iOS & Xcode 常見問題整理(持續更新……)

使用iOS & Xcode的時候經常遇到奇奇怪怪的問題，在這整理一下方便查詢。

1. This application’s application-identifier entitlement does not match that of the installed application. These values must match for an upgrade to be allowed.

解決方案：

1、Xcode－Window->Devices

2、選中你的裝置，在右邊的installed Apps中刪除這個App

3、重新編繹即可

2. Xcode has encountered an unexpected error (0xC01C)

解決方案：

重啟Xcode

拔線重插

clean之後執行

3. Unable to simultaneously satisfy constraints.

    [LayoutConstraints] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list
 
 is one you don't want. 
    Try this: 
        (1) look at each constraint and try to figure out which you don't expect; 
        (2) find the code that added the unwanted constraint or constraints and fix it.

    Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in
 
 the debugger.
    The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
    2017-09-14 19:07:39.448008+0800 StudentLive_Sim[28985:4843290] [LayoutConstraints] Unable to simultaneously satisfy constraints.
        Probably at least one of the constraints in the following list is one you don't want. 
        Try this: 
            (1) look at each constraint and try to figure out which you don't expect; 
            (2) find the code that added the unwanted constraint or constraints and fix it.

解決方案：

降低相關約束的優先順序

例如(Masonry)：

    [lineView mas_makeConstraints:^(MASConstraintMaker *make) {
           make.left.equalTo(@(MARGIN_COMMON));
           make.right.equalTo(@(- MARGIN_COMMON));
           make.bottom.equalTo(@(-ParameterFor(44, 45)));
           make.top.equalTo(self.dateLabel.mas_bottom).offset(ParameterFor(80, 85)).with.priority(999);
           make.height.equalTo(@(SINGLE_LINE_WIDTH)).with.priority(999);
       }];

4.The use of Swift 3 @objc inference in Swift 4 mode is deprecated.

The use of Swift 3 @objc inference in Swift 4 mode is deprecated. Please address deprecated @objc inference warnings, test your code with “Use of deprecated Swift 3 @objc inference” logging enabled, and then disable inference by changing the “Swift 3 @objc Inference” build setting to “Default” for the “EasyChartsSwift” target.