iOS不常用方法总结(获取某个view所在的控制器,禁止锁屏,iOS跳转到App Store下载应用评分等)

释放双眼,带上耳机,听听看~!

获取某个view所在的控制器

- (UIViewController *)viewController {
UIViewController *viewController = nil;
UIResponder *next = self.nextResponder;
while (next)
{
if ([next isKindOfClass:[UIViewController class]])
{
viewController = (UIViewController *)next;
break;
}
next = next.nextResponder;
}
return viewController;
}

获取系统的字体类型和名称

- (void)getSystemFonts{
for(NSString *familyName in [UIFont familyNames]){
NSLog(@"%@",familyName);
NSArray *fontNames = [UIFont fontNamesForFamilyName:familyName];
for(NSString *fontName in fontNames) {
NSLog(@"t|- %@",fontName);
}
}
}

禁止锁屏

[UIApplication sharedApplication].idleTimerDisabled = YES;

iOS跳转到App Store下载应用评分

[[UIApplication sharedApplication] openURL:
[NSURL URLWithString:@"itms-apps://itunes.apple.com/WebObjects/
MZStore.woa/wa/viewContentsUserReviews?
type=Purple+Software&id=APPId"]];

更改状态栏的颜色

- (void)setStatusBarBackgroundColor:(UIColor *)color {
UIView *statusBar = [[[UIApplication sharedApplication] valueForKey:@"statusBarWindow"] valueForKey:@"statusBar"];
if ([statusBar respondsToSelector:@selector(setBackgroundColor:)]) {
statusBar.backgroundColor = color;
}
}

修改UITextField中Placeholder的文字颜色

[textField setValue:[UIColor redColor] forKeyPath:@"_placeholderLabel.textColor"];

获取手机安装的应用

Class c =NSClassFromString(@"LSApplicationWorkspace");
id s = [(id)c performSelector:NSSelectorFromString(@"defaultWorkspace")];
NSArray *array = [s performSelector:NSSelectorFromString(@"allInstalledApplications")];
for (id item in array) {
NSLog(@"%@",[item performSelector:NSSelectorFromString(@"applicationIdentifier")]);
NSLog(@"%@",[item performSelector:NSSelectorFromString(@"bundleIdentifier")]);
NSLog(@"%@",[item performSelector:NSSelectorFromString(@"bundleVersion")]);
NSLog(@"%@",[item performSelector:NSSelectorFromString(@"shortVersionString")]);
}

获取到webview的高度

CGFloat height = [[self.webView stringByEvaluatingJavaScriptFromString:@"document.body.offsetHeight"] floatValue];

设置navigationBar的title

//选择的颜色
UIColor * color = [UIColor whiteColor];
NSDictionary * dict = [NSDictionary dictionaryWithObject:color forKey:UITextAttributeTextColor];
//设置
self.navigationBar.titleTextAttributes = dict;

常用工具

这里写图片描述
这里写图片描述

视图透明,而子视图不透明

[[UIColor blackColor] colorWithAlphaComponent:0.6]]

监听数组变化

@property (nonatomic, strong) NSMutableArray *cellList;
- (NSMutableArray *)cellListWrapper {
return [self mutableArrayValueForKey:@"cellList"];
}

等宽字体,可用于数组对齐和时间显示等

下列几种字体是 iPhone 上的设备字体:
• Serif:Times New Roman、 Georgia 和 _serif
• Sans-serif:Helvetica、 Arial、 Verdana、 Trebuchet、 Tahoma 和 _sans
• 等宽字体:Courier New、 Courier 和 _typewriter、Helvetica Neue

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