数据互转

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];

///////

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]);
}

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。