1. stringWithFormat 用法:
[NSString stringWithFormat:@"Hight: %d°%@ Low: %d°%@", [Temp],@"C",[lTemp],@"C"];
NSString to NSData:
NSString* str= @"kilonet";
NSData* data=[str dataUsingEncoding:NSUTF8StringEncoding];
2. NSDate 用法:
NSDate *today;
NSDate *tomorrow;
today = [NSDate date];
tomorrow = [NSDate dateWithTimeInterval:(i*24*60*60) sinceDate:today]; //可能有更好的
Date format用法:
-(NSString *) getDay:(NSDate *) d {
NSString *s ;
NSDateFormatter *format = [[NSDateFormatter alloc] init];
[format setDateFormat:@"YYYY/MM/dd hh:mm:ss"];
s = [format stringFromDate:d];