anspencer的博客

因为在开发过程中所有的耗时操作必须在主线程中执行，所以线程之间的通信很重要，以下是示例代码#import "ViewController.h"@interface ViewController ()@property (strong, nonatomic) IBOutlet UIImageView *imageView;@end@implementation ViewContro

1. ios延迟执行的几种方法[selfperformSelector:@selector(方法)withObject:nilafterDelay:2.0];[NSTimerscheduledTimerWithTimeInterval:2.0target:selfselector:@selector(方法)userInfo:nilrepeats:NO

1。 arc环境下：提供全局变量static Tool *instance+(instance)allocWithZone:(struct _NSZone *)zone{if(instance==nil){instance=[super allocWithZone:zone];}return instance;}加互斥锁的方法