小编Joa*_*nes的帖子

使用iOS 10的Apple已弃用openURL:for openURL:option:completionHandler如果我有:

 [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"https://www.google.com"]];

它将如何变成？选项:<#(nonnull NSDictionary*)#>详细说明

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"https://www.google.com"] options:<#(nonnull NSDictionary<NSString *,id> *)#> completionHandler:nil];

谢谢

更新选项:@ {}对于没有键和值的空字典 http://useyourloaf.com/blog/querying-url-schemes-with-canopenurl/

我是初学者,也许这是一个微不足道的问题.我有这个方法:

-(NSString *)getInfoFormediaItem:(MPMediaItemCollection *)list {    
NSString *trackCount;

if ([list count] > 0) {
    trackCount = [NSString stringWithFormat:NSLocalizedString(@"%lu Songs", @""), (unsigned long)[list count]];
} else if([list count] == 1) {
    trackCount = [NSString stringWithFormat:NSLocalizedString(@"1 Song", @"")];
} else {
    trackCount = [NSString stringWithFormat:NSLocalizedString(@"0 Song", @"") ];
}

return [NSString stringWithFormat:@"%@", trackCount];
}

我想在这里用MPMediaItemCollection调用它:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];

if( cell == nil )
{
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"cell"];
} 

MPMediaQuery …

我对Objective-C的经验不多.我试图在用户按下按钮后结束动画.在viewDidLoad我添加了这个:

 UILongPressGestureRecognizer *recoginzer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(onPress:)];
 [_buttonStart addGestureRecognizer:recoginzer];

然后在我用来setCompletionBlock确定动画何时结束的方法中,但它不起作用.

-(void)onPress:(UILongPressGestureRecognizer*)longpress {

if (longpress.state == UIGestureRecognizerStateBegan) {

    circle.path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(2, 2, _buttonStart.frame.size.width-4, _buttonStart.frame.size.height-4) cornerRadius:(_buttonStart.frame.size.width/2)-8].CGPath;
    circle.fillColor = [UIColor clearColor].CGColor;
    circle.strokeColor = [UIColor whiteColor].CGColor;
    circle.lineWidth = 2.5;
    [_buttonStart.layer addSublayer:circle];


    [CATransaction begin];
    CABasicAnimation *drawAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
    drawAnimation.duration            = 3.0;
    drawAnimation.repeatCount         = 1.0;
    drawAnimation.fromValue = [NSNumber numberWithFloat:0.0f];
    drawAnimation.toValue   = [NSNumber numberWithFloat:1.0f];
    drawAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
    [circle addAnimation:drawAnimation forKey:@"drawCircleAnimation"];

    [CATransaction setCompletionBlock:^{
            NSLog(@"DONE");
        }];

    [CATransaction commit];


} else if …