1: NSString <==> NSInteger
NSNumber *indexNum = [NSNumber numberWithInt:index];
NSString *teststring = @"32.54";
int i = [teststring intValue];
float i1 = [teststring floatValue];
double i2 = [teststring doubleValue];
NSInteger i3 = [teststring integerValue];
NSString *tostring = nil;
tostring = [NSString stringWithFormat:@"%d",i];
NSLog(@"tostring-int:%@",tostring);
tostring = [NSString stringWithFormat:@"%.3f",i1];
NSLog(@"tostring-float:%@",tostring);
tostring = [NSString stringWithFormat:@"%e",i2];
NSLog(@"tostring-double:%@",tostring);
NSNumber转NSString:
假设现有一NSNumber的变量A,要转换成NSString类型的B
方法如下:
NSNumberFormatter* numberFormatter = [[NSNumberFormatteralloc] init];
B = [numberFormatter stringFromNumber:A];
[numberFormatter release];
nsstring和float 还有int之间的转换
NSString *tempA = @"123";
NSString *tempB = @"456";
1,字符串拼接
NSString *newString = [NSString stringWithFormat:@"%@%@",tempA,tempB];
2,字符转int
int intString = [newString intValue];
3,int转字符
NSString *stringInt = [NSString stringWithFormat:@"%d",intString];
4,字符转float
float floatString = [newStringfloatValue];
5,float转字符
NSString *stringFloat = [NSString stringWithFormat:@"%f",intString];
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