将 Objective-C 转换为 Swift 日期标签

Question

我正在开发一个应用程序，并尝试根据星期几实现不同的文本标签消息。前任。如果

星期一："Today's Hours are: 8:00am - 6:00pm"
周二："Today's Hours are: 8:00am - 6:00pm"
星期三："Today's Hours are: 8:00am - 6:00pm"
星期四："Today's Hours are: 8:00am - 6:00pm"
星期五："Today's Hours are: 8:00am - 6:00pm"
星期六："Today's Hours are: 9:00am - 2:00pm"
周日："Sorry we are closed today"

我的 Objective-C 有效代码是：

NSDate* currentDate = [NSDate date];
NSTimeZone* currentTimeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];
NSTimeZone* nowTimeZone = [NSTimeZone systemTimeZone];

NSInteger currentGMTOffset = [currentTimeZone secondsFromGMTForDate:currentDate];
NSInteger nowGMTOffset = [nowTimeZone secondsFromGMTForDate:currentDate];

NSTimeInterval interval = nowGMTOffset - currentGMTOffset;
NSDate* nowDate = [[NSDate alloc] initWithTimeInterval:interval sinceDate:currentDate];

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"EEEE"];
NSString *dayName = [dateFormatter stringFromDate:nowDate];

NSString *timing = @"8:00am - 6:00pm";
NSString *description =@"Today's Hours are";
NSArray *days = @[@"Monday",@"Tuesday",@"Wednesday",@"Thursday",@"Friday",@"Saturday",@"Sunday",];

for (NSString *str in days) {
    if ([str isEqualToString:@"Saturday"]) {
        timing = @"9:00am - 2:00pm";
    }
    if ([str isEqualToString:@"Sunday"]) {
        description = @"Sorry we are closed today";
        timing = nil;
    }
    if ([str isEqualToString:dayName]) {
        NSLog(@"%@ : %@ :%@",str,description,timing);
        //here you can write yourLabelname.text =[NSString stringWithFormat:@"%@ : %@ :%@",str,description,timing];
    }
}

我能否获得有关将其转换为 Swift 的帮助？

Answer 1

如果你想在 Swift 中编写原本在 objective-c 中编写的代码，这很容易。大多数时候，方法名称与 objective-c 中的名称相同。 In this Developer Library you can get many informations about that.

但为了让您了解一下这些方法有多么相似：

var currentDate:NSDate = NSDate()
var currentTimeZone = NSTimeZone(abbreviation: "GMT")

var nowTimeZone = NSTimeZone.systemTimeZone()

var currentGMTOffset = currentTimeZone?.secondsFromGMTForDate(currentDate)
var nowGMTOffset = nowTimeZone.secondsFromGMTForDate(currentDate)

var interval:NSTimeInterval = Double(nowGMTOffset) - Double(currentGMTOffset!)

var nowDate = NSDate(timeInterval: interval, sinceDate: currentDate)

var dateFormatter = NSDateFormatter()

dateFormatter.dateFormat = "EEEE"

var dayName = dateFormatter.stringFromDate(nowDate)

var timing = "8:00am - 6:00pm"
var description = "Today's Hours are"
var days = ["Monday","Tuesday","Wednesday","Thursday","Friday","Saturday", "Sunday"]

for str in days{
    if(str == "Saturday"){
        timing = "9:00am - 2:00pm"
    }

    if(str == "Sunday"){
        description = "Sorry we are closed today"
    }

    if(str == dayName){
        println("\(str) : \(description) : \(timing)")
    }
}

将 Objective-C 转换为 Swift 日期标签

Convert Objective-C to Swift Date Label

objective-c

nsdate

ios

swift

xcode6