iOS开发小技巧

这里记录一下平时使用的一些小技巧（持续更新中...）

1. 复制内容到剪切板

UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
pasteboard.string = @“testString”; //testString是你要复制的内容

2. 退回到桌面(等同于按Home键)

[[UIApplication sharedApplication] performSelector:@selector(suspend)];

3. 遍历安装的字体

NSArray *familyNames = [UIFont familyNames];
for (NSString *familyName in familyNames) {
    printf(" ---------- familyNames = %s ----------\n",[familyName UTF8String]);
    NSArray *fontNames = [UIFont fontNamesForFamilyName:familyName];
    for (NSString *fontName in fontNames) {
        printf("\tfontName = %s\n",[fontName UTF8String]);
    }
    printf("\n");
}

4. 设置屏幕常亮（禁止黑屏）

//oc版本
[[UIApplication sharedApplication] setIdleTimerDisabled:YES]; 
//swift版本
//UIApplication.shared.isIdleTimerDisabled = true; 

5. 禁用暗黑模式

如果想要适配Dark Model请参考我的另一篇文章适配暗黑模式
全局禁用
方法一：在info.plist中

<key>UIUserInterfaceStyle</key>
<string>Light</string>

方法二：
程序启动的时候让window的模式设为一般模式

if (@available(iOS 13.0, *)) {
    [UIApplication sharedApplication].keyWindow.overrideUserInterfaceStyle = UIUserInterfaceStyleLight;
}

单个界面禁用 (这个会影响他的子视图)

self.overrideUserInterfaceStyle = UIUserInterfaceStyleLight;

6.UIScrollView顶部有留白

iOS11之后出现的现象，解决方案

if (@available(iOS 11.0, *)) {
   scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
}

7.获取App当前版本

NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
NSString *app_Version = [infoDictionary objectForKey:@"CFBundleShortVersionString"];

8.忽略cocoapods警告

在PodFile文件中添加 inhibit_all_warnings!

platform :ios,'9.0'

#忽略pod产生的警告
inhibit_all_warnings!

target 'YourProjectName' do
  # Uncomment the next line if you're using Swift or would like to use dynamic frameworks
  # use_frameworks!
end

9.获取手机连接的WiFi名和WiFi地址

首先我们需要导入 #import <SystemConfiguration/CaptiveNetwork.h> 头文件。
1.获取WiFi名称

//获取SSID（Service Set Identifier）:服务集标识，即WiFi网络的名称。
+ (NSString *)getWifiName{
    NSArray *wifiName = CFBridgingRelease(CNCopySupportedInterfaces());
    id info1 = nil;
    for (NSString *wfName in wifiName) {
        info1 = (__bridge_transfer id)CNCopyCurrentNetworkInfo((CFStringRef) wfName);
        if (info1 && [info1 count]) {
            break;
        }
    }
    NSDictionary *dic = (NSDictionary *)info1;
    NSString *ssidName = [[dic objectForKey:@"SSID"] lowercaseString];
    return ssidName;
}

2.获取WiFi mac地址

//获取BSSID，即WiFi的mac地址
+ (NSString *)getWifiMacAddress{
    NSArray *wfMac = CFBridgingRelease(CNCopySupportedInterfaces());
    id info1 = nil;
    for (NSString *macName in wfMac) {
        info1 = (__bridge_transfer id)CNCopyCurrentNetworkInfo((CFStringRef) macName);
        if (info1 && [info1 count]) {
            break;
        }
    }
    NSDictionary *dic = (NSDictionary *)info1;
    NSString *wifiMac = [dic objectForKey:@"BSSID"];
    return wifiMac;
}

注意：1. ⚠️⚠️⚠️获取WiFi信息的两个方法在iOS12之前可以直接获取WiFi信息。如果是iOS12之后，我们需要找到 Target —> Capabilities —> Access WiFi Information 并打开这个选项。详情请查看 资料 。
2. ⚠️⚠️⚠️iOS13之后我们除了打开Access WiFi Information这个选项，我们还需要打开位置权限，否则也是获取不到WiFi信息的。