1.NSDictionary轉(zhuǎn)NSData【相互轉(zhuǎn)換】
NSDictionary *dic= @{@"name":@"macRong",@"webHome":@"eqi.cc"};
NSData *data= [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:nil];
NSDictionary *dictionary =[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
NSLog(@"NSDictionary轉(zhuǎn)NSData= %@",data);
NSLog(@"NSData轉(zhuǎn)NSDictionary=%@",dictionary);
2.NSDictionary轉(zhuǎn)NSString(需要先將NSDictionary轉(zhuǎn)為NSData,再轉(zhuǎn)為NSString)
NSDictionary *dictionary2 = [NSDictionary dictionaryWithObjectsAndKeys:_userNameTexField.text,@"AAccount", _pwdTextField.text,@"APassword",@"1",@"DeviceType",nil];
NSData *data = [NSJSONSerialization dataWithJSONObject:dictionary2 options:NSJSONWritingPrettyPrinted error:nil];
NSString *strhh = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
3.NSData和NSString相互轉(zhuǎn)換
// 字符串轉(zhuǎn)Data
NSString *str =@"jesfds";
NSData *data =[str dataUsingEncoding:NSUTF8StringEncoding];
//NSData 轉(zhuǎn)NSString
NSString *result =[[ NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
4.判斷字符串中含有某個(gè)字符串
//判斷userNameLab.text 是否含有bendan
if([userNameLab.text rangeOfString:@"bendan"].location !=NSNotFound)//userNameLab
{
NSLog(@"yes");
}
else
{
NSLog(@"no");
}
5.UIImage和NSData
//NSData轉(zhuǎn)換為UIImage
NSData *imageData = [NSData dataWithContentsOfFile: imagePath];
UIImage *image = [UIImage imageWithData: imageData];
//UIImage轉(zhuǎn)換為NSData
NSData *imageData = UIImagePNGRepresentation(aimae); ```
6.Int 和NSNumber
//int 轉(zhuǎn)NSNumber
int myInt善绎；
NSNumber *myNumber = [NSNumber numberWithInt:myInt];
//NSNumber 轉(zhuǎn)int
int myInt = [myNumber intValue];；
7.int轉(zhuǎn)string
int number = 100;
NSString *string = [[NSString alloc] initWithFormat:@"%d",number];
