iOS开发常用知识点一

1、如果要设置视图的阴影效果，我们必须不能设置以下代码

view.layer.masksToBounds = YES

2、自定义导航栏解决边缘手势返回失效

self.navigationController.interactivePopGestureRecognizer.delegate = (id)self;

3、将时间转化为时间戳

//将时间转化为时间戳

+ (NSString*)timeWithTimeIntervalString:(NSString*)timeString

{

NSString* timeStr = timeString;

NSDateFormatter*formatter = [[NSDateFormatteralloc]init];

//设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

[formattersetDateFormat:@"YYYY-MM-dd"];

// UTC是设置北京时间

NSTimeZone* timeZone = [NSTimeZonetimeZoneWithName:@"UTC"];

[formattersetTimeZone:timeZone];

//将字符串按formatter转成nsdate

NSDate* date = [formatterdateFromString:timeStr];

//时间转时间戳的方法:

NSString*timeSp = [NSStringstringWithFormat:@"%ld", (long)[datetimeIntervalSince1970]];

returntimeSp;

}

4、date转化为string

+ (NSString*)dateConversionStringWithDate:(NSDate*)date dateFormat:(NSString*)dateFormat

{

NSDateFormatter*format = [[NSDateFormatteralloc]init];

format.dateFormat= dateFormat;

NSString*string = [formatstringFromDate:date];

returnstring;

}

5、返回当前对应的星期

+ (NSString*)stringForDateWeek

{

NSArray*weekdays = [NSArrayarrayWithObjects: [NSNullnull],

@"Sunday",

@"星期一",@"星期二",@"星期三",@"星期四",@"星期五",@"星期六",nil];

NSDate*nowDate = [NSDatedate];

NSCalendar*calendar = [NSCalendarcurrentCalendar];

NSDateComponents*comp = [calendarcomponents:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay|NSCalendarUnitWeekday|NSCalendarUnitDayfromDate:nowDate];

//获取今天是周几

NSIntegerweekDay = [compweekday];

return[weekdaysobjectAtIndex:weekDay];

}

今天暂时就写这么多，之后有时间接着更新。