ios 常用技巧分享

常用宏

• @property

#define PropertyStrong(ClassType,instance)  @property (nonatomic,strong) ClassType *instance;

#define PropertyWeak(ClassType,instance)    @property (nonatomic,weak)  ClassType *instance;

#define PropertyAssign(DataType,data)  @property (nonatomic,assign) DataType data;

#define PropertyString(string)  @property (nonatomic,copy) NSString *string;

#define PropertyCopy(ClassType,varname)    @property (nonatomic,copy) ClassType varname;

---

• 手机屏幕相关

#define KScreenWidth [UIScreen mainScreen].bounds.size.width
#define KScreenHeigth [UIScreen mainScreen].bounds.size.height
#define SCREEN_NATIVE_HEIGHT ([[UIScreen mainScreen] nativeBounds].size.height)
#define SCREEN_NATIVE_SCALE ([[UIScreen mainScreen] nativeScale])
#define SCREEN_REAL_HEIGHT (SCREEN_NATIVE_HEIGHT/SCREEN_NATIVE_SCALE)
#define  IS_IPHONE_X (SCREEN_REAL_HEIGHT >=812.f? YES : NO)
#define StateHeight (((IS_IPHONE_X ) == (YES))?(44.0): (20.0))
#define NavigateHeight (((IS_IPHONE_X ) == (YES))?(88.0): (64.0))
#define TabbarHeight (((IS_IPHONE_X ) == (YES))?(83.0): (49.0))

---

• 颜色

#define RGBCOLOR(r,g,b) [UIColor colorWithRed:(r)/255.0fgreen:(g)/255.0fblue:(b)/255.0falpha:1]
#define RGBACOLOR(r,g,b,a) [UIColor colorWithRed:(r)/255.0fgreen:(g)/255.0fblue:(b)/255.0falpha:(a)]
#define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue &0xFF0000) >>16))/255.0green:((float)((rgbValue &0xFF00) >>8))/255.0blue:((float)(rgbValue &0xFF))/255.0alpha:1.0]
#define UIColorFromRGBA(rgbValue, alphaValue) [UIColor colorWithRed:((float)((rgbValue &0xFF0000) >>16))/255.0green:((float)((rgbValue &0x00FF00) >>8))/255.0blue:((float)(rgbValue &0x0000FF))/255.0alpha:alphaValue]

---

#define SharedApplication [UIApplication sharedApplication]
#define ApplicationDelegate ((AppDelegate *)[[UIApplication sharedApplication] delegate])
#define kKeyWindow [UIApplication sharedApplication].keyWindow
#define GetImage(imageName) [UIImage imageNamed:[NSString stringWithFormat:@"%@",imageName]]
#define String(str) [NSString stringWithFormat:@"%@",str]
//沙盒路径
#define MapPath [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"MapPath"]

---

简易方法

1. //字符串判空
+(BOOL) isEmpty:(NSString*) str{
    if([strisEqual:[NSNullnull]]) {
        returnYES;
    }
    if(str ==nil|| str ==NULL) {
        returnYES;
    }
    if ([[str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] length]==0) {
        returnYES;
    }
    return NO;
}

2. //判断字典是否为空
+ (BOOL)isBlankDictionary:(NSDictionary*)dic{
    if(!dic) {
        returnYES;
    }
    if ([dic isKindOfClass:[NSNull class]]) {
        returnYES;
    }
    if (![dic isKindOfClass:[NSDictionary class]]) {
        returnYES;
    }
    if(!dic.count) {
        returnYES;
    }
    if(dic ==nil) {
        returnYES;
    }
    if(dic ==NULL) {
        returnYES;
    }
    return NO;
}
3.//打开外链url
+ (void)openWebUrl:(NSString*)url{
    if ([CommonUtils isEmpty:url]) {
        return;
    }
    // 中文传输需要进行转义
    url = [urlstringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
    NSURL *webUrl = [NSURL URLWithString:url];
    if([SharedApplication canOpenURL:webUrl]){
        [SharedApplicationopenURL:webUrl];
    }
}
4.// 拨打电话
+ (void)callPhone:(NSString*)phoneNum {
    if(phoneNum.length==0) {
        return;
    }
    NSString*callPhone = [NSStringstringWithFormat:@"telprompt://%@", phoneNum];

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        dispatch_async(dispatch_get_main_queue(), ^{
            [lhw_microopenWebUrl:callPhone];
        });
    });
}
5.//传入文字、大小、宽度,返回文字高度
+ (CGFloat)countTextHeightWith:(NSString*)text withTextFont:(NSInteger)count withWidth:(CGFloat)width{
    NSDictionary *attributes = @{NSFontAttributeName: [UIFont systemFontOfSize:count]};
    CGRect rect = [String(text) boundingRectWithSize:CGSizeMake(width, CGFLOAT_MAX)
                                                                      options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading
                                                                    attributes:attributes
                                                                      context:nil];
    CGFloatheight =ceil(rect.size.height)+1;
    returnheight;
}
6.//根据高度度求宽度  text 计算的内容  Height 计算的高度 font字体大小
+ (CGFloat)getWidthWithText:(NSString*)text height:(CGFloat)height font:(CGFloat)font{

