開發(fā)中常用到的一些小技巧，雖簡單卻很實(shí)用！

1.將秒數(shù)轉(zhuǎn)化為00:00格式

  //處理時間顯示
  +(NSString *)convertToTimeString:(int)time{
    NSString*timeStr=[NSString stringWithFormat:@"%d%d:%d%d",time/60/10,time/60%10,time%60/10,time%60%10];
    return timeStr;
  }

2.用0補(bǔ)全位數(shù)的方法

  NSInteger count = 5;
  //02代表:如果count不足2位 用0在最前面補(bǔ)全(2代表總輸出的個數(shù))
  NSString *string = [NSString stringWithFormat:@"zd",count];
  //輸出結(jié)果是: 05
  NSLog(@"%@", string);

3.字典轉(zhuǎn)化為json字符串
+ (NSString *)JSONStrFromDictionary:(NSDictionary *)dict{
NSError *parseError = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&parseError];
return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
}

4.將數(shù)組通過某個字符與字符串的轉(zhuǎn)換

  self.typeString = [mTypeArray componentsJoinedByString:@"|"];