主要调用AudioServicesPlaySystemSoundWithVibration这个PRivate api，传入一个含有时间和强度的dictionary即可。
注意要引入AudioToolbox.framework。在iOS6，iOS7上测试通过。

private api有风险，注意不要在上架app中使用。

 1 NSMutableDictionary* dict = [NSMutableDictionary dictionary];
 2 NSMutableArray* arr = [NSMutableArray array ];
 3 
 4 [arr addObject:[NSNumber numberWithBool:YES]]; //vibrate for 2000ms
 5 [arr addObject:[NSNumber numberWithInt:2000]];
 6 
 7 
 8 [dict setObject:arr forKey:@"VibePattern"];
 9 [dict setObject:[NSNumber numberWithFloat:0.3] forKey:@"Intensity"];
10 
11 AudioServicesPlaySystemSoundWithVibration(4095,nil,_buff);

写了一个封装demo
.h

 1 //
 2 // YANGZShaking.h
 3 // shaking
 4 //
 5 // Created by mmm on 14-1-11.
 6 // Copyright (c) 2014年 yangz. All rights reserved.
 7 //
 8 
 9 #import <Foundation/Foundation.h>
10 
11 @interface YANGZVibePattern : NSObject
12 + (YANGZVibePattern *)PatternWithIntensity:(float)intensity time:(NSUInteger)time isVibe:(BOOL)isVibe;
13 @property (nonatomic) bool isV;
14 @property (nonatomic) float intensity;
15 @property (nonatomic) NSUInteger time;
16 
17 @end
18 
19 @interface YANGZShaking : NSObject
20 
21 
22 - (YANGZShaking *)initWithPattern:(NSArray *)patterns;
23 - (YANGZShaking *)initWithFile:(NSString *)file;
24 - (YANGZShaking *)initWithLoop:(NSUInteger)vibe pause:(NSUInteger)pause;
25 - (void)play;
26 - (void)stop;
27 
28 @end

.m

  1 //
  2 //  YANGZShaking.m
  3 //  shaking
  4 //
  5 //  Created by mmm on 14-1-11.
  6 //  Copyright (c) 2014年 yangz. All rights reserved.
  7 //
  8 
  9 
 10 #import "YANGZShaking.h"
 11 #import <AudioToolbox/AudioToolbox.h>
 12 
 13 
 14 @implementation YANGZVibePattern
 15 + (YANGZVibePattern *)PatternWithIntensity:(float)intensity time:(NSUInteger)time isVibe:(BOOL)isVibe{
 16     YANGZVibePattern *pattern = [YANGZVibePattern new];
 17     pattern.isV = isVibe;
 18     pattern.intensity = intensity;
 19     pattern.time = time;
 20     return pattern;
 21 };
 22 @end
 23 
 24 
 25 @interface YANGZShaking(){
 26     NSArray *_patterns;
 27     NSMutableDictionary *_buff;
 28     bool _isRepeat;
 29 }
 30 @end
 31 
 32 
 33 @implementation YANGZShaking
 34 
 35 
 36 - (YANGZShaking *)initWithPattern:(NSArray *)patterns{
 37     if ([super init]) {
 38         _patterns = [[NSMutableArray alloc] initWithArray:patterns copyItems:YES];
 39         _buff=nil;
 40         _isRepeat=NO;
 41     }
 42 return self;
 43 }
 44 
 45 
 46 - (YANGZShaking *)initWithFile:(NSString *)file{
 47     if ([super init]) {
 48         _patterns = [NSMutableArray arrayWithContentsOfFile:file];
 49         _buff=nil;
 50         _isRepeat=NO;
 51     }
 52 return self;
 53 }
 54 - (YANGZShaking *)initWithLoop:(NSUInteger)vibe pause:(NSUInteger)pause{
 55     if ([super init]) {
 56         YANGZVibePattern *vibePattern = [YANGZVibePattern PatternWithIntensity:0.3 time:vibe isVibe:YES];
 57         YANGZVibePattern *pausePattern = [YANGZVibePattern PatternWithIntensity:0.9 time:pause isVibe:NO];
 58 
 59         _patterns = @[vibePattern,pausePattern];
 60         _buff=nil;
 61         _isRepeat=YES;
 62     }
 63 return self;
 64 
 65 
 66 }
 67 - (void)play{
 68     [NSThread detachNewThreadSelector:@selector(loop) toTarget:self withObject:nil];
 69 }
 70 - (void)stop{
 71 
 72 }
 73 
 74 
 75 - (void)loop{
 76     NSUInteger i=0;
 77     while (YES) {
 78         NSUInteger pause = 0;
 79         YANGZVibePattern *pattern = _patterns;
 80         if (!pattern.isV) {
 81         }
 82         else{
 83             [self prepareBuffWithPattern:pattern];
 84             [self performSelectorOnMainThread:@selector(systemPlay) withObject:nil waitUntilDone:NO];
 85         }
 86         [NSThread sleepForTimeInterval:pattern.time*1.0f/1000];
 87         i++;
 88         if (i==[_patterns count] && !_isRepeat) {
 89             break;
 90         }
 91         i=i%[_patterns count];
 92     }
 93 }
 94 - (void)prepareBuffWithPattern:(YANGZVibePattern *)pattern{
 95     NSMutableDictionary* dict = [NSMutableDictionary dictionary];
 96     NSMutableArray* arr = [NSMutableArray array ];
 97 
 98     [arr addObject:[NSNumber numberWithBool:YES]]; //vibrate for 2000ms
 99     [arr addObject:[NSNumber numberWithInt:pattern.time]];
100 
101 
102 
103     [dict setObject:arr forKey:@"VibePattern"];
104     [dict setObject:[NSNumber numberWithFloat:pattern.intensity] forKey:@"Intensity"];
105     _buff = dict;
106 }
107 - (void)systemPlay{
108     NSLog(@"system play @%");
109 
110     AudioServicesPlaySystemSoundWithVibration(4095,nil,_buff);
111 }
112 @end