#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UILabel *remindLabel;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)sendBtnClick:(UIButton *)sender {
/*--第一种采用GCD发送请求并刷新UI--*/
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
sleep(2);
dispatch_async(dispatch_get_main_queue(), ^{
_remindLabel.text=@"发送成功";
});
});
/*--第二种采用NSBlockOperation、NSOperationQueue队列发送请求并刷新UI--*/
NSOperationQueue *myQueue=[[NSOperationQueue alloc]init];
NSBlockOperation *operation=[NSBlockOperation blockOperationWithBlock:^{
//延时2秒
sleep(2);
//主线程刷新UI
dispatch_async(dispatch_get_main_queue(), ^{
_remindLabel.text=@"发送成功";
});
}];
[myQueue addOperation:operation];
/*--第三种采用NSThread发送请求并刷新UI--*/
[NSThread detachNewThreadSelector:@selector(sendState) toTarget:self withObject:nil];
}
-(void)sendState
{
sleep(2);
dispatch_async(dispatch_get_main_queue(), ^{
[self updateLabel];
});
}
-(void)updateLabel
{
_remindLabel.text=@"发送成功";
}
@end
