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];

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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。


convert an NSString into an NSNumber

NSString *intString =@"34534";

[NSNumber numberWithInt:[intString intValue]];