代码块路径 （注意：如果你的xcode没有添加过代码块，那你是找不到这个文件夹的）
~/Library/Developer/Xcode/UserData/CodeSnippets
UILabel *<#label#> = [[UILabel alloc] initWithFrame:CGRectMake(<#CGFloat x#>, <#CGFloat y#>, <#CGFloat width#>, <#CGFloat height#>)];
<#label#>.font = [UIFont systemFontOfSize:<#(CGFloat)#>];
<#label#>.textColor = [UIColor colorWithRed:<#(CGFloat)#> green:<#(CGFloat)#> blue:<#(CGFloat)#> alpha:<#(CGFloat)#>];
<#label#>.text =@"<#text#>";
<#label#>.textAlignment = <#NSTextAlignment#>;
<#label#>.numberOfLines = <#CGFloat#>;
[self.view addSubview:<#label#>];
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UIButton *<#button#> = [UIButton buttonWithType:UIButtonTypeCustom];
<#button#>.frame = CGRectMake(<#CGFloat x#>, <#CGFloat y#>, <#CGFloat width#>, <#CGFloat height#>);
[<#button#> setTitle:<#(nullable NSString *)#> forState:UIControlStateNormal];
[<#button#> addTarget:selfaction:@selector(<#selector#>) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:<#button#>];
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UITextField *<#textField#> = [[UITextField alloc] initWithFrame:CGRectMake(<#CGFloat x#>, <#CGFloat y#>, <#CGFloat width#>, <#CGFloat height#>)];
<#textField#>.borderStyle = <#UITextBorderStyle#>;
<#textField#>.placeholder =@"<#NSString#>";
<#textField#>.clearButtonMode = <#UITextFieldViewModeWhileEditing#>;
<#textField#>.returnKeyType = <#UIReturnKeySend#>;
[self.view addSubview:<#textField#>];
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UIImageView *<#imageView#> = [[UIImageView alloc] initWithFrame:CGRectMake(<#CGFloat x#>, <#CGFloat y#>, <#CGFloat width#>, <#CGFloat height#>)];
<#imageView#>.image = [UIImage imageNamed:<#(nonnull NSString *)#>];
[self.view addSubview:<#imageView#>];
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UIBarButtonItem *<#item#> = [[UIBarButtonItem alloc] initWithTitle:<#(nullable NSString *)#>
style:UIBarButtonItemStylePlain
target:self
action:@selector(<#selector#>)];
[self.navigationController.navigationItem setRightBarButtonItem:<#item#>];
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UIAlertController *<#alert#> = [UIAlertController alertControllerWithTitle:<#(nullable NSString *)#>
message:<#(nullable NSString *)#>
preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction*sureAction = [UIAlertActionactionWithTitle:@"确定"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction*_Nonnullaction) {
<#code#>
}];
UIAlertAction*cancelAction = [UIAlertActionactionWithTitle:@"取消"
style:UIAlertActionStyleDefault
handler:nil];
[<#alert#> addAction:sureAction];
[<#alert#> addAction:cancelAction];
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<#view#>.layer.cornerRadius = <#CGFloat#>;
<#view#>.layer.borderWidth = <#CGFloat#>;
<#view#>.layer.borderColor = [UIColor colorWithRed:<#(CGFloat)#>/255.0
green:<#(CGFloat)#>/255.0
blue:<#(CGFloat)#>/255.0
alpha:1];