1、代碼實現"密碼至少為9位，並需包含大寫字母、小寫字母、數字或特殊字符等三種"
返回0、1、2為格式不正確，返回4為密碼格式正確
-(int)checkIsHaveNumAndLetter:(NSString*)password
{
//數字條件
NSRegularExpression *tNumRegularExpression = [NSRegularExpression regularExpressionWithPattern:@"[0-9]" options:NSRegularExpressionCaseInsensitive error:nil];
//符合數字條件的有幾個字節
NSUInteger tNumMatchCount = [tNumRegularExpression numberOfMatchesInString:password
options:NSMatchingReportProgress
range:NSMakeRange(0, password.length)];
//英文字條件
NSRegularExpression *sLetterRegularExpression = [NSRegularExpression regularExpressionWithPattern:@"[a-z]" options:NSRegularExpressionDotMatchesLineSeparators error:nil];
//符合英文字條件的有幾個字節
NSUInteger sLetterMatchCount = [sLetterRegularExpression numberOfMatchesInString:password options:NSMatchingReportProgress range:NSMakeRange(0, password.length)];
//英文字條件
NSRegularExpression *tLetterRegularExpression = [NSRegularExpression regularExpressionWithPattern:@"[A-Z]" options:NSRegularExpressionDotMatchesLineSeparators error:nil];
//符合英文字條件的有幾個字節
NSUInteger tLetterMatchCount = [tLetterRegularExpression numberOfMatchesInString:password options:NSMatchingReportProgress range:NSMakeRange(0, password.length)];
if (password.length < 9) {
// 密碼長度不正確
return 0;
} else {
// 沒有大寫或小寫
if (tLetterMatchCount == 0 || sLetterMatchCount == 0) {
return 1;
} else {
if (tNumMatchCount > 0) {
return 4;
} else{
if(tNumMatchCount + tLetterMatchCount + sLetterMatchCount < password.length){
return 4;
} else{
return 2;
}
}
}
}
}
需注意：NSRegularExpressionOptions，如果不區分大小寫可以使用 NSRegularExpressionCaseInsensitive
NSRegularExpressionCaseInsensitive = 1 << 0, // 不區分大小寫的
NSRegularExpressionAllowCommentsAndWhitespace = 1 << 1, // 忽略空格和# - NSRegularExpressionIgnoreMetacharacters = 1 << 2, // 整體化 NSRegularExpressionDotMatchesLineSeparators = 1 << 3, // 匹配任何字符，包括行分隔符 NSRegularExpressionAnchorsMatchLines = 1 << 4, // 允許^和$在匹配的開始和結束行 NSRegularExpressionUseUnixLineSeparators = 1 << 5, // (查找范圍為整個的話無效) NSRegularExpressionUseUnicodeWordBoundaries = 1 << 6 // (查找范圍為整個的話無效)