在Objective-C中将float转换为int

Question

如何将a转换float为int舍入到下一个整数？例如,1.00001将转到2,而1.9999将转到2.

Answer 1

float myFloat = 3.333

// for nearest integer rounded up (3.333 -> 4):
int result = (int)ceilf(myFloat );

// for nearest integer (3.4999 -> 3, 3.5 -> 4):
int result = (int)roundf(myFloat );

// for nearest integer rounded down (3.999 -> 3):
int result = (int)floor(myFloat);

// For just an integer value (for which you don't care about accuracy) 
int result = (int)myFloat;

Answer 2

使用ceil函数:

int intValue = (int)ceil(yourValue);