//
// UITestViewController.m
// UITest
//
#import "UITestViewController.h"
@implementation UITestViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self.view setBackgroundColor:[UIColor blackColor]];
UIActivityIndicatorView *myActivityView = [[UIActivityIndicatorView alloc]
initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
CGRect activityFrame = CGRectMake(130,100,50,50);
[myActivityView setFrame:activityFrame];
[myActivityView startAnimating];
[self.view addSubview:myActivityView];
[myActivityView release];
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
}
@end
在UIActivityIndicatorView与UITableView混用时,如果直接在点击表格的时间中来调用UIActivityIndicatorView,可能该视图的出现仍然会延迟,解决方法是重新开启一个线程来执行该方法,实例如下:
- (void)viewDidLoad { myview = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 768, 1004)]; [myview setBackgroundColor:[UIColor blackColor]]; [myview setAlpha:0.5]; myActivityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; [myActivityView setFrame:CGRectMake(0, 0, 50, 50)]; myActivityView.center = self.view.center; myActivityView.hidesWhenStopped = YES; UILabel *mylabel = [[UILabel alloc] initWithFrame:CGRectMake(myActivityView.frame.origin.x-50,myActivityView.frame.origin.y + 50, 200, 50)]; mylabel.text = @"数据加载中⋯"; mylabel.backgroundColor = [UIColor clearColor]; mylabel.font = [UIFont systemFontOfSize:22]; mylabel.textColor = [UIColor whiteColor]; [myview addSubview:mylabel]; [myview addSubview:myActivityView]; }
在点击表格中开启线程:
//处理点击事件 -(void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath { [NSThread detachNewThreadSelector:@selector(addActivity) toTarget:self withObject:nil]; //⋯⋯⋯⋯⋯⋯ }
实现方法:
- (void)addActivity{ [self.view addSubview:myview]; [myActivityView startAnimating]; }