iOS开发——锁屏监听
公司所做的项目,锁屏监听是为了60秒后,解锁瓶后显示【手势解锁】或【指纹验证】;
第一步:AppDelegate.m 头部导入
#import <notify.h>
#define NotificationLock CFSTR("com.apple.springboard.lockcomplete")
#define NotificationChange CFSTR("com.apple.springboard.lockstate")
#define NotificationPwdUI CFSTR("com.apple.springboard.hasBlankedScreen")
第二步:在- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 方法内加入
以下代码
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL, screenLockStateChanged, NotificationLock, NULL, CFNotificationSuspensionBehaviorDeliverImmediately);
CFNotificationCenterAddObserver(CFNotificationCenterGetDarwinNotifyCenter(), NULL, screenLockStateChanged, NotificationChange, NULL, CFNotificationSuspensionBehaviorDeliverImmediately);
第三步:在appDelege.m中加入新的方法(C语言的)
static void screenLockStateChanged(CFNotificationCenterRef center,void* observer,CFStringRef name,const void* object,CFDictionaryRef userInfo)
{
NSString* lockstate = (__bridge NSString*)name;
if ([lockstate isEqualToString:(__bridge NSString*)NotificationLock]) {
NSLog(@"locked.");
// 此处监听的系统锁屏
} else {
NSLog(@"lock state changed.");
// 此处监听到屏幕解锁事件(锁屏也会掉用此处一次,锁屏事件要在上面实现)
}
}
第四步:如何在C语言函数内调用OC方法 ( C语言函数内没法使用self )
本例为了实现在appDelegate.m中通过self 调用一个方法(弹出手势解锁的方法)
本质是通过指针来实现
1. 声明一个全局变量,并赋nil
AppDelegate *appDelegate = nil;
2. 在- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 方法内如下赋值:
appDelegate = self;
3.在刚才的锁屏监听的C语言函数内如下调用appDelegate OC方法,这样就不会因为self导致报错了
[appDelegate showGestureOrFinger];