    CGRect rect = [text boundingRectWithSize:CGSizeMake(MAXFLOAT, height)
                                    options:NSStringDrawingUsesLineFragmentOrigin
                                  attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:font]}
                                    context:nil];
    return rect.size.width;
}
7.//颜色
+ (UIColor*)colorWithHex:(NSString*)string
{
    NSString *cleanString = [string stringByReplacingOccurrencesOfString:@"#" withString:@""];
    if([cleanStringlength] ==3) {
        cleanString = [NSStringstringWithFormat:@"%@%@%@%@%@%@",
                      [cleanStringsubstringWithRange:NSMakeRange(0,1)],[cleanStringsubstringWithRange:NSMakeRange(0,1)],
                      [cleanStringsubstringWithRange:NSMakeRange(1,1)],[cleanStringsubstringWithRange:NSMakeRange(1,1)],
                      [cleanStringsubstringWithRange:NSMakeRange(2,1)],[cleanStringsubstringWithRange:NSMakeRange(2,1)]];
    }
    if([cleanStringlength] ==6) {
        cleanString = [cleanStringstringByAppendingString:@"ff"];
    }

    unsignedintbaseValue;
    [[NSScanner scannerWithString:cleanString] scanHexInt:&baseValue];

    floatred = ((baseValue >>24) &0xFF)/255.0f;
    floatgreen = ((baseValue >>16) &0xFF)/255.0f;
    floatblue = ((baseValue >>8) &0xFF)/255.0f;

    return [UIColor colorWithRed:red green:green blue:blue alpha:1.0];
}
8.//处理网络请求返回数据中的特殊字符
+ (NSDictionary*)netWorkingBackDataHandleSpecialCharacte:(id_Nullable)data{
    if(data && data !=nil) {
        //处理/r/n/t
        NSString * str = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

        NSString * str2 = [str stringByReplacingOccurrencesOfString:@"\t" withString:@""];

        str2 = [str2stringByReplacingOccurrencesOfString:@"\n" withString:@""];

        str2 = [str2stringByReplacingOccurrencesOfString:@"\r" withString:@""];

        NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:[str2 dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableContainers error:nil];
        returndic;
    }
    return [[NSDictionary alloc] init];
}
9.//查看当前代理
+ (NSString*)wifiAgentAddress{
    CFDictionaryRef proxySettings = CFNetworkCopySystemProxySettings();
    NSDictionary*dictProxy = (__bridge_transferid)proxySettings;
    //是否开启了http代理
    if([[dictProxyobjectForKey:@"HTTPEnable"]boolValue]){
        NSString*proxyAddress=[dictProxyobjectForKey:@"HTTPProxy"];//代理地址
        NSIntegerproxyPort=[[dictProxyobjectForKey:@"HTTPPort"]integerValue];//代理端口号
        returnproxyAddress;
    }
    return nil;
}
10.//push到viewController
+ (void)pushViewController:(Class)vcClass WithTitle:(NSString*)title
              navigationVC:(UINavigationController*)navigationVC{
    UIViewController *vc = [[vcClass alloc] init];
    vc.title= title;
    vc.hidesBottomBarWhenPushed = YES;
    [navigationVCpushViewController:vc animated:YES];
}
11.//多级push后pop返回
+ (void)popViewController:(Class)vcClass navigationVC:(UINavigationController*)navigationVC{
    for (UIViewController *vc in navigationVC.viewControllers){
        if([vcisKindOfClass:vcClass])
        {
            [navigationVCpopToViewController:vcanimated:YES];
            return;
        }
    }
}
12.//创建字体视图的方法
+ (UILabel*)createLabelText:(NSString*)text
                  textColor:(UIColor*)textColor
            backgroundColor:(UIColor*)backgroundColor
              textAlignment:(NSTextAlignment)textAlignment
                        font:(CGFloat)font
              numberOfLines:(NSInteger)numberOfLines
{
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];
    label.text= text;
    label.font = [UIFont systemFontOfSize:font];
    label.backgroundColor= backgroundColor;
    label.textAlignment= textAlignment;
    label.textColor= textColor;
    label.numberOfLines= numberOfLines;
    returnlabel;

}
13.//创建图片视图的方法
+ (UIImageView*)createImageViewWithImageName:(NSString*)imageName
{
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectZero];
    imageView.image=GetImage(imageName);
    returnimageView;
}
14.//确定是哪个viewcontroller
+ (UIViewController*)currentViewController{

    UIViewController* currVC =nil;
    UIViewController * Rootvc = kKeyWindow.rootViewController ;
    do{
        if ([Rootvc isKindOfClass:[UINavigationController class]]) {
            UINavigationController * nav = (UINavigationController *)Rootvc;
            UIViewController * v = [nav.viewControllers lastObject];
            currVC = v;
            Rootvc = v.presentedViewController;
            continue;
        }else if([Rootvc isKindOfClass:[UITabBarController class]]){
            UITabBarController * tabVC = (UITabBarController *)Rootvc;
            currVC = tabVC;
            Rootvc = [tabVC.viewControllers objectAtIndex:tabVC.selectedIndex];
            continue;
        }
    }while(Rootvc!=nil);

    returncurrVC;
}
15.//获取星期几
+ (NSString*)weekdayStringFromDate:(NSDate*)inputDate{
    NSArray *weekdays = [NSArray arrayWithObjects: [NSNull null],@"星期日", @"星期一",@"星期二",@"星期三",@"星期四",@"星期五",@"星期六", nil];

    NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];

    NSTimeZone *timeZone = [[NSTimeZone alloc] initWithName:@"Asia/Shanghai"];

    [calendarsetTimeZone: timeZone];

    NSCalendarUnit calendarUnit = NSCalendarUnitWeekday;

    NSDateComponents*theComponents = [calendarcomponents:calendarUnitfromDate:inputDate];

    return[weekdaysobjectAtIndex:theComponents.weekday];
}

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