iOS 10拨打系统电话延迟问题

iOS 10拨打系统电话发现弹出框会延迟2s左右出现，很不爽，研究了一下，发现是openURL在ios 10及其之后会阻塞主线程

所以，拨打电话前，做个判断，来代码,

方案一：

// 拨打电话

+ (void)callPhone:(NSString *)phoneNum {

if (phoneNum.length == 0) {

return;

}

NSString *callPhone = [NSString stringWithFormat:@"telprompt://%@", phoneNum];

NSComparisonResult compare = [[UIDevice currentDevice].systemVersion compare:@"10.0"];

if (compare == NSOrderedDescending || compare == NSOrderedSame) {

/// 大于等于10.0系统使用此openURL方法

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:callPhone] options:@{} completionHandler:nil];

} else {

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:callPhone]];

}

}

方案二

// 拨打电话

+ (void)callPhone:(NSString *)phoneNum {

if (phoneNum.length == 0) {

return;

}

NSString *callPhone = [NSString stringWithFormat:@"telprompt://%@", phoneNum];

dispatch_async(dispatch_get_global_queue(0, 0), ^{

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:callPhone]];

});

}

关于拨打电话的方法，自己凭喜好选择，导致弹出框延迟的原因，目前初步诊断就是openURL在iOS 10及其之后会阻塞主线程