前言
邊開發邊學習,邊攢經驗,匯總一下記錄到這里
聲明
歡迎轉載,但請保留文章原始出處:)
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1、隱藏/顯示密碼功能
光設置secureTextEntry還不行,你會發現UITextField在切換到顯示密碼時會多一個空字符,看着巨別扭,需要在更改secureTextEntry后進行如下設置:
self.psdField.text = pwd + " "
self.psdField.text = pwd
2、獲取當前類的名稱
注意:通過_stdlib_getDemangledTypeName也能取到,但是如果在父類里面去就只能取到父類的名稱
3、 國際化
find . \( -name '*.m' -o -name '*.h' \) -print0 | xargs -0 genstrings -o en.lproj
凡是使用了NSLocalizedString的字符串都能被找到,支持子目錄查找,注意替換en.lproj
4、UITableView分割線的顯示問題
去掉分割線:設置UITableView的separatorStyle = UITableViewCellSeparatorStyle.None
去掉多余的分割線:設置UITableView的tableFooterView = UIView() (要是不設置會很丑,不管有沒有數據都會顯示分割線)
處理 iOS8 分割線左邊距設置為0失效的問題,參考這里(http://stackoverflow.com/questions/25770119/ios-8-uitableview-separator-inset-0-not-working):
// Remove seperator inset
if cell.respondsToSelector( " setSeparatorInset: ") {
cell.separatorInset = UIEdgeInsetsZero
}
// Prevent the cell from inheriting the Table View's margin settings
if cell.respondsToSelector( " setPreservesSuperviewLayoutMargins: ") {
cell.preservesSuperviewLayoutMargins = false
}
// Explictly set your cell's layout margins
if cell.respondsToSelector( " setLayoutMargins: ") {
cell.layoutMargins = UIEdgeInsetsZero
}
}
5、 格式化數字輸出 K/M
public func substring(startIndex: Int, endIndex: Int) -> String{
return (self as NSString).substringWithRange(NSRange(location: startIndex, length: endIndex - startIndex))
}
}
public static func prettyNumber(num: Double) -> String{
if (num < 10000) {
return " \(Int(num)) ";
} else if (num < 100000) {
return " \(num / 1000.0) ".substring( 0, endIndex: 4) + " K "
} else if (num < 1000000) {
return " \(num / 1000.0) ".substring( 0, endIndex: 3) + " K "
} else if (num < 100000000) {
return " \(num / 1000000.0) ".substring( 0, endIndex: 4) + " M "
} else if (num < 1000000000) {
return " \(num / 1000000.0) ".substring( 0, endIndex: 3) + " M "
} else if (num < 100000000000) {
return " \(num / 1000000000.0) ".substring( 0, endIndex: 4) + " M "
} else if (num < 1000000000000) {
return " \(num / 1000000000.0) ".substring( 0, endIndex: 3) + " M "
}
return " INF ";
}
6、 判斷屏幕是否是橫屏
public static func isIsLandscape() -> Bool { return UIDeviceOrientationIsLandscape(UIDevice.currentDevice().orientation) || UIApplication.sharedApplication().statusBarOrientation == UIInterfaceOrientation.LandscapeLeft || UIApplication.sharedApplication().statusBarOrientation == UIInterfaceOrientation.LandscapeRight }
7、 URL 編碼
text.stringByAddingPercentEncodingWithAllowedCharacters(.URLHostAllowedCharacterSet())
這個 text 的類型是 String ,常用於搜索功能,在 URL 中包含被搜的關鍵字,如果不處理搜中文或者帶空格的英文會直接崩潰