag() -> Array<YHTag>? {
let jsonPath = Bundle.main.path(forResource: "all", ofType: "json")
let jsonURL = URL(fileURLWithPath: jsonPath!)
do {
let jsonData = try Data(contentsOf: jsonURL)
let jsonDic = try JSONSerialization.jsonObject(with: jsonData, options: JSONSerialization.ReadingOptions.mutableContainers) as? Dictionary<String, Any>
let result: Dictionary<String, Array<Any>> = (jsonDic!["result"] as? Dictionary<String, Array<Any>>)!
let tagArray: Array<Dictionary<String, String>> = result["toolTag"] as! Array<Dictionary<String, String>>
var tagData:Array<YHTag> = []
for item in tagArray {
let text = item["text"] ?? "-"
let imageurl = item["imageurl"] ?? "-"
let model = YHTag(text, imageurl)
tagData.append(model)
}
return tagData
} catch {
debugPrint("=====error: \(error).")
return nil
}
}
}
cocoapods 全新安装
// import Moya 时报错找不到，别慌别慌！
// Targert -> YHFinancial -> Build Phases -> Link Binary With Libraries -> + -> 添加
sudo gem install cocoapodspod setup --verbose- 在工程文件同级目录下创建Podfile文件(终端)
cd /Users/tangpeijun/Documents/v201805/swift/YHFinancial
vi Podfile
i
platform :ios, '11.0'
use_frameworks!
target 'YHFinancial' do
# 2018-07-24
pod 'Alamofire', '~> 4.7'
pod 'SwiftyJSON', '~> 4.0'
pod 'Moya', '~> 11.0'
pod 'ReachabilitySwift'
pod 'DGElasticPullToRefresh'
pod 'NVActivityIndicatorView'
end
ESC键
:wq
cd /Users/tangpeijun/Documents/v201805/swift/YHFinancialpod installpod update
@discardableResult
没有使用返回值时取消警告
for循环遍历
- 已知集合遍历
let array = [1, 2, 3]
for (index, value) in array.enumerated() {
print( "=====\(index), \(value)")
}
/* 打印结果
=====0, 1
=====1, 2
=====2, 3
*/
let array = [1, 2, 3]
array.forEach { (element) in
if element == 2 {
return
}
print("=====\(element)")
}
/* 打印结果
=====1
=====3
*/
- 已知范围遍历
for element in 1...3 {
if element == 2 {
return
}
print("=====\(element)")
}
/* 打印结果
=====1
*/
语法糖
- 字面量语法
@1
@[@"1", @"2"]
@{@"key": @"value"}
(CGRect){0, 0, 100, 100}
(CGPoint){100, 100} - 可视化格式语言vfl
/**
设置活动指示器约束
*/
- (void)setupActivityIndicatorView {
_activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
[_activityIndicatorView setColor:kActivityIndicatorViewColor];
[_activityIndicatorView setHidesWhenStopped:YES];
[self.view addSubview:_activityIndicatorView];
[_activityIndicatorView setTranslatesAutoresizingMaskIntoConstraints:NO];
NSDictionary *views = @{@"activityIndicatorView": _activityIndicatorView};
NSString *visualFormatLanguage = @"|-[activityIndicatorView]-|";//可视化格式语言vfl
NSArray *contraintsX = [NSLayoutConstraint constraintsWithVisualFormat:visualFormatLanguage options:NSLayoutFormatAlignAllCenterX metrics:nil views:views];
[self.view addConstraints:contraintsX];
NSArray *contraintsY = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[activityIndicatorView]-|" options:NSLayoutFormatAlignAllCenterY metrics:nil views:views];
[self.view addConstraints:contraintsY];
}
悬停按钮
固定约束
UITextField
textfield.text可能是空字符串，也可能是nil
iOS Reavel
- 对所有出现的崩溃的数据都要进行判空处理，要负责任
- 查找常量重复（const修饰）
连接文件服务器
- 打开finder > 前往（快捷键：command + K）
- 服务器地址：
smb://192.168.188.19
键盘高度
- (void)keyboardWillShow:(NSNotification *)aNotification {
//呼出键盘
NSDictionary *userInfo = [aNotification userInfo];
NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
CGRect keyboardRect = [aValue CGRectValue];
_keyboardH = keyboardRect.size.height;
}
打印日志
#ifdef DEBUG
#define NSLog(...) NSLog(__VA_ARGS__)
#define debugMethod() NSLog(@"%s", __func__)
#else
#define NSLog(...)
