定時(shí)器用到項(xiàng)目上會有互相引用問題:直接上代碼
#import@interface Person : NSObject
-(void)startTimer;
-(void)endTimer;
@end
#import "Person.h"
#import "NSTimer+HYBExtension.h"
@interface Person()
@property(nonatomic,retain)NSTimer *timer;
@end
@implementation Person
-(instancetype)init
{
self =[super init];
if (self) {
}
return self;
}
-(void)startTimer
{
__block Person * selfWeak = self;
//在這里先轉(zhuǎn)成弱引用聂抢，防止定時(shí)器對person的強(qiáng)引用
NSTimer * timerC = [NSTimer scheduledTimerWithTimeInterval:2.0f repeats:YES callback:^{
// 換成強(qiáng)引用是為了調(diào)用方法時(shí)在并發(fā)時(shí)會使self變?yōu)閚il
Person * StrongSelf = selfWeak;
[StrongSelf sayhello];
}];
self.timer = timerC;
//NSLog(@"ZKZTimer的引用計(jì)數(shù):%ld",[_timer retainCount]);
}
-(void)saystr:(NSString *)ss
{
}
-(void)sayhello
{
NSLog(@"block");
//NSLog(@"---------------------------");
}
-(void)endTimer
{
[self.timer invalid];
}
-(void)dealloc
{
//? ? NSLog(@"person dealloc");
//? ? NSLog(@"%ld",[_Timer retainCount]);
//? ? [_Timer removeTimer];
NSLog(@"%ld",[_timer retainCount]);
if (_timer) {
[_timer release];
_timer = nil;
}
[super dealloc];
}
創(chuàng)建定時(shí)器分類（分類是在網(wǎng)上下載下來的）
@interface NSTimer (HYBExtension)
/**
*? 無參數(shù)無返回值Block
*/
typedef void (^HYBVoidBlock)(void);
/**
*? 創(chuàng)建Timer---Block版本
*
*? @param interval 每隔interval秒就回調(diào)一次callback
*? @param repeats? 是否重復(fù)
*? @param callback 回調(diào)block
*
*? @return NSTimer對象
*/
+ (NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)interval
repeats:(BOOL)repeats
callback:(HYBVoidBlock)callback;
/**
*? 創(chuàng)建Timer---Block版本
*
*? @param interval 每隔interval秒就回調(diào)一次callback
*? @param count? 回調(diào)多少次后自動暫停督赤，如果count <= 0，則表示無限次屎债，否則表示具體的次數(shù)
*? @param callback 回調(diào)block
*
*? @return NSTimer對象
*/
//+ (NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)interval
//? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? count:(NSInteger)count
//? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? callback:(HYBVoidBlock)callback;
/**
*? 開始啟動定時(shí)器
*/
- (void)fireTimer;
/**
*? Make it invalid if currently it is valid.
*/
- (void)invalid;
//
//? NSTimer+HYBExtension.m
//? HYBTimerExtension
//
//? Created by huangyibiao on 15/4/16.
//? Copyright (c) 2015年 huangyibiao. All rights reserved.
//
#import "NSTimer+HYBExtension.h"
@implementation NSTimer (HYBExtension)
+ (NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)interval
repeats:(BOOL)repeats
callback:(HYBVoidBlock)callback {
return [NSTimer scheduledTimerWithTimeInterval:interval
target:self
selector:@selector(onTimerUpdateBlock:)
userInfo:[callback copy]
repeats:repeats];
}
//+ (NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)interval
//? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? count:(NSInteger)count
//? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? callback:(HYBVoidBlock)callback {
//? if (count <= 0) {
//? ? return [self scheduledTimerWithTimeInterval:interval repeats:YES callback:callback];
//? }
//
//? NSDictionary *userInfo = @{@"callback"? ? : [callback copy],
//? ? ? ? ? ? ? ? ? ? ? ? ? ? @"count"? ? ? ? : @(count)};
//? return [NSTimer scheduledTimerWithTimeInterval:interval
//? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? target:self
//? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? selector:@selector(onTimerUpdateCountBlock:)
//? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? userInfo:userInfo
//? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? repeats:YES];
//}
+ (void)onTimerUpdateBlock:(NSTimer *)timer {
HYBVoidBlock block = timer.userInfo;
NSLog(@"分類引用計(jì)數(shù):%ld",[timer retainCount]);
if (block) {
block();
}
}
+ (void)onTimerUpdateCountBlock:(NSTimer *)timer {
static NSUInteger currentCount = 0;
NSDictionary *userInfo = timer.userInfo;
HYBVoidBlock callback = userInfo[@"callback"];
NSNumber *count = userInfo[@"count"];
if (currentCount < count.integerValue) {
currentCount++;
if (callback) {
callback();
}
} else {
currentCount = 0;
[timer unfireTimer];
}
}
- (void)fireTimer {
[self setFireDate:[NSDate distantPast]];
}
- (void)unfireTimer {
[self setFireDate:[NSDate distantFuture]];
}
- (void)invalid {
if (self.isValid) {
[self invalidate];
}
}
@end
