NSString*string =@"sdfsfsfsAdfsdf";
string = [string substringToIndex:7];//截取掉下标7之后的字符串
NSLog(@"截取的值为:%@",string);
[string substringFromIndex:2];//截取掉下标2之前的字符串
NSLog(@"截取的值为:%@",string);
NSString*string =@"sdfsfsfsAdfsdf";
NSRange range = [string rangeOfString:@"f"];//匹配得到的下标
NSLog(@"rang:%@",NSStringFromRange(range));
string = [string substringWithRange:range];//截取范围类的字符串
NSLog(@"截取的值为:%@",string);
NSString*string =@"sdfsfsfsAdfsdf";
//从字符A中分隔成2个元素的数组
NSArray *array = [string componentsSeparatedByString:@"A"];
//结果是adfsfsfs和dfsdf
NSLog(@"array:%@",array);
NSRange range = [model.serviceName rangeOfString:@"★"];
//字符串中没有★,名字不可能相同
if (range.location==NSNotFound) return;
/**截取*/
NSString*codeString=[model.serviceName substringToIndex:range.location];
- (void)string:(NSString *)string containsStr:(NSString *)str{
BOOL isContain=([string rangeOfString:str].location !=NSNotFound)?YES:NO;
return isContain;
}
NSString* index=@"/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip";
//对路径截取的9种操作
NSLog(@"1=%@",[index lastPathComponent]);
NSLog(@"2=%@",[index stringByDeletingLastPathComponent]);
NSLog(@"3=%@",[index pathExtension]);
NSLog(@"4=%@",[index stringByDeletingPathExtension]);
NSLog(@"5=%@",[index stringByAbbreviatingWithTildeInPath]);
NSLog(@"6=%@",[index stringByExpandingTildeInPath]);
NSLog(@"7=%@",[index stringByStandardizingPath]);
NSLog(@"8=%@",[index stringByResolvingSymlinksInPath]);
NSLog(@"9=%@",[[index lastPathComponent] stringByDeletingPathExtension]);
//对应结果
1=2013_50.zip
2=/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books
3=zip
4=/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50
5=~/Documents/DownLoad/books/2013_50.zip
6=/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip
7=/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip
8=/Users/junzoo/Library/Application Support/iPhone Simulator/7.0.3/Applications/63925F20-AF97-4610-AF1C-B6B4157D1D92/Documents/DownLoad/books/2013_50.zip
9=2013_50
1. NSString转化为UNICODE String:
(NSString*)fname = @“Test”;
char fnameStr[10];
memcpy(fnameStr, [fname cStringUsingEncoding:NSUnicodeStringEncoding], 2*([fname length]));
//与strcpy相比,memcpy并不是遇到'\0'就结束,而是一定会拷贝完n个字节
2. NSString 转化为 char *
NSString * str= @“Test”;
const char * a =[str UTF8String];
3.char * 转化为 NSString
NSString *str=[NSString stringWithCString encoding:NSUTF8StringEncoding];
4. char * 转化 NSData
//方法一:
char * a = (char*)malloc(sizeof(byte)*16);
NSData *data = [NSData dataWithBytes: a length:strlen(a)];
//方法二:
转换为NSString: - (id)initWithUTF8String:(const char *)bytes
然后用NSString的 - (NSData *)dataUsingEncoding:(NSStringEncoding)encoding
5. NSData 转化 char *
NSData data ;
char* a=[data bytes];
6. NSData 转化 NSString;
NSData* data;
NSString* aStr= [NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
7. NSString 转化 NSData对象
NSData* xmlData = [@"testdata" dataUsingEncoding:NSUTF8StringEncoding];
8.NSString 转化 NSURL
NSString *urlString=[@"http://www.google.com/search?client=safari&rls=en&q=搜索&ie=UTF-8&oe=UTF-8" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
9.NSURL 转化 NSString
NSURL *url=[NSURL URLWithString:urlString];
NSString *s=[[url absoluteString] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:urlStr];
NSData *data = [NSData dataWithContentsOfURL:url];
NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
NSString *retStr = [[NSString alloc] initWithData:data encoding:enc];