不定期更新:有部分摘自其他博客,不一一列出出處,在此感謝作者
- 使用MD5對(duì)NSData或者NSString加密
//需要引入此頭文件來使用CC_MD5
#import <CommonCrypto/CommonDigest.h>
針對(duì)NSString的加密①
- (NSString *) md5:(NSString *) input{
const char *cStr = [input UTF8String];
unsigned char digest[CC_MD5_DIGEST_LENGTH];
CC_MD5( cStr, strlen(cStr), digest );
NSMutableString *output = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) [output appendFormat:@"%02x", digest[i]];
return output;
}
針對(duì)NSString的加密②
- (NSString *)md5:(NSString *) input{
const char *cStr = [input UTF8String];
unsigned char result[CC_MD5_DIGEST_LENGTH];
CC_MD5( cStr, (int)strlen(cStr), result );
return [NSString stringWithFormat: @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15]
];
}
針對(duì)NSData的加密
- (NSString*)md5:(NSData *)data
{
unsigned char result[CC_MD5_DIGEST_LENGTH];
CC_MD5( data.bytes, (int)data.length, result );
return [NSString stringWithFormat:
@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15]
];
}
- 獲取顯示在屏幕上的所有cell
self.tableView.visibleCells
- 判斷NSString中是否包含中文
-(BOOL)isChinese:(NSString *)str{
NSString *match=@"(^[\u4e00-\u9fa5]+$)";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF matches %@", match];
return [predicate evaluateWithObject:str];
}
- 去掉TableView未占滿屏幕的空白行
self.tableView.tableFooterView = [UIView new];
//方法1:重寫下面方法
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
if (action == @selector(paste:))//禁止粘貼
return NO;
if (action == @selector(select:))// 禁止選擇
return NO;
if (action == @selector(selectAll:))// 禁止全選
return NO;
return [super canPerformAction:action withSender:sender];
}
//方法2:
-(BOOL)canPerformAction:(SEL)action withSender:(id)sender {
UIMenuController *menuController = [UIMenuController sharedMenuController];
if (menuController) {
[UIMenuController sharedMenuController].menuVisible = NO;
}
return NO;
}
- Xcode7下將https請求改回http請求
//將下面代碼加入info.plist文件
//info.plist->open as->source code
<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>
- iOS9下將NSString轉(zhuǎn)為UTF8
url = [url stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
