把中间的字符串替换成等长度的*

一、比如12345678900----------->想显示成123*****900

1、使用
NSString *name=@"12345678900";
NSString *phoneStr= [self replaceStringWithAsterisk:name startLocation:3 lenght:name.length -6];
2、字符串、开始位置、结束位置
-(NSString *)replaceStringWithAsterisk:(NSString *)originalStr startLocation:(NSInteger)startLocation lenght:(NSInteger)lenght

{

NSString *newStr = originalStr;

for (int i = 0; i < lenght; i++) {
    
    NSRange range = NSMakeRange(startLocation, 1);
    
    newStr = [newStr stringByReplacingCharactersInRange:range withString:@"*"];
    
    startLocation ++;
    
}

return newStr;

}