如何將NSString的值@「3.45」轉換爲浮點數？

Question

如何將NSString的值「3.45」轉換爲浮點數。 3.45

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

Answer 1

的NSString的：- (float)floatValue;

例如：

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

Answer 2

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

Answer 3

閱讀您的評論馬立克氏回答它看起來像你的字符串實際上= @"$3.45"

將其轉換成浮動使用：

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

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

Answer 4

float number = [string floatValue];