iOS & Xcode 常见问题整理(持续更新……)

iOS & Xcode 常见问题整理(持续更新……)

使用iOS & Xcode的时候经常遇到奇奇怪怪的问题，在这整理一下方便查询。

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.

解决方案：

1、Xcode－Window->Devices

2、选中你的设备，在右边的installed Apps中删除这个App

3、重新编绎即可

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

解决方案：

重启Xcode

拔线重插

clean之后运行

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.

解决方案：

降低相关约束的优先级

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.