OC各种数据类型之间的转换⽅法NSNumber转NSString:
假设现有⼀NSNumber的变量A，要转换成NSString类型的B
⽅法如下：
NSNumberFormatter* numberFormatter = [[NSNumberFormatteralloc] init];
B = [numberFormatter stringFromNumber:A];
[numberFormatter release];
nsstring和float 还有int之间的转换
NSString *tempA = @"123";
NSString *tempB = @"456";
1，字符串拼接
NSString *newString = [NSString stringWithFormat:@"%@%@",tempA,tempB];
2，字符转int
int intString = [newString intValue];
3，int转字符
NSString *stringInt = [NSString stringWithFormat:@"%d",intString];
4，字符转float
float floatString = [newString floatValue];
5，float转字符
NSString *stringFloat = [NSString stringWithFormat:@"%f",intString];
///
[plain]
1. NSString *a = [[NSString alloc] initWithString : @"5, 10, 2, 0, 0, 0.01, 1, 0.05, 0, 0, 0"];
2. NSArray *bullteData = [a componentsSeparatedByString:@","];
c++string类型
3. [a release];
4. for (int i = 0; i < [bullteData count]; i++) {
5. NSLog(@"%f",[[NSString stringWithFormat:@"%@",[bullteData objectAtIndex:i]] floatValue]);
6. }
NSString *a = [[NSString alloc] initWithString : @"5, 10, 2, 0, 0, 0.01, 1, 0.05, 0, 0, 0"];
NSArray *bullteData = [a componentsSeparatedByString:@","];
[a release];
for (int i = 0; i < [bullteData count]; i++) {
NSLog(@"%f",[[NSString stringWithFormat:@"%@",[bullteData objectAtIndex:i]] floatValue]);
}
将字符串存到数组中，在读取的时候转换成需要的类型。

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