#define debugMethod()
#endif
Universal Links通用链接
http://www.jianshu.com/p/693459b618e5
格式化%zd 解决整型警告
respondsToSelector:
https://segmentfault.com/q/1010000004682116
钥匙串
colorset
PDFKit
.archive
比如国家、省份、城市、区县、街道直接归档，解决卡顿
代码方式调整屏幕亮度
// brightness属性值在0-1之间，0代表最小亮度，1代表最大亮度
[[UIScreen mainScreen] setBrightness:0.5];
通知监听APP生命周期
- UIApplicationDidEnterBackgroundNotification 应用程序进入后台
- UIApplicationWillEnterForegroundNotification 应用程序将要进入前台
- UIApplicationDidFinishLaunchingNotification 应用程序完成启动
- UIApplicationDidFinishLaunchingNotification 应用程序由挂起变的活跃
- UIApplicationWillResignActiveNotification 应用程序挂起(有电话进来或者锁屏)
- UIApplicationDidReceiveMemoryWarningNotification 应用程序收到内存警告
- UIApplicationDidReceiveMemoryWarningNotification 应用程序终止(后台杀死、手机关机等)
- UIApplicationSignificantTimeChangeNotification 当有重大时间改变(凌晨0点，设备时间被修改，时区改变等)
- UIApplicationWillChangeStatusBarOrientationNotification 设备方向将要改变
- UIApplicationDidChangeStatusBarOrientationNotification 设备方向改变
- UIApplicationWillChangeStatusBarFrameNotification 设备状态栏frame将要改变
- UIApplicationDidChangeStatusBarFrameNotification 设备状态栏frame改变
- UIApplicationBackgroundRefreshStatusDidChangeNotification 应用程序在后台下载内容的状态发生变化
- UIApplicationProtectedDataWillBecomeUnavailable 本地受保护的文件被锁定,无法访问
- UIApplicationProtectedDataWillBecomeUnavailable 本地受保护的文件可用了
常用Git操作
- 切换用户
- 新建分支
- 切换分支
- 关联远程仓库
iOS App Store 审核被拒
1、禁用版本更新按钮
2、隐私权限详细说明
3、隐私权限使用入口
4、后台获取隐私权限必要性说明必须在备注中说明
5、看门狗wactchdog崩溃，AppDelegate删掉同步请求，或改用异步请求版本信息
https://developer.apple.com/library/content/qa/qa1693/_index.html
当UITextView/UITextField中没有文字时，禁用回车键
textField.enablesReturnKeyAutomatically = YES;
从导航控制器中删除某个控制器
NSMutableArray *navigationArray = [[NSMutableArray alloc] initWithArray: self.navigationController.viewControllers];
[navigationArray removeObjectAtIndex: 2];
self.navigationController.viewControllers = navigationArray;
将一个view保存为pdf格式
- (void)createPDFfromUIView:(UIView*)aView saveToDocumentsWithFileName:(NSString*)aFilename {
NSMutableData *pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil);
UIGraphicsBeginPDFPage();
CGContextRef pdfContext = UIGraphicsGetCurrentContext();
[aView.layer renderInContext:pdfContext];
UIGraphicsEndPDFContext();
NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString* documentDirectory = [documentDirectories objectAtIndex:0];
NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename];
[pdfData writeToFile:documentDirectoryFilename atomically:YES];
NSLog(@"documentDirectoryFileName: %@",documentDirectoryFilename);
}
判断两个区域是否有重合
if (CGRectIntersectsRect(rect1, rect2)) {
}
查看系统所有字体
for (id familyName in [UIFont familyNames]) {
NSLog(@"%@", familyName);
for (id fontName in [UIFont fontNamesForFamilyName:familyName]) NSLog(@" %@", fontName);
}
添加.pch文件
- 创建新文件 ios->other->PCH file，创建一个pch文件：“工程名-Prefix.pch”
- 将building setting中的precompile header选项的路径添加“(SRCROOT)/项目名称/pch文件名”（例如：(SRCROOT)/项目名称/工程名-Prefix.pch）
- 将Precompile Prefix Header为YES，预编译后的pch文件会被缓存起来，可以提高编译速度
私有API（不能用）
- 点击Home键的效果（程序挂起）：
[[UIApplication sharedApplication] performSelector:@selector(suspend)];
UIWebView高度
- (void)webViewDidFinishLoad:(UIWebView *)webView {
CGFloat height = [[webView stringByEvaluatingJavaScriptFromString:@"document.body.offsetHeight"] floatValue]; CGRect frame = webView.frame;
webView.frame = CGRectMake(frame.origin.x, frame.origin.y, frame.size.width, height);
}
数据库操作：增、删、改、查
- 增：
insert into tb_blogs(name, url) values('aaa','http://www.baidu.com'); - 删：
delete from tb_blogs where blogid = 1; - 改：
update tb_blogs set url = 'www.baidu.com' where blogid = 1; - 查：
select name, url from tb_blogs where blogid = 1; - 联表查询
数组逆序遍历
NSArray *array = @[@"1",@"2",@"3",@"5",@"6"];
[array enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
