分类！ 分类！分类！ 如下：
+(BOOL)max:(NSString *)maxStr bStr:(NSString *)bStr{
NSNumberFormatter *numFormat = [[NSNumberFormatter alloc] init];
[numFormat setNumberStyle:NSNumberFormatterDecimalStyle];
NSNumber *a = [numFormat numberFromString:maxStr];
NSNumber *b = [numFormat numberFromString:bStr];
if ([a compare:b] == NSOrderedDescending) {//a大
return YES;
}else{
return NO;
}
}
+(BOOL)min:(NSString *)minStr bStr:(NSString *)bStr{
NSNumberFormatter *numFormat = [[NSNumberFormatter alloc] init];
[numFormat setNumberStyle:NSNumberFormatterDecimalStyle];
NSNumber *a = [numFormat numberFromString:minStr];
NSNumber *b = [numFormat numberFromString:bStr];
if ([a compare:b] == NSOrderedAscending) {//a小
return YES;
}else{
return NO;
}
}
+(BOOL)deng:(NSString *)aStr bStr:(NSString *)bStr{
NSNumberFormatter *numFormat = [[NSNumberFormatter alloc] init];
[numFormat setNumberStyle:NSNumberFormatterDecimalStyle];
NSNumber *a = [numFormat numberFromString:aStr];
NSNumber *b = [numFormat numberFromString:bStr];
if ([a compare:b] == NSOrderedSame) {//相等
return YES;
}else{
return NO;
}
}
