如何将NSString值@"3.45"转换为float？

Question

如何将NSString值@"3.45"转换为float.3.45

float fCost = [[NSDecimalNumber decimalNumberWithString:@"3.45"]floatValue] ;

Answer 1

NSString *val = @"3.45";
float fCost = [val floatValue];

Answer 2

float number = [string floatValue];

Answer 3

NSString 的：- (float)floatValue;

例如：

NSString *str = @"3.45";
float f = [str floatValue];