iOS 截取字符串中两个指定字符串中间的字符串方法

// 要截取 "> 和 </ 之间的汉字内容:
@implementation ViewController
- (void)viewDidLoad {
 [super viewDidLoad];
 NSString *string = @"<a href=\"http\">这是要截取的内容</a>";
 NSRange startRange = [string rangeOfString:@"\">"];
 NSRange endRange = [string rangeOfString:@"</"];
 NSRange range = NSMakeRange(startRange.location + startRange.length, endRange.location - startRange.location - startRange.length);
 NSString *result = [string substringWithRange:range];
 NSLog(@"%@",result);
}
@end

// NSString 分类中实现如下方法:
#import "NSString+Extension_NSString.h"
@implementation NSString (Extension_NSString)
// 截取字符串方法封装
// 截取字符串方法封装
- (NSString *)subStringFrom:(NSString *)startString to:(NSString *)endString{
 NSRange startRange = [self rangeOfString:startString];
 NSRange endRange = [self rangeOfString:endString];
 NSRange range = NSMakeRange(startRange.location + startRange.length, endRange.location - startRange.location - startRange.length);
 return [self substringWithRange:range];
}
@end
// 控制器中直接用字符串调用:
#import "ViewController.h"
#import "NSString+Extension_NSString.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
 [super viewDidLoad];
 NSString *string = @"<a href=\"http\">这是要截取的内容</a>";
 NSString *result = [string subStringFrom:@"\">" to:@"</"];
 NSLog(@"%@",result);
}
// 这样使用起来更方便,简洁