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：- (float)floatValue;

例如：

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

Answer 4

阅读您对Marek的回答的评论看起来您的字符串实际上是= @"$3.45"

要将其转换为浮动使用：

NSNumberFormatter * formatter = [[[NSNumberFormatter alloc] init] autorelease];
formatter.numberStyle = NSNumberFormatterCurrencyStyle;
formatter.currencyCode = @"USD";

float value = [[formatter numberFromString: @"$3.45"] floatValue];