ios NSString format 保留小数点 float double

%C16-bit Unicode character (unichar), printed by NSLog() as an ASCII character, or, if not an ASCII character, in the octal format \\ddd or the Unicode hexadecimal format \\udddd, where d is a digit

，生活不是等待风暴过去，而是学会在雨中翩翩起舞。