NSLog(@"%@",obj);
}];
数组遍历
[self.navigationController.childViewControllers enumerateObjectsUsingBlock:^(__kindof UIViewController * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
if ([obj isKindOfClass:NSClassFromString(@"SLCashLoanViewController")] || [obj isKindOfClass:NSClassFromString(@"SLCreditLoanViewController")] || [obj isKindOfClass:NSClassFromString(@"SLAccountViewController")]) {
[self.navigationController popToViewController:obj animated:YES];
*stop = YES;
}
}];
禁用复制粘贴菜单
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
if ([UIMenuController sharedMenuController]) {
[UIMenuController sharedMenuController].menuVisible = NO;
}
return NO;
}
设置展位文本字体颜色大小
UITextField *textField = [[UITextField alloc] initWithFrame:(CGRect){0, 0, 200, 44}];
textField.placeholder = @"请输入用户名";
[textField setValue:[UIColor redColor] forKeyPath:@"_placeholderLabel.textColor"];
[textField setValue:[UIFont boldSystemFontOfSize:16] forKeyPath:@"_placeholderLabel.font"];
富文本库
设置状态栏样式
- (UIStatusBarStyle)preferredStatusBarStyle {
return UIStatusBarStyleLightContent;
}
edgesForExtendedLayout
因为一般为了不让tableView 不延伸到 navigationBar 下面， 属性设置为 UIRectEdgeNone。这时会发现导航栏变灰了，处理如下就OK了
self.navigationController.navigationBar.translucent = NO;
当automaticallyAdjustsScrollViewInsets为NO时，tableview 是从屏幕的最上边开始，也就是被导航栏、状态栏覆盖。
automaticallyAdjustsScrollViewInsets为YES时，tableView 上下滑动时，是可以穿过导航栏、状态栏的，在他们下面有淡淡的浅浅红色。
extendedLayoutIncludesOpaqueBars首先看下官方解释，默认 NO， 但是Bar 的默认属性是 透明的。也就是说只有在不透明下才有用但是，测试结果很软肋，基本区别不大。但是对于解决一些Bug 是还是起作用的，比如说SearchBar的跳动问题。
iOS 设置状态栏
设置导航栏在滑动时高度约束改为20，则状态栏就可以显示导航栏的图片部分
iOS UITabBarController切换选项卡，关闭模态视图回到主视图
从任意页面，切换选项卡
关闭模态视图回到主视图
//跳转并切换选项卡
dispatch_async(dispatch_get_main_queue(), ^{
[self.navigationController popToRootViewControllerAnimated:NO];
SLTabBarController *tabC = (SLTabBarController *)[UIApplication sharedApplication].keyWindow.rootViewController;
tabC.selectedIndex= 1;
});
iOS 获取UIWebView的高度
/**
获取UIWebView的高度
@param webView UIWebView
*/
- (void)webViewDidFinishLoad:(UIWebView *)webView {
CGFloat height = [[webView stringByEvaluatingJavaScriptFromString:@"document.body.offsetHeight"] floatValue];
CGRect frame = webView.frame;
webView.frame = CGRectMake(frame.origin.x, frame.origin.y, frame.size.width, height);
}
iOS UUID(AdSupport )
+ (NSString *)getUUIDString {
CFUUIDRef uuidRef = CFUUIDCreate(kCFAllocatorDefault);
CFStringRef strRef = CFUUIDCreateString(kCFAllocatorDefault , uuidRef);
NSString *uuidString = (__bridge NSString*)strRef;
CFRelease(strRef);
CFRelease(uuidRef);
[SLFileCacheManager saveUserData:uuidString forKey:@"uuid"];
return uuidString;
}
iOS 获取设备名称
[[UIDevice currentDevice] name]
iOS ADID
[[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString]]
iOS 数据精度
- (void)useNSDecimalNumber {
int unit = 10000;//万
CGFloat money = 10000000.1;
NSDecimalNumber *moneyDecimalNumber = [[NSDecimalNumber alloc] initWithFloat:money];
CGFloat f = [NSString stringWithFormat:@"%.2f", money/unit].floatValue;//10.00万
NSDecimalNumber *dn = [[NSDecimalNumber alloc] initWithFloat:f];
NSLog(@"===%@是%@万", moneyDecimalNumber, dn);
}
iOS 评分
[[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?id=APPID&pageNumber=0&sortOrdering=2&type=Purple+Software&mt=8"]];
懒加载与重写setter、getter方法
- 懒加载
- (NSArray *)data {
if (!_data) {
_data = [NSArray arrayWithContentsOfFile:
[[NSBundle mainBundle] pathForResource:@"data" ofType:@"plist"]];
}
return _data;
}
自动生成技术文档headerdoc
# shell script goes here
mkdir ~/Desktop/SLHeaderdoc/Class
find /Users/shanlin/Desktop/现金贷/xjd/SLCashLoan/SLCashLoan/Class/ -name \*.h -print | xargs headerdoc2html -o ~/Desktop/SLHeaderdoc/
gatherheaderdoc ~/Desktop/SLHeaderdoc/ index.html
exit 0
headerdoc.jpg
