iOS 开发 关于字符串 常用的公共方法

//  判断字符串中是否含有空格
+ (BOOL)isHaveSpaceInString:(NSString *)string{
NSRange _rang = [string rangeOfString:@" "];
if (_rang.location != NSNotFound) {
return YES;
}else
{
return NO;
}
}

//  判断字符串中是否含有中文
+ (BOOL)isHaveChineseInString:(NSString *)string{
for (NSInteger i = 0; i < string.length; i++) {
int a = [string characterAtIndex:i];
if (a > 0x4e00 && a < 0x9fff) {
return YES;
}
}
return NO;
}

//  判断字符串中是否含有某个字符串
+ (BOOL)isHaveString:(NSString *)string1 InString:(NSString *)string2{
NSRange _rang = [string2 rangeOfString:string1];
if (_rang.location != NSNotFound) {
return YES;
}else{
return NO;
}
}

//  判断字符串是否全部为数字
+ (BOOL)isAllNum:(NSString *)string{
unichar c;
for (int i = 0; i < string.length; i++) {
c = [string characterAtIndex:i];
if (!isdigit(c)) {
return NO;
}
}
return YES